Table 3.

Correlation between HRV and physical parameters.

	6MWT	TUG	Strength	Flexibility
Mean HR	−0.198	0.018	−0.173	0.071
Mean RR	0.215	−0.014	0.172	−0.099
SDNN	0.058	0.068	−0.301	0.058
RMSSD	0.148	0.130	−0.227	0.148
LF (%)	−0.027	−0.044	−0.134	0.151
LF (n.u.)	−0.057	−0.012	−0.121	0.044
HF (%)	0.090	−0.007	0.097	−0.018
HF (n.u.)	0.058	0.025	0.119	−0.043
Total power	0.025	−0.014	−0.153	0.018
LF/HF	−0.074	−0.015	−0.118	0.069
SD1	0.157	0.123	−0.218	0.138
SD2	0.031	−0.003	−0.231	−0.054
SD1/SD2	−0.164	0.054	0.063	−0.150

no correlation was statistically significant.