Exercise-induced skeletal muscle signaling pathways and human athletic performance

Area of Science:

• Exercise physiology
• Molecular biology
• Skeletal muscle adaptation

Background:

• Skeletal muscle plasticity allows adaptation to exercise stimuli like endurance and resistance training.
• Training adaptations are crucial for enhancing physical work capacity but exhibit significant inter-individual variability.
• Molecular techniques have revealed complex cellular networks underlying exercise responses.

Purpose of the Study:

• To review the molecular and cellular mechanisms driving skeletal muscle adaptation to exercise.
• To discuss signaling proteins and reactive species involved in exercise performance enhancement.
• To examine the molecular basis for varied responses to different exercise modes and the disconnect between molecular markers and performance.

Main Methods:

• Literature review of molecular and cellular events in exercise adaptation.
• Discussion of cell signaling pathways and reactive oxygen/nitrogen species.
• Analysis of molecular underpinnings of heterogeneous training responses.

Main Results:

• Exercise induces significant molecular and cellular changes in skeletal muscle.
• Specific signaling proteins and reactive species modulate adaptation and performance.
• Individual responses to exercise training are molecularly diverse.
• A dissociation exists between molecular adaptation markers and actual exercise performance.

Conclusions:

• Skeletal muscle adaptation to exercise involves intricate molecular signaling networks.
• Understanding these pathways is essential for predicting and optimizing training outcomes.
• Individual variability in response highlights the need for personalized exercise strategies.