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Table 1 Parameters of muscle strength assessed by handgrip measurements

From: Hand grip strength and fatigability: correlation with clinical parameters and diagnostic suitability in ME/CFS

Parameter/Ratio Formula Explanation
Fmax Fmax [kg] Maximum grip strength within one session (ten repeat trials)
Fmean \(\frac{\sum 10\mathrm{ pulls }}{10}\) Mean grip strength of all ten trials
Fatigue ratio (assessment of fatigability) \(\frac{\mathrm{Fmax}}{\mathrm{Fmean}}\) Higher values indicate stronger decrease of force during one session
Recovery ratio (assessment of recoverability) \(\frac{\mathrm{Fmean}2}{\mathrm{ Fmean}1}\) Low values indicate impaired recovery