Scientists Identify Molecule That Can Strengthen Muscles Without Exercise

Scientists have identified a molecule released by muscles during exercise that could eventually help preserve or improve muscle function in people unable to engage in physical activity.

Researchers at the University of Leeds found that L-β-aminoisobutyric acid, known as L-BAIBA, plays a role in how skeletal muscles adapt to exercise.

The findings, published in Nature Communications, could help explain how exercise produces some of its benefits and potentially lead to treatments for people with conditions that limit their ability to exercise.

L-BAIBA is released by skeletal muscle during exercise and appears to act as a signaling molecule, triggering changes that make muscles more efficient and resilient.

In experiments involving mice, animals given BAIBA developed larger muscles, improved muscle function, greater resistance to fatigue and better exercise performance than untreated animals.

The researchers also found that BAIBA helped protect against muscle weakness and dysfunction in mice with obesity and type 2 diabetes, conditions that can be associated with reduced mobility and declining muscle health.

The study found that L-BAIBA, rather than a related form called D-BAIBA, was responsible for many of the muscle-strengthening effects observed in animal and laboratory experiments.

The researchers said the findings suggest L-BAIBA is part of a biological pathway that helps muscles remodel and adapt in response to exercise training.

Levels of circulating L-BAIBA were also associated with aerobic fitness in humans and increased following both a single session of endurance exercise and longer-term endurance training.

The findings could eventually lead to an “exercise pill,” but researchers cautioned that such applications remain some way off.

Lee Roberts, professor of molecular physiology and metabolism at the University of Leeds, said boosting L-BAIBA could potentially benefit people who struggle to exercise, although more research is needed.

“We can’t say for certain, but this is a possibility,” Roberts said. “We know BAIBA can improve muscle function in experimental models of diabetes. In the next few years we hope to understand whether it might be beneficial more broadly to other conditions that can impact the capacity of people to exercise.”

The researchers said BAIBA could eventually have therapeutic potential for conditions associated with muscle loss or dysfunction, including age-related muscle decline, heart failure and cancer-related wasting. They stressed, however, that further studies are needed to establish whether the molecule could be used as a treatment.

Understanding how exercise-related molecular signals work could help scientists develop therapies that mimic some of the beneficial effects of physical activity for people who cannot exercise.

For now, exercise remains the most direct way to increase BAIBA naturally.

“We see increased BAIBA with endurance or aerobic type exercise like running, jogging or cycling,” Roberts said. “The best way to boost BAIBA is to try to take part in these activities consistently.”

Stay ahead of the Stories shaping our world. Subscribe to Impact Newswire and join our 
WhatsApp Channel for updates on global tech, business, and innovation—all in one place.

Dive deeper into the future with the Cause Effect 4.0 Podcast, where we explore the ideas, trends, and technologies driving the global AI conversation.

Got a story to share? Contact Us to reach a global audience with Impact Newswire.