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 2 Partial correlation coefficients (r_p) of variables of segmental bioelectrical impedance spectroscopy with neuromuscular properties (n = 59)

	S-BIS variables
	ICW		ICW/TW
	r_p	P	r_p	P
Explosive muscle strength
RTD_0–50	0.336	0.010	0.377	0.004
RTD_50–100	0.364	0.005	0.397	0.002
RTD_100–200	0.419	0.001	0.408	0.001
nRTD_0–50	0.169	0.204	0.311	0.017
nRTD_50–100	0.225	0.090	0.354	0.006
nRTD_100–200	0.247	0.062	0.304	0.020
Maximal muscle strength
PT_MVC	0.460	< 0.001	0.378	0.003
Twitch contractile properties
PT_twitch	0.646	< 0.001	0.504	< 0.001
RTD_twitch	0.654	< 0.001	0.567	< 0.001
TPT_twitch	−0.276	0.036	−0.392	0.002
Neuromuscular activities
VA	0.196	0.141	0.111	0.407
nRMS-MVC	−0.033	0.803	0.031	0.818
nRMS-RTD_0–50	−0.015	0.914	−0.005	0.973
nRMS-RTD_50–100	−0.027	0.840	0.029	0.830
nRMS-RTD_100–200	−0.045	0.735	0.023	0.862

ICW intracellular water, 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