Skip to main content

Table 2 Comparison of HRV measures and pulse harmonics between control group and TCC practitioners at baseline and 30 min after resting or TCC exercise

From: Increased first and second pulse harmonics in Tai Chi Chuan practitioners

Measures Baseline (n = 30) 30 min after (n = 30)
HRV Control TCC Control TCC
mRRI (ms) 873.8 (756.4–977.2) 917.4 (847.0–992.3) 929.4 (840.2–1082.0) 929.7 (854.8–996.4)
HR (bpm) 68.7 (61.4–79.3) 65.4 (60.5–70.8) 64.6 (55.4–71.4) 64.5 (60.2–70.2)
SDRR (ms) 53.7 (44.3–65.6) 43.8 (29.9–54.5)* 63.7 (53.2–71.5) 40.1 (30.3–52.7)**
CVRR (%) 5.9 (5.2–7.7) 4.4 (3.7–6.0)* 6.8 (5.8–7.1) 4.4 (3.3–5.8)**
TP (ms2) 1137 (692–1838) 749 (224–1344)* 17070 (968–2001) 609 (349–1083)**
ULFP (ms2) 108 (54–236) 114 (52–167) 195 (116–390) 108 (74–218)**
VLFP (ms2) 225 (110–401) 184 (123–305) 273 (196–438) 185.4 (119–213)**
LFP (ms2) 360 (187–512) 249 (63–462) 483.8 (292.4–657.9) 200.2 (98.0–367.7)**
HFP (ms2) 494 (325–665) 174 (57–582)* 662.0 (453.7–892.6) 178.8 (61.7–484.8)**
nVLFP (nu) 21.0 (15.6–25.9) 31.6 (18.6–55.9)* 21.3 (16.3–26.0) 29.2 (19.9–47.3)**
nLFP (nu) 29.1 (26.1–32.7) 24.5 (12.7–32.3)* 30.0 (27.3–35.6) 33.4 (25.6–39.7)
nHFP (nu) 49.8 (39.9–56.3) 35.2 (25.8–50.6)* 48.5 (39.6–56.1) 31.5 (22.1–45.3)**
LHR 0.61 (0.49–0.89) 1.04 (0.70–2.08)* 0.66 (0.49–0.78) 0.95 (0.62–2.15)**
Pulse harmonics Control TCC Control TCC
TPp 3460 (1791–8375) 17775 (12200–22360)* 3089 (818–7648) 19350 (13710–27240)**
Ph1 1741 (889–4346) 12580 (7856–16930)* 1114 (339–4249) 14605 (5554–19090)**
Ph2 301 (187–748) 1504 (1111–2243)* 213 (64–359) 1888 (1006–2680)**
Ph3 65 (33–256) 264 (209–394)* 45 (14–98) 288 (183–475)**
Ph4 20 (7–51) 63 (35–77)* 13 (4–29) 57 (31–90)**
Ph5 7.6 (3.7–18.0) 34.9 (20.6–69.3)* 5.4 (2.4–14.9) 47.2 (27.3–676.0)**
Ph6 1.6 (0.8–9.1) 15.5 (7.1–23.0)* 2.0 (0.9–15.1) 17.2 (8.3–31.2)**
Ph7 1.1 (0.4–3.3) 3.6 (2.4–5.9)* 1.2 (0.4–3.8) 3.3 (2.7–7.0)**
Ph8 0.5 (0.2–1.7) 1.7 (1.1–2.8)* 0.4 (0.2–2.0) 2.1 (0.9–3.2)**
nPh1 41 (30–69) 76 (58–82)* 38 (29–56) 78 (64–83)**
nPh2 9.6 (8.0–14.1) 10.3 (7.9–12.0) 6.5 (3.8–10.8) 10.5 (7.9–11.3)**
nPh3 1.9 (1.6–3.0) 1.7 (1.1–2.3) 1.8 (0.9–2.9) 1.6 (1.2–2.8)
nPh4 0.6 (0.3–1.0) 0.4 (0.2–0.5)* 0.4 (0.2–0.8) 0.3 (0.2–0.5)
nPh5 0.2 (0.2–0.4) 0.3 (0.2–0.4) 0.2 (0.1–0.4) 0.2 (0.2–0.3)
nPh6 0.06 (0.03–0.19) 0.11 (0.05–0.14) 0.1 (0.1–0.2) 0.1 (0.5–0.2)
nPh7 0.03 (0.01–0.08) 0.02 (0.01–0.04) 0.16 (0.02–0.09) 0.02 (0.01–0.04)**
nPh8 0.01 (0.01–0.04) 0.01 (0.01–0.02) 0.02 (0.01–0.05) 0.01 (0.01–0.02)**
F1 (Hz) 1.1 (1.0–1.3) 1.1 (1.0–1.2) 1.1 (0.9–1.2) 1.1 (1.0–1.2)
  1. *p < 0.05 vs. control group at baseline; ** p < 0.05 vs. control group 30 min after resting
  2. Values are numbers of patients or medians (25 % ~ 75 %). mRRI mean RR intervals; HR heart rate; SD RR standard deviation of RR intervals; CV RR coefficient of variation of RR intervals; TP total power; ULFP ultra low-frequency power; VLFP very low-frequency power; LFP low-frequency power; HFP high-frequency power; nVLFP normalized very low-frequency power; nLFP normalized low-frequency power; nHFP normalized high-frequency power; LHR low-/high- frequency power ratio; TPp total power of pulse in the power spectrum; nPhx normalized power of harmonic x; F1 frequency of the 1st harmonic