Period I | Period II | Period III | |
---|---|---|---|
24 Hour RR interval variability | |||
RR means (ms) | 1047 (33) | 1015 (28) | 1063 (39) |
SDNN (ms) | 158 (9) | 185 (31) | 154 (9) |
1n ULF | 9.88 (0.12) | 9.84 (0.13) | 9.83 (0.13) |
1n VLF | 7.27 (0.18) | 7.34 (0.14) | 7.27 (0.16) |
1n LF | 6.49 (0.18) | 6.49 (0.16) | 6.38 (0.19) |
1n HF | 6.06 (0.15) | 5.86 (0.18) | 5.75 (0.19) |
Short term RR interval variability | |||
Supine rest | |||
RR mean (ms) | 1108 (26) | 1100 (32) | 1078 (29) |
SDNN (ms) | 34 (2) | 40 (3) | 33 (2) |
LF/HF ratio | 1.01 (0.21) | 1.32 (0.22) | 1.63 (0.39) |
Head up tilt | |||
RR mean (ms) | 1071 (29) | 1073 (32) | 1053 (30) |
SDNN (ms) | 36 (2) | 35 (3) | 34 (2) |
LF/HF ratio | 2.12 (0.49) | 1.86 (0.46) | 2.08 (0.59) |
Mental stress | |||
RR means (ms) | 1060 (23) | 1084 (31) | 1092 (31) |
SDNN (ms) | 30 (2) | 31 (3) | 33 (2) |
LF/HF ratio | 1.66 (0.36) | 2.14 (0.49) | 2.06 (0.54) |
Exercise test | |||
Exercise duration (min) | 9.60 (0.54) | 10.40 (0.57) | 10.60 (0.62)3-150 |
Maximum work load (W) | 93 (3.5) | 98 (3.8) | 99 (4.1)3-150 |
PeakV˙o 2(ml/min) | 1396 (58) | 1462 (61) | 1505 (63)3-150 |
BRS (ms/mm Hg) | 9.8 (0.86) | 11.5 (1.24) | 12.2 (1.84) |
Noradrenaline (pg/ml) | 499 (66.2) | 478 (39.3) | 483 (48.4) |
Adrenaline (pg/ml) | 0.424 (0.063) | 0.429 (0.058) | 0.603 (0.097) |
Values are means (SEM).
↵3-150 p < 0.05 between periods I and III.
SDNN, standard deviation of all normal RR values; ULF, ultra low frequency power; VLF, very low frequency power; LF, low frequency power; HF, high frequency power; 1n, natural logarithm; BRS, baroreflex sensitivity; V˙o 2, oxygen uptake.