The three types of muscle fiber are slow oxidative (SO), fast oxidative (FO) and fast glycolytic (FG).
“SO”:- fibers use aerobic metabolism to produce low power contractions over long periods and are slow to fatigue.
“FO”:- fibers use anaerobic metabolism to produce ATP but produce higher tension contractions than “SO”fibers.
Research paper on measuring technique :- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3131401/
FIT BY ME 
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