Friday, March 03, 2023

Study: More paid sick leave results in more cancer screenings

The findings highlight the benefits of paid leave mandates as a way to increase healthcare access and potentially improve healthcare equity in the U.S., where 1 in 4 people have no paid sick leave

Peer-Reviewed Publication

TULANE UNIVERSITY

For most Americans, the two major obstacles to proper medical care are time and money. And while insurance can sometimes reduce healthcare costs, having time to visit the doctor is just as important.

Now, a new Tulane University study published in the New England Journal of Medicine has found that more people get screened for cancer when employers are mandated to provide paid sick leave. During a 7-year period covered by the study, breast cancer screening rates increased up to 4% and colorectal cancer screenings increased between 6-8% in areas exposed to policy-driven paid sick leave mandates. 

“These non-monetary barriers to healthcare access matter,” said Kevin Callison, lead author and assistant professor of health policy and management at Tulane’s School of Public Health and Tropical Medicine and The Murphy Institute. “Improving or reducing these barriers can have meaningful impacts on people’s health.”

The U.S. is the only wealthy nation in the world to not federally mandate paid time off for being sick, according to the Center for Economic Policy and Research. According to the U.S. Bureau of Labor Statistics, about 1 in 4 American workers can’t take a single paid sick day.

The study, which was co-authored by researchers from Georgia State University and the University of California San Francisco, examined changes in breast cancer and colorectal cancer screening rates among 2 million private sector employees from 2012-2019, a time in which several states and cities adopted policies mandating paid sick leave. The workers were spread among 300 metropolitan statistical areas, 61 of which were exposed to a paid sick leave mandate during that timeframe.

Though the increases in screening rates may seem small, these results include workers who already had paid sick leave, meaning they were unlikely to decrease or increase cancer screening habits. If the results were scaled to focus only on workers gaining sick leave for the first time via mandates, Callison estimated that breast cancers screening rates increase 9-12% and colorectal screening rates increase 21-29%.

“Our effects become much larger if we're willing to assume that only the workers who are gaining paid sick leave coverage are the ones who are changing their screening behaviors,” Callison said.

Past studies have examined the relationship between sick days and cancer screening rates by comparing rates among those with leave to those without. But some workers are more health-conscious than others and may exclusively seek jobs that offer paid sick leave. By focusing on the change in screening rates brought by policy-driven mandates, this study removed some of the potential behavior-based biases.

“Because we focused on these policies that drive changes in coverage rather than people self-selecting into coverage, our argument is that we have a more accurate estimate of the relationship between paid sick leave and cancer screening,” Callison said.

The results underscore the value of sick days. Callison said it’s “reasonable to assume that more cancer screenings lead to earlier detection and better outcomes,” but more research is needed to determine if paid sick leave means cancers are caught earlier and if mortality rates decline.

To Callison, these results also represent one potential way of increasing healthcare equity in the United States.

The majority of those without paid sick leave are people of color and those with less wealth and less education. And though 17 states and 18 cities have adopted paid sick leave, 18 states have passed laws prohibiting cities from passing similar mandates.

“We know that racial and ethnic minorities tend to have higher mortality rates for certain cancers,” Callison said. “So are things like this going to improve those gaps? That’s really the next step where we want to go.”

THANK JOE

Endocrine Society applauds Eli Lilly’s

efforts to lower insulin costs


Monthly price caps should be available to everyone who depends on insulin

Business Announcement

THE ENDOCRINE SOCIETY

The Endocrine Society commends Eli Lilly and Company for taking steps to reduce insulin prices and make insulin affordable for more people with diabetes.

Eli Lilly's announcement to cut insulin prices by 70% and extend the $35 per month insulin cap to people with private insurance is a positive step towards making insulin affordable for the more than 7 million Americans that rely on the medication.

“Lilly’s move to apply a $35/month cap for people with private insurance will be a significant improvement for adults and children with diabetes who use Lilly’s products,” said Endocrine Society Chief Medical Officer Robert Lash, M.D. “We encourage all insulin manufacturers to join in the effort to reduce out-of-pocket costs for people who need insulin.”

The Endocrine Society has championed measures to improve insulin access for years. Last year, we were pleased that a $35/month cap on insulin for people with Medicare was included in the Inflation Reduction Act and implemented this January 1. The Endocrine Society continues to call on Congress to pass an insulin price cap for all people with private insurance.

More than 7 million people nationwide rely on insulin to manage their diabetes. According to the U.S. Center for Disease Control and Prevention, 37.3 million people nationwide—about 11 percent of Americans—have diabetes.

While insulin was discovered more than 100 years ago, the price of insulin nearly tripled between 2002 and 2013, and the trend upward has continued over the past decade. In 2021 alone, nearly one in five American adults with diabetes—about 1.3 million people—rationed their insulin to save money, according to a study.

The Society will continue to work to improve insulin access for all who need it. 

“Our patients who rely on insulin have waited long enough. The time to act is now,” Lash added.

# # #

Endocrinologists are at the core of solving the most pressing health problems of our time, from diabetes and obesity to infertility, bone health, and hormone-related cancers. The Endocrine Society is the world’s oldest and largest organization of scientists devoted to hormone research and physicians who care for people with hormone-related conditions.

The Society has more than 18,000 members, including scientists, physicians, educators, nurses and students in 122 countries. To learn more about the Society and the field of endocrinology, visit our site at www.endocrine.org. Follow us on Twitter at @TheEndoSociety and @EndoMedia.

Pressure mounts on the other two major

insulin makers to slash prices

Analysis by Rachel Roubein
with research by McKenzie Beard
March 2, 2023 

Eli Lilly announces it will cut insulin list prices. Novo Nordisk and Sanofi haven’t said they’ll do the same.

Drugmaker Eli Lilly announced it was slashing list prices of older insulin products and expanding its program capping how much patients pay for the lifesaving drug to $35 per month.

It didn’t take long for pressure to mount on the other two main insulin makers to follow suit.

Sen. Bernie Sanders (I-Vt), the chair of the chamber’s sweeping health panel, quickly sent letters to Sanofi and Novo Nordisk urging the manufacturers to join Eli Lilly in lowering costs. President Biden called on “other manufacturers to follow.” And Eli Lilly has said its competitors should reduce their prices as well.

Neither Sanofi nor Novo Nordisk indicated plans to immediately copy Eli Lilly’s move, while pointing to other programs they have in place that substantially decrease costs for many patients.

The public pressure yesterday is a prime example of the intense scrutiny the three companies have been under for years to clamp down on the soaring costs of their insulin products. The drug is used daily by roughly 7 million Americans with diabetes to manage their blood sugar levels, and the list prices of the medications have doubled — and in some cases tripled — over the past decade, bipartisan Senate investigators said in a 2021 report.

“I think you can safely say that, like many followed price increases, expect these guys to follow price decreases, too,” said one Democratic pharmaceutical lobbyist who spoke on the condition of anonymity to be candid.

More from Biden:


The details

The move comes after congressional Democrats passed legislation last year imposing a $35 cap on how much Medicare patients pay for insulin. Republicans successfully jettisoned the part of the proposal that would have applied to privately insured patients, arguing it didn’t conform with certain budgetary rules.

Democratic lawmakers, advocates and experts welcomed Eli Lilly’s announcement, though it appears to be not as sweeping as originally meets the eye. Experts say it could particularly help uninsured patients who pay cash and those with private insurance who weren’t part of the company’s already existing program to cap monthly costs at $35 per month.

That program will be improved for patients with private insurance. That’s because the price will be automatically adjusted by pharmacies participating in the program, which amounts to roughly 85 percent of local and national retail pharmacies. Those without insurance will need to continue to download a savings card online so they can get the price cap.

The company also said it would reduce the list price of certain insulins.
For instance: Lilly’s most affordable insulin — its non-branded lispro injection — will run about $25 per vial starting May 1, compared with the current price of $82.41. The list price for Humalog, its most commonly prescribed insulin, and Humulin will drop 70 percent effective in the last three months of the year.
The company also plans to launch a new longer-acting insulin, which it says is interchangeable with a product from competitor Sanofi, but cheaper.

The money trail

One question is whether the change will impact the company’s bottom line.

Some experts said they thought it probably wouldn’t, at least not much, and pointed to the company’s stock price ticking up slightly yesterday.

“Lilly may actually not be losing much in the way of revenue by cutting the list price this way,” Stacie Dusetzina, a professor of health policy at Vanderbilt University School of Medicine. It might be a small change in the amount of money they get for these products, but they could make up for it with additional volume, she said.

The fact that it might not hurt the company’s profits doesn’t mean the move is “a bad thing,” said Craig Garthwaite, a health economist at Northwestern University’s Kellogg School of Management. “We wanted list prices to go down, we have now gotten those prices to go down. That is a good thing.”



Emerging field of evolutionary medicine could address range of health conditions

UCLA researchers say the approach could help tackle cancer, antibiotic resistance, food-related disorders

Peer-Reviewed Publication

UNIVERSITY OF CALIFORNIA - LOS ANGELES

Evolution has helped many members of the animal kingdom adapt to overcome or resist a range of medical issues that scientists are trying to solve in humans.

The giraffe, for example, has a gene that protects the heart from being damaged by blood pressure that would be high enough to ruin a human heart. Elephants possess multiple copies of a gene, one that’s common in mammals, that makes them highly resistant to cancer. And naked mole rats seem almost immune to aging.

Now, scientists in an emerging field of study are studying the evolution of those and other traits to better understand the origins of human diseases — and to pursue cures for conditions that seem intractable.

In a paper published Feb. 28 in Frontiers in Science, an international team of scientists led by two UCLA evolutionary biologists lays out a research plan for “evolutionary medicine.”

Evolutionary medicine applies insights from ecology and evolution to inform, direct and improve biomedical research, public health measures and clinical care. Observing that there are likely countless disease-resistance mechanisms among the vast diversity of life on Earth, the authors argue for the need to systematically search out those mechanisms, uncover their physiological bases and use those findings as the foundation for new clinical treatments and improved public health policy.

“Our bodies and minds evolved in one environment but are living in another — and that mismatch causes disease,” said Dr. Barbara Natterson-Horowitz, the paper’s first author, a cardiologist and evolutionary biologist at UCLA and Harvard University. “Evolutionary mismatch underlies many forms of heart disease, cancer, reproductive disorders and even mental health challenges.”

Conditions like those often are treated as lifestyle diseases; current interventions tend to place the responsibility for treatment on the patient — calling for exercise and dietary changes, for example. However, changing health behaviors doesn’t always work.

“It’s not about treating diabetes when a person gets it at 40, but about making the investment during childhood,” said Daniel Blumstein, a UCLA professor of ecology and evolutionary biology and a co-author of the paper. “Policies that promote interventions early in life can have an immensely positive effect on future health and welfare.”

The paper presents four broad areas in which insights from evolution and ecology could bring the biggest benefits to human health.

  • Identifying evolutionary and developmental mismatches with human behaviors could lead to new interventions for obesity, Type 2 diabetes, cardiovascular disease, allergies, conditions related to gut health and mental illness.
  • Studying infectious disease epidemiology, such as the evolution in virulence and transmissibility of viruses, could help prevent or stop future pandemics.
  • Improving understanding of human development in an evolutionary perspective, could help solve problems in growth, reproduction and aging.
  • Learning more about the evolutionary tradeoffs that influence human behavior could inform efforts to promote habits that improve health and longevity.

“Understanding our collective human evolutionary history can help us forecast future public health burdens,” said Molly Fox, a co-author of the paper and a UCLA assistant professor of anthropology and of psychiatry. “Across the animal kingdom and the fossil record, we can draw from a vastly larger pool of information than traditional epidemiology to understand how environments and lifestyles shape the basic processes underlying disease.”

An evolutionary approach could also help guide the development of drugs that don’t induce bacteria to become antibiotic-resistant — interfering with bacteria’s ability to evolve, for example, or using viruses called phages that could infect bacteria and cause them to become more susceptible, rather than more resistant, to treatment.

The authors also describe a possible evolution-inspired approach to overcoming chemotherapy resistance in people with cancer: treating the cancer like an organism undergoing extinction.

“The idea is that an effective way to eradicate a population is to first critically reduce its size with an ecological catastrophe — like the meteor strike for the dinosaurs,” Blumstein said. “And then kill remaining individuals with a second disaster — like the famine that followed the meteor.”

“Extinction therapy” would translate that principle into a clinical strategy. Patients would receive a high dose of one cancer drug to reduce a tumor’s size, as in current protocols. But before drug resistance has a chance to arise, the first treatment would be replaced by another to kill off the remaining cancer cells.

“Knowledge from the wild can inform our understanding of human health,” said Natterson-Horowitz, adding that her own thinking on the subject changed during her time as a medical consultant to the Los Angeles Zoo. “Biodiversity in the natural world can be a powerful source of insights that can accelerate biomedical innovation.”

ABOLISH PATENTS

35 years of US investment in research led to development of mRNA COVID vaccines


In the three decades leading up to the pandemic, the US government invested $31.9 billion in research that supported the development of mRNA COVID-19 vaccines in 2020, $337 million of which was invested before the pandemic, finds a Brigham and Women's–led study published yesterday in The BMJ.

The researchers searched public databases for government-funded grants on four foundational innovations that directly led to the development of mRNA COVID-19 vaccines, including lipid nanoparticle, mRNA synthesis or modification, spike protein structure, and mRNA vaccine biotechnology from January 1985 to March 2022.

Effort involved 34 NIH research grants  

The team identified 34 research grants funded by the National Institutes of Health (NIH) that were directly related to the development of mRNA COVID-19 vaccines in 2020. In combination with other government grants and contracts, the research totaled $31.9 billion.

Of the $337 million invested before the pandemic, NIH invested $116 million (35%) in basic and translational science related to mRNA vaccine technology, while the Biomedical Advanced Research and Development Authority (BARDA) invested $148 million (44%), and the Department of Defense invested $72 million (21%).

After the pandemic began, $29.2 billion (92%) of US public funds went toward buying 2 billion advance vaccine doses, $2.3 billion (7%) was spent on clinical trials, and $108 million (less than 1%) was directed to manufacturing and basic and translational science.

Overall, the government paid $18.1 billion to Moderna ($16.2 billion [89%] for vaccines) and $13.1 million to Pfizer/BioNTech (mostly for vaccines). One billion doses were set aside for international donation from Pfizer at a much lower price than those for Americans.

"Although the public funding supporting Moderna is widely recognized, Pfizer-BioNTech executives have claimed that the company did not accept any US government support to develop its vaccine," the authors wrote. "However, Pfizer-BioNTech would not have been able to develop an mRNA covid-19 vaccine without the licensed technologies emerging from research funded by US taxpayers."

The researchers noted the study likely underestimates the true prepandemic public investment, because it didn't include those from other countries, foundations, or companies.

Pfizer-BioNTech would not have been able to develop an mRNA covid-19 vaccine without the licensed technologies emerging from research funded by US taxpayers.

"The development of mRNA COVID-19 vaccines during the pandemic was a monumental scientific success and was possible because of the scientific discoveries that took place in the preceding decades," corresponding author Hussain Lalani, MD, MPH, of Brigham and Women's Hospital, said in a Brigham news release

But the authors called for policy reforms and follow-up on technology licenses to ensure that manufacturers are making the vaccines appropriately available to equitably support global public health. "mRNA vaccines have saved millions of lives," Lalani said. "The substantial public investment in research that led to these vaccines should justify equitable and affordable access to these lifesaving vaccines globally."

Public risk, private rewards

In a commentary in the same journal, Victor Roy, MD, PhD, of the Yale School of Medicine, said that while mRNA COVID-19 vaccines are a significant achievement, their development illustrates how society invested in and bore the risk of pursuing such innovation while corporate shareholders reaped most of the rewards.

Fueled largely by the global sale of their COVID-19 vaccines, Moderna and Pfizer have made more than $100 billion in global revenues, which Roy pointed out is more than 20 times the World Health Organization's budget for 2020-21.

"Yet for a vaccine that is estimated to cost $1-3 per dose to manufacture, both Moderna and Pfizer have announced plans to charge more than $110 a dose in the US this year—a price that Moderna’s CEO Stephan Bancel has argued is 'consistent with the value' of these vaccines," he wrote.

Yet for a vaccine that is estimated to cost $1-3 per dose to manufacture, both Moderna and Pfizer have announced plans to charge more than $110 a dose in the US this year.

Victor Roy, MD, PhD

To better direct the value it helped create, Roy argued, the US government should have pursued a goal of global COVID-19 vaccination by guiding decisions about intellectual property and technology transfer.

"Secondly, to achieve public goals, the US government can use its position as a pivotal investor and buyer to set conditions in contracts," he said. "These conditions would relate to pricing and access, technology transfer, and reinvestment in innovation."

Last, Roy said governments should build public investment options to make important health technologies, which would secure supplies during public health crises, allow reinvestment of revenues into domestic innovation and manufacturing, and offer negotiating leverage for fairer agreements with private manufacturers.

"Instead of maximizing value for corporate shareholders, these alternatives would enable governments to translate public investments more fully in the service of public health—a fundamental priority as we examine our response to this pandemic and prepare for the next," he concluded.

Public investment in critical research contributed to the success of mRNA COVID-19 vaccines

Analysis finds that in the 35 years before the Covid-19 pandemic, the U.S. government invested at least $337 million into research that directly led to the mRNA COVID-19 vaccines

Peer-Reviewed Publication

BRIGHAM AND WOMEN'S HOSPITAL

Moderna and Pfizer-BioNTech have recently announced plans to increase the price of their respective mRNA COVID-19 vaccines, thrusting them into the spotlight of debates around drug price hikes. A new study, led by investigators from Brigham and Women’s Hospital, a founding member of the Mass General Brigham health care system, analyzed the role of public funding in the development of mRNA vaccines. In a systematic assessment, the team found that over the last 35 years, three federal agencies—the National Institutes of Health, the Department of Defense, and the Biomedical Advanced Research and Development Authority—invested at least $337 million into critical research, including basic and translational science, and vaccine development that directly led to the mRNA Covid-19 vaccines.

In addition, during the first two years of the pandemic, the U.S. government contributed over $31.6 billion to support clinical trials, manufacturing, and vaccine supply for all Americans and for global donation. These investments include more than $18 billion to Moderna and $13 billion to Pfizer-BioNTech.

“The development of mRNA COVID-19 vaccines during the pandemic was a monumental scientific success and was possible because of the scientific discoveries that took place in the preceding decades,” said Hussain Lalani, MD, MPH, of the Program On Regulation, Therapeutics, And Law (PORTAL), Division of Pharmacoepidemiology and Pharmacoeconomics in the Department of Medicine at Brigham and Women's Hospital and corresponding author of the BMJ article. “mRNA vaccines have saved millions of lives. The substantial public investment in research that led to these vaccines should justify equitable and affordable access to these lifesaving vaccines globally.”

GLASS HALF FULL

Only two in five British businesses have introduced support to help staff with the rising cost of living as many see operating costs rise


















Work Foundation research reveals 66% of senior business leaders agree that employers have a ‘substantial role’ to play in supporting staff through the rising cost of living, but only 40% have introduced new support

Reports and Proceedings

LANCASTER UNIVERSITY

New research from the Work Foundation at Lancaster University reveals that while two thirds of senior business leaders (66%) agree that employers have a ‘substantial role’ to play in supporting staff through the rising cost of living, only 40% have introduced new support measures since the start of 2022. 

At the same time, four in ten business leaders (41%) also report increases in production costs in their organisation. Pressures that are likely to increase, the Work Foundation warns, as Government support on energy costs reduces in April 2023, with sectors like hospitality and leisure particularly at risk. 

Polling more than a thousand senior decision-makers from British firms in December 2022, the new study explores the role organisations have to play in supporting staff during the cost of living crisis.  

Findings reveal that financial wellbeing support for employees throughout 2022 was ad-hoc, responsive and focused on the short-term. Data also shows: 

  • Less than one in five (18.2%) British business leaders who introduced cost of living support said they awarded pay rises that were above standard incremental increases – failing to protect employees’ pay against double-digit inflation. 
  • After pay rises, the second most common offer of support was a one-off bonus/ cost of living support payment for staff (17.7%). While a huge help to many, such discretionary payments can cause disruptions and reductions in essential social security payments for low income workers. 
  • Larger organisations are more likely to have provided support to mitigate the impact of rising costs on workers than smaller firms (49% and 32% respectively). 

The study also indicates a split between workers when it comes to their expectations of their employers. Staff in secure employment and on higher pay tend to expect more of their organisations. They expect broader ranges of support to be available, beyond pay rises; whereas lower paid workers in more insecure forms of employment don’t expect any support beyond pay increments. 

Ben Harrison, Director of the Work Foundation at Lancaster University, said: “Employers have a crucial role in supporting their workers through the cost of living crisis. Even if we see inflation halve in 2023, the impact of rising prices will last long into the future, especially for those on low incomes and in insecure employment – factors which disproportionately affect women, disabled people and those from black and ethnic minority backgrounds.  

“It’s vital that business leaders engage with their workforce to understand the challenges their employees face, and put proper financial wellbeing strategies in place. Ensuring pay levels rise as close to inflation as possible is key, but if businesses find themselves unable to afford such an uplift, there are lots of other ways they can offer support.”  

The study reveals some of the employers who are providing support are finding innovative ways to help. Examples include providing in-store vouchers or pre-loaded giftcards; flexibility over pay dates, independent financial planning advice and interest free loans to help employees move away from a reliance on pre-paid energy metres.  

However, the research also indicates a reluctance from many employees to speak up about their financial circumstances. 

“Although the relationship between employers and employees has shifted since the pandemic, our research does suggest there remains a stigma that prevents many employees from feeling able to discuss their circumstances and seek much-needed support at work,” Harrison adds. “Employers looking to act must prioritise creating an inclusive and safe workplace culture, and offer means of accessing support that their employees feel comfortable in harnessing.” 

One of the employers involved in the Work Foundation research, One+All, is an SME based in Stockport that produces schoolwear, and introduced financial wellbeing support during the cost of living crisis. Donald Moore, Chair of One+All, said, “The majority of our colleagues earn less than £30,000 a year so their financial wellbeing has always been important to us. We have had support available for many years including interest free loans, money management, profit share and signposting. With the cost of living crisis having a serious impact on so many people we wanted to find out how our colleagues were coping, and better understand those in need. 

“We sent out a colleague survey and that told us that a couple of them had prepaid energy meters which can be much more expensive. Many colleagues wanted more help with money management with us and with our bank. As a result of our findings, we were able to increase profit share to mitigate their increase in food and energy costs. We also helped those in need with interest free loans to move away from prepaid meters. All colleagues were delighted with our response to their concerns.” 

The Work Foundation also suggests Government has a pivotal role to play, and should take steps to provide workers with as much security as possible by strengthening employment rights and ensuring everyone has access to good, secure work. It recommends the Department for Business and Trade spearhead an Employment White Paper consultation to set out comprehensive proposals for enhancing employment rights and protections fit for the 21st century. 

The Work Foundation briefing, ‘Shifting sands: Employer responsibility during the cost of living crisis is published today and offers a series of recommendations for employers and guidance on how financial wellbeing measures can be implemented effectively. 

It is available to all via the Work Foundation website: www.theworkfoundation.com  




Can’t exercise a particular muscle? Strengthening the opposite side of your body can stop it wasting away

Loss of muscle strength can be a damaging outcome when someone is unable to move a part of their body for a long period of time. But a new study may have found a way to protect against this — and it doesn’t even involve the affected body part at all.

Peer-Reviewed Publication

EDITH COWAN UNIVERSITY

Loss of muscle strength can be one of the most damaging outcomes when someone is unable to move a part of their body for a long period of time.

 

But a new Edith Cowan University (ECU) study may have found a way to offset or even protect against this — and it doesn’t even involve the affected body part at all.

 

Injury or illness may see a part of the body incapacitated for weeks or even months, causing unused muscles to weaken and lose their mass and strength, which can have a huge impact on people’s lives.

 

Lead researcher Professor Ken Nosaka noted it was already known gaining muscle strength in one limb due to resistance training will transfer to the same muscle on the opposite side of the body.

 

“This is known as the cross-education effect,” he said.

 

“However, the key aspect of this study is one particular type of muscle contraction proved most effective,” Professor Nosaka said.

 

The study

 

The research was a collaboration between ECU and Professor Trevor Chen from National Taiwan Normal University.

 

It saw 36 sedentary young men have their non-dominant arm immobilised by wearing a cast at their elbow joint for three weeks.

 

They were then split into three even groups: a concentric contraction group that lifted a dumbbell using the non-immobilised arm, an eccentric contraction group that lowered a dumbbell, and a control group that performed no exercises (see definitions below).

 

While their arm was immobilised, the concentric and eccentric groups had six weightlifting sessions twice a week, for three weeks.

 

These sessions would see them perform five sets of six dumbbell curls with a dumbbell corresponding to 20, 40, 40, 60, 60 and 80 per cent of their maximal strength over the six sessions.

 

Eccentric is best

 

When the cast was removed, the control group who did no exercises saw more than 15 per cent decreases in strength in the immobilised arm.

 

However, those who lifted weights saw little to no drop off in the immobilised arm’s muscle strength.

 

The concentric group saw muscle strength reduced to 4 per cent, but interestingly, muscle strength increased 4 per cent for the eccentric group, showing a stronger cross-education effect.

 

Researchers also measured the size of the muscle on the immobilised arm.

 

The control group saw muscle size decrease by around 12 per cent, whereas both concentric and eccentric muscle contractions with the opposing arm counteracted muscle atrophy in the immobilised arm.

 

Muscle size still decreased 4 per cent for the concentric group, while — remarkably — no decreases in muscle size were observed for the eccentric group.

 

 

Muscle damage protective effect

 

All participants were asked to perform 30 eccentric contractions with their immobilised arm once the cast was removed, with researchers measuring various muscle damage markers before, immediately following, and five days after the exercise.

 

The control group showed very severe muscle soreness and strength loss after the exercise, with the concentric group showing far less damage.

 

Again, the eccentric group saw the best results, providing a protective effect strong enough for peak muscle soreness to be reduced 80 per cent compared to the control group and 40 per cent of the concentric group.

 

Professor Nosaka said these results supported previous ECU research highlighting the benefits of eccentric exercise.

 

“We already know eccentric muscle contractions appear to be the most effective at promoting muscle strength and size gains — even in very small doses,” he said.

 

“It is important to investigate whether this latest study’s results are replicated for other muscles and whether eccentric resistance training is effective when dealing with immobilisation in real injuries, such as ligament sprains or tears, bone fracture, and post-surgery.

 

“However, healthcare providers can recommend resistance training — and eccentric contractions in particular — to minimise the negative effects of immobilisation and hopefully lessen its impact on people’s lives.”

 

‘Effects of unilateral eccentric versus concentric training of non-immobilize arm during immobilization’ was published in Medicine and Science in Sports and Exercise.

 

 

Definitions

 

There are three classifications of muscle contractions that relate to what the muscle is doing when being activated. 

 

Concentric contraction ­- lifting the weight (muscle is shortening)

Eccentric contraction - lowering the weight (muscle is lengthening)

Isometric contraction - holding the weight parallel to the ground (muscle is stationary under load)