Muscle fiber type diversification during exercise and regeneration

Rizwan Qaisar, Shylesh Bhaskaran, Holly Van Remmen

Research output: Contribution to journalArticlepeer-review

89 Scopus citations


The plasticity of skeletal muscle can be traced down to extensive metabolic, structural and molecular remodeling at the single fiber level. Skeletal muscle is comprised of different fiber types that are the basis of muscle plasticity in response to various functional demands. Resistance and endurance exercises are two external stimuli that differ in their duration and intensity of contraction and elicit markedly different responses in muscles adaptation. Further, eccentric contractions that are associated with exercise-induced injuries, elicit varied muscle adaptation and regenerative responses. Most adaptive changes are fiber type-specific and are highly influenced by diverse structural, metabolic and functional characteristics of individual fiber types. Regulation of signaling pathways by reactive oxygen species (ROS) and oxidative stress also plays an important role in muscle fiber adaptation during exercise. This review focuses on cellular and molecular responses that regulate the adaptation of skeletal muscle to exercise and exercise-related injuries.

Original languageEnglish (US)
JournalFree Radical Biology and Medicine
StateAccepted/In press - Oct 28 2015
Externally publishedYes


  • Exercise
  • Fiber types
  • Injury
  • PGC-1 α
  • Regeneration
  • Skeletal muscle

ASJC Scopus subject areas

  • Biochemistry
  • Physiology (medical)


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