Table 1
Mean ± SD of the sample (N = 11) for the dehydration trial.
| Variable | Baseline | Post-Dehydration | Change from baseline (%) | Pairwise p-value | Cohen's d effect size |
|---|---|---|---|---|---|
| Body mass (kg) | 78.0 ± 20.4 | 765 ± 20.2 | -2.0±0.6 | <0.001 | 2,71 |
| TBW (kg) | 48.9 ± 12.8 | 49.2 ± 12.5 | 0.9 ± 2.5 | 0.374 | 0.28 |
| FFM (kg) | 66.9 ± 17.7 | 67.1 ± 17.1 | 0.6 ± 2.5 | 0.617 | 0.16 |
| Body fat (%) | 14.1 ± 7.3 | 11.6 ± 8.1 | -24.6 ±23.6 | 0.004 | 1.11 |
| Z RA 20 kHz (Ω) | 306.2 ± 60.4 | 281.4 ± 48.4 | -7.7 ± 4.6 | 0.001 | 1.37 |
| Z LA 20 kHz (Ω) | 309.5 ±62.6 | 282.9 ± 50.1 | -8.2 ± 4.3 | <0.001 | 1.54 |
| Z RL 20 kHz (Ω) | 251.1 ± 33.6 | 232.1 ± 31.0 | -7.5 ± 4.2 | <0.001 | 1.82 |
| Z LL 20 kHz (Ω) | 250.6 ±33.8 | 230.4 ±29.1 | -7.9 ± 4.4 | < 0.001 | 1.70 |
| ZTR 20 kHz (Ω) | 21.1 ± 3.0 | 22.5 ± 3.1 | 6.9 ± 8.8 | 0.029 | 0.77 |
| Z RA 100 kHz (Ω) | 270.3 ± 57.3 | 246.8 ±46.1 | -8.2 ± 4.9 | 0.001 | 1.37 |
| Z LA 10D kHz (Ω) | 273.8 ± 59.7 | 249.4 ± 47.5 | -8.4 ± 4.9 | 0.001 | 1.42 |
| Z RL 100 kHz(Ω) | 219.0 ±31.7 | 202.7 ±28.8 | -7.3 ± 4.3 | <0.001 | 1.75 |
| Z LL 100 kHz (Ω) | 218.1 ± 31.7 | 200.9 ± 27.5 | -7.7 ± 4.3 | <0.001 | 1,71 |
| Z TR 100 kHz (Ω) | 17.1 ± 2.9 | 18.2 ± 3.1 | 6.6 ± 8.1 | 0.023 | 0.81 |
Table 2
Mean ± SD of the sample (N = 11) for the hyperhydration trial.
| Variable | Baseline | Post-Hyperhydration | Change from baseline (%) | Pairwise p-value | Cohen's d effect size |
|---|---|---|---|---|---|
| Body mass (kg) | 78.0 ± 20.6 | 78.9 ± 20.8 | 1.2 ± 0.2 | < 0.001 | 4.18 |
| TBW (kg) | 48,8 ± 12.7 | 49.0 ± 13.0 | 0.3 ± 09 | 0.240 | 0.38 |
| FFM (kg) | 66.7 ± 17.4 | 67.0 ± 17.9 | 0.3 ± 0.9 | 0.242 | 0.38 |
| Body fat (%) | 13.8 ± 8.4 | 14.7 ± 8.1 | 10.8 ± 15.6 | 0.024 | 0.80 |
| Z RA 20 kHz (Ω) | 309.6 ± 58.3 | 314.9 ± 64.7 | 1.4 ± 2.7 | 0.079 | 0.59 |
| Z LA 20 kHz (Ω) | 314,0 ± 60.1 | 318.3 ± 65.2 | 1.2 ± 2.7 | 0.149 | 0.47 |
| Z RL 20 kHz (Ω) | 252.8 ± 35.1 | 257.4 ± 43.3 | 1.5 ± 3.8 | 0.168 | 0.45 |
| Z LL 20 kHz (Ω) | 251.4 ± 35.5 | 255.8 ± 44.0 | 1.4 ± 4.0 | 0.195 | 0.42 |
| Z TR 20kHz(Ω) | 21.2 ± 3.3 | 20.9 ± 3.1 | -1.3 ± 2.7 | 0.099 | 0.55 |
| Z RA 100 kHz (Ω) | 272.2 ± 55.6 | 276.5 ± 60.8 | 1.3 ± 2.8 | 0.100 | 0.55 |
| Z LA 100 kHz (Ω) | 276.8 ± 57.3 | 280.3 ± 61.5 | 1.0 ± 2.7 | 0.179 | 0.44 |
| Z RL 100 kHz (Ω) | 220.5 ± 32.8 | 224.5 ± 39.2 | 1.5 ± 3.6 | 0.141 | 0.48 |
| Z LL 100 kHz (Ω) | 218.5 ± 32.9 | 222.5 ± 39.5 | 1.5 ± 3.5 | 0.131 | 0.50 |
| Z TR 100 kHz (Ω) | 16.9 ± 3.1 | 16.7 ± 3.1 | -1.5 ± 3.2 | 0.154 | 0.47 |
Fig.1
Changes from baseline in body mass (solid bars) and SMFBIA-estimated total body water (hashed bars) following A) dehydration and B) hyperhydration.