Study reveals difference in muscle response to exercise between trained individuals and beginners
Amman3 min read
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A small scientific study has revealed a difference in the response of muscle cells to physical exertion between men accustomed to endurance sports and those who are untrained, which may help in understanding the impact of athletic experience on the changes that occur within the body during exercise.
According to a report by the American University of New Mexico, the study focused on markers associated with the process of "autophagy," a cellular mechanism through which the body gets rid of damaged or unnecessary components and reuses some of their materials to support cell functions.
The results showed changes in these markers in the untrained participants, consistent with the activation of the process, while no similar changes were recorded in men accustomed to endurance training.
However, the researchers emphasized that these results do not mean that beginners receive greater health benefits from exercise, or that the bodies of trained athletes stop responding to workouts.
The study included 12 men, 7 of whom practice endurance training regularly, and 5 who are untrained. All participants completed a one-hour stationary cycling session at a high intensity determined according to each individual's physical capabilities.
The researchers collected muscle and blood samples before the exercise, and then three hours after its completion, with the aim of monitoring changes in two proteins associated with the autophagy process.
Analyses in the untrained group showed a decrease in one of the two markers and an increase in the other in muscle samples and some blood cells, while the trained group did not show the same changes in the measurements that were examined.
These results indicate that training status may affect the way cells respond to physical exertion, but it is not enough on its own to determine the differences in long-term health benefits between the two groups.
The researchers noted a convergence in the trend of changes recorded in blood and muscle samples, which opens the way for studying the possibility of using blood tests to monitor some muscular responses.
This method may allow for easier monitoring of some cellular processes in the future compared to taking direct samples from muscle tissue, but proving its accuracy and ability to represent what happens inside the muscles requires further research.
The study's results remain limited due to the small number of participants and the sample being restricted to men, in addition to testing only one type of exercise during a single session.
Furthermore, changes in proteins associated with autophagy do not alone provide conclusive evidence of the activity level of the entire cellular process or the amount of health benefit achieved by exercise.
Therefore, the results do not call for increasing exercise intensity or changing training programs, but rather provide preliminary indicators that call for broader studies including women, different types of physical activities, and longer follow-up periods to understand how regular training affects cellular responses to physical exertion.
