Table 4.
Agreement between devices in: RR (ip), PLF (n) and PHF (n). CCC mean and percentage of subjects not reaching excellent agreement for each segment.
| SREST | SCY60 | SCY70 | SCY80 | SREC | ||
|---|---|---|---|---|---|---|
| Whole sample (n = 67) |
RR (ip) | 0.9929 (1%) | 0.9560 (6%) | 0.9467 (13%) | 0.9319 (16%) | 0.9612 (14%) |
| PLF (n) | 0.9885 (1%) | 0.9713 (4%) | 0.9677 (9%) | 0.9106 (19%) | 0.8251 (30%) | |
| PHF (n) | 0.9813 (3%) | 0.9494 (13%) | 0.8858 (27%) | 0.6661 (60%) | 0.5262 (75%) | |
| CLUSTER A (n = 19) |
RR (ip) | 0.9970 (0%) | 0.9844 (0%) | 0.9472 (21%) | 0.9243 (21%) | 0.9778 (6%) |
| PLF (n) | 0.9999 (0%) | 0.9990 (0%) | 0.9911 (5%) | 0.9169 (16%) | 0.7440 (47%) | |
| PHF (n) | 0.9982 (0%) | 0.9645 (16%) | 0.9316 (11%) | 0.7970 (37%) | 0.4859 (88%) | |
| CLUSTER B (n = 13) |
RR (ip) | 0.9828 (8%) | 0.8996 (15%) | 0.8690 (23%) | 0.9258 (23%) | 0.9473 (15%) |
| PLF (n) | 0.9423 (8%) | 0.8544 (23%) | 0.9757 (8%) | 0.8601 (15%) | 0.8838 (15%) | |
| PHF (n) | 0.9284 (8%) | 0.8710 (23%) | 0.9112 (23%) | 0.7455 (62%) | 0.7402 (54%) | |
| CLUSTER C (n = 18) |
RR (ip) | 0.9943 (0%) | 0.9363 (11%) | 0.9665 (11%) | 0.9035 (22%) | 0.9615 (12%) |
| PLF (n) | 0.9990 (0%) | 0.9998 (0%) | 0.9792 (6%) | 0.9164 (28%) | 0.7791 (31%) | |
| PHF (n) | 0.9909 (6%) | 0.9670 (6%) | 0.8906 (28%) | 0.5914 (67%) | 0.3843 (88%) | |
| CLUSTER D (n = 17) |
RR (ip) | 0.9945 (0%) | 0.9884 (0%) | 0.9844 (0%) | 0.9751 (0%) | 0.9541 (24%) |
| PLF (n) | 0.9999 (0%) | 0.9996 (0%) | 0.9233 (18%) | 0.9361 (18%) | 0.9045 (24%) | |
| PHF (n) | 0.9929 (0%) | 0.9739 (12%) | 0.8100 (47%) | 0.5381 (76%) | 0.5366 (65%) |
Values are expressed as CCC mean and (percentage of subjects under 0.9 threshold). Segments are based on the test phases: resting (SREST), cycling (SCY) and recovery (SREC). SCY was divided in three stages at 60, 70 and 80% of HRmax, denoted as SCY60, SCY70 and SCY80 respectively. The characteristics of each cluster were the following: CLUSTER A = high fitness; CLUSTER B = low fitness and low age; CLUSTER C = low fitness, high age and medium trunk fat percentage; CLUSTER D = low fitness, high age and high trunk fat percentage. RR (ip) = paired RR interval series; PLF (n) = instantaneous low-frequency power; PHF (n) = instantaneous high-frequency power.