Cellular Stress Response Gene Expression During Upper and Lower Body High Intensity Exercises

Area of Science:

• Exercise physiology
• Molecular biology
• Sports science

Background:

• Understanding the molecular mechanisms underlying exercise adaptation is crucial for optimizing training.
• Previous research has focused on specific muscle groups, but a direct comparison of upper vs. lower body high-intensity exercise on gene expression is less explored.

Purpose of the Study:

• To compare the effects of high-intensity upper and lower body exercise on the expression of selected genes in athletes and non-athletes.
• To investigate potential differences in gene expression patterns between elite artistic gymnasts and physically active men.

Main Methods:

• Fourteen elite male artistic gymnasts (EAG) and 14 physically active men (PAM) underwent 30-second Wingate tests for both lower and upper body exercises.
• Blood samples were collected pre-exercise and at 5 and 30 minutes post-exercise.
• Gene expression was analyzed using Polymerase Chain Reaction (PCR).

Main Results:

• Lower body exercise resulted in significantly higher mechanical power output (relative and mean power) in both gymnasts and controls.
• No significant differences in the expression of tested genes were observed between upper and lower body exercise, nor between gymnasts and PAM.
• A time-dependent effect was noted for Interleukin-6 (IL-6) messenger RNA (mRNA) expression.

Conclusions:

• The similar gene expression patterns suggest that both upper and lower body high-intensity exercise can induce comparable adaptive responses at the cellular level.
• These findings imply that training programs can incorporate both upper and lower body exercises to achieve similar benefits in cellular stress response and adaptation.