A glitch in the matrix: the pivotal role for extracellular matrix remodeling during muscle hypertrophy.
Level 5 - mechanism / opinion, no new human data
Narrative review synthesizing mechanistic research without new clinical trial or empirical human dataset
PubMed 35876284 · doi:10.1152/ajpcell.00200.2022
What was done
This narrative review synthesized recent evidence on how the extracellular matrix (ECM) and surrounding mononuclear cell populations (including fibrogenic cells, satellite cells, and immune cells) coordinate with muscle fibers to regulate skeletal muscle adaptation and hypertrophy following mechanical loading.
What was found
The abstract provides a qualitative summary and reports no specific numerical data or effect sizes. It describes that mechanical loading drives collagen production, turnover, and intercellular signaling, with the acellular collagen scaffold serving as both a mechanical signal transducer and a reservoir of growth factors necessary to support muscle fiber growth.
Why it matters
It emphasizes that muscle hypertrophy depends not only on the muscle fiber itself but on the structural and biochemical remodeling of the surrounding non-myogenic matrix environment.
Limits
The abstract contains no primary quantitative data, sample sizes, or specific study cohorts, representing purely mechanistic synthesis and theory.
Cited by
- context The first physiological response after a training stimulus is the synthesis of collagen to reinforce fascial connective tissue containers prior to adding muscle.