A bacterium has been found that strengthens and increases human muscles

Spanish scientists have discovered that certain gut bacteria may be linked to increased muscle strength by affecting energy processes in the body.

As reported by BAKU.WS with reference to Gut, specialists from the University of Almería found that the bacterium Roseburia inulinivorans is capable of having a positive effect on physical strength.

During the study, scientists analyzed the gut microbiome of two groups of volunteers: young people aged 18–25 and elderly participants over 65 with low physical activity. The subjects underwent a series of tests, including grip strength measurement, leg press, and bench press.

The results showed that representatives of the genus Roseburia were more commonly found in people with higher strength indicators. The species R. inulinivorans stood out in particular — its presence correlated with better results across several tests at once. For instance, elderly participants with this bacterium had nearly 30% higher grip strength, while young participants showed not only greater strength but also better endurance.

For additional verification, the scientists conducted an experiment on animals: after introducing the bacterium to mice, their strength increased by approximately one-third. They also recorded growth of muscle fibers and an increase in the number of fast-twitch muscle cells responsible for powerful movements.

The researchers suggest that the mechanism is related to the bacterium's influence on amino acid metabolism and energy processes in muscles. In the future, according to international experts, these findings could be used to develop probiotics aimed at maintaining physical fitness and muscle strength.