Table 2.

Spectral analysis of the heart rate variability before and after RE and CTR trial.

	Baseline	20 min	80 min	24 h
Heart rate (bpm)
Control trial	62 ± 2	58 ± 2	58 ± 2	67 ± 1
Resistance exercise	64 ± 2	82 ± 2 ∗†	71 ± 1†	66 ± 1
Total power (ms 2)
Control trial	3210.95 ± 2559.83	3943.32 ± 2312.90	4655.87 ± 2940.15	1885.68 ± 1095.88
Resistance exercise	3050.01 ± 2082.16	772.59 ± 765.27 ∗†	2044.91 ± 1305.78 ∗†	2042.24 ± 967.75
LF (ms 2)
Control trial	1213.68 ± 910.16	1711.86 ± 1665.67	1968.06 ± 2397.95	863.02 ± 585.61
Resistance exercise	1240.59 ± 760.96	314.76 ± 367.01 ∗†	532.79 ± 248.99 ∗†	874.38 ± 429.65
HF (ms 2)
Control trial	588.08 ± 428.68	635.88 ± 470.38	940.03 ± 711.08	312.36 ± 292.73
Resistance exercise	520.36 ± 332.92	147.19 ± 166.96 ∗†	547.73 ± 1004.91	349.30 ± 242.97
LFn (n.u)
Control trial	69.31 ± 10.45	69.35 ± 10.65	63.36 ± 14.59	70.03 ± 16.43
Resistance exercise	65.90 ± 14.08	61.31 ± 17.05	61.66 ± 25.19	70.53 ± 10.69
HFn (n.u)
Control trial	28.63 ± 10.00	28.88 ± 10.13	34.47 ± 14.47	25.91 ± 13.77
Resistance exercise	29.68 ± 11.38	31.14 ± 11.38	32.30 ± 18.91	26.15 ± 9.72
SDNN (ms)
Control trial	62.9 ± 24	65.3 ± 35	74.5 ± 28	44.1 ± 29
Resistance exercise	61.9 ± 19	32.8 ± 24 ∗†	47.8 ± 16 ∗†	46.3 ± 23
PNN50
Control trial	17.4 ± 5.7	21.8 ± 5.9	25.4 ± 8.7	7.5 ± 4.0
Resistance exercise	16.2 ± 5.8	3.6 ± 2.6 ∗†	9.5 ± 4.3 ∗†	10.1 ± 4.7
RMSSD (ms)
Control trial	42.4 ± 18.4	46.8 ± 21.1	51.7 ± 19.7	28.0 ± 11.2
Resistance exercise	44.2 ± 19.0	19.3 ± 9.8 ∗†	31.3 ± 12.3 ∗†	30.6 ± 16.7

LF, low-frequency power; HF, high-frequency power; n.u. normalized units; SDNN, standard deviation of normal-to-normal; PNN50, proportion of differences in successive NN intervals >50 ms; RMSSD, square root of the mean squared successive differences in pulse interval.  ^∗p < 0.05versus baseline; †p < 0.05versus same moment of CTR trial.