Association of age-related decrease in intracellular-to-total water ratio with that in explosive strength of the plantar flexors: a cross-sectional study

Table 3 Partial correlation coefficients of explosive muscle strength with influencing factors (n = 59)

	Explosive muscle strength
	RTD_0–50		RTD_50–100		RTD_100–200		nRTD_0–50		nRTD_50–100		nRTD_100–200
	r_p	P	r_p	P	r_p	P	r_p	P	r_p	P	r_p	P
Maximal muscle strength
PT_MVC	0.539	< 0.001	0.644	< 0.001	0.860	< 0.001	−	−	−	−	−	−
Twitch contractile properties
PT_twitch	0.480	< 0.001	0.522	< 0.001	0.525	< 0.001	0.252	0.056	0.307	0.019	0.199	0.135
RTD_twitch	0.531	< 0.001	0.558	< 0.001	0.481	< 0.001	0.311	0.017	0.352	0.007	0.177	0.185
TPT_twitch	−0.361	0.005	−0.313	0.017	−0.080	0.551	−0.312	0.017	−0.272	0.039	−0.021	0.875
Neuromuscular activities
nRMS-RTD_0–50	0.607	< 0.001	−	−	−	−	0.648	< 0.001	−	−	−	−
nRMS-RTD_50–100	−	−	0.569	< 0.001	−	−	−	−	0.624	< 0.001	−	−
nRMS-RTD_100–200	−	−	−	−	0.527	< 0.001	−	−	−	−	0.557	< 0.001

MVC maximal voluntary contraction, nRMS normalized root mean square, nRTD normalized rate of torque development, PT peak torque, RTD rate of torque development, TPT time-to-peak torque, VA voluntary activation

ISSN: 1880-6805