St Clair Gibson, A, Lambert, M L, Noakes, T D · Sports medicine (Auckland, N.Z.) · 2001 · DOI
This review challenges the common belief that muscle fatigue during exercise comes only from chemical changes in muscles themselves. Instead, the authors propose that the brain and nervous system actively control and limit how hard we can exercise to protect our bodies from damage. Interestingly, they note that people with ME/CFS experience fatigue even at rest, suggesting fatigue may be a protective signal from the nervous system rather than a simple muscle problem.
This work offers a theoretical framework suggesting ME/CFS fatigue may reflect dysregulation of central nervous system control mechanisms rather than primary muscle dysfunction. Understanding fatigue as a neural regulatory signal rather than muscle failure could redirect research toward investigating brain-mediated control systems and inform treatment approaches for ME/CFS.
This review does not provide empirical evidence that ME/CFS fatigue is specifically caused by central nervous system dysfunction; it is a theoretical framework. The study does not measure actual neural outputs, metabolite levels, or ATP in ME/CFS patients, so it cannot establish causation in ME/CFS specifically. The analogy between normal exercise fatigue and pathological ME/CFS fatigue remains to be empirically validated.
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
Spotted an error in this entry? Report it →