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Table 2 Comparision of the parameters for HRV in the subjects

From: Effect of long term high altitude exposure on cardiovascular autonomic adjustment during rest and post-exercise recovery

  Resting Recovering
Variable Highlanders Lowlanders Highlanders Lowlanders
Time domain
 SDNNb 56.6(43–71.9) 50.8(35.1–80.7) 80.3(54.2–99.8) 62.7 (50.7–79)
 RMSSDc 47.3 (36.5–69) 37.9 (31.6–81.6) 48 (32.6–85.6) 32.2 (23.5–53.3)
 NN50c 63 (36–142) 63 (32–115) 81 (35–138) 27(11–75)
 pNN50%c 17.6(8.9-41.3) 18 (9–39) 22 (9.6–40.4) 6.3 (2.3–17.4)
Frequency domain
 LF powera 720 (450–1162) 763 (328–1262) 758 (446–2005) 383 (182–740)
 HF powerc 684(273–1268) 498 (278–1035) 487 (206–2048) 208 (63–798)
 LF 56.1 (43.3–62.9) 54.5 (37.9–69.5) 56.7 (46.7–74.5) 63.9 (46.8–75.9)
 HF 43.9 (37.1–56.7) 45.5 (30.5–62.1) 43.3 (25.5–53.3) 36.1 (24.1–53.2)
 Total powera 2659(1397–4528) 2199(1453-6124) 3662 (2232–6380) 1862 (860–3699)
 LF/HFb 1.28 (0.76–1.69) 1.30 (0.71–2.28) 1.18 (.87–2.92) 1.77 (0.88–3.14)
  1. asignificant different in HRV during recovery between highlanders and lowlanders
  2. bsignificant different in highlanders between resting and recovery
  3. csignificant different in lowlanders between resting and recovery
  4. Bold numbers indicate that the values are statistically significant