Table 2.
Baseline Exercise Variables Stratified by Body Mass Index Categories.
| Underweight N = 10 |
Normal weight N = 448 |
Over- weight N = 724 |
Obese I N = 551 |
Obese II N = 330 |
Obese III N = 261 |
Pearson’s r coef.** |
|
|---|---|---|---|---|---|---|---|
| Peak VO2 (mL/ min) |
655 (628, 921) |
962 (772, 1205) |
1278 (981, 1575) |
1439 (1071, 1763) |
1523 (1242, 1858) |
1676 (1279, 2117) |
0.40 |
| Peak VO2 (mL/kg/min) |
15.4 (11.8, 18.3) |
14.4 (11.6, 18.0) |
15.1 (12.4, 18.4) |
15.0 (11.2, 17.8) |
13.9 (11.3, 16.6) |
12.4 (10.1, 15.9) |
−0.17 |
| VO2 at VT (mL/kg/min) |
13.0 (10.0, 13.6) |
10.9 (9.3, 13.0) |
10.8 (9.3, 12.6) |
10.7 (8.7, 12.7) |
10.0 (8.4, 11.6) |
9.5 (8.1, 11.4) |
−0.18 |
| Peak respiratory exchange ratio |
1.12 (1.00, 1.21) |
1.09 (1.02, 1.17) |
1.10 (1.03, 1.17) |
1.09 (1.02, 1.16) |
1.08 (1.02, 1.14) |
1.07 (1.00, 1.13) |
−0.12 |
| O2 pulse (mL/ kg/beat) |
0.13 (0.12, 0.15) |
0.13 (0.10, 0.16) |
0.13 (0.11, 0.15) |
0.13 (0.10, 0.15) |
0.11 (0.10, 0.13) |
0.10 (0.08, 0.12) |
−0.27 |
| VE/VCO2 | 36 (33, 42) | 36 (30, 43) |
33 (29, 37) |
32 (29, 37) |
30 (27, 35) |
29 (25, 34) |
−0.25 |
| Exercise time (min) |
7.1 (6.0, 10.5) |
9.4 (6.7, 12.0) |
10.3 (8.0, 13.0) |
9.8 (7.1, 12.0) |
9.1 (6.6, 11.6) |
8.0 (5.7, 10.3) |
−0.15 |
| 6 minute walk distance (m) |
362 (269, 402) |
366 (296, 430) |
387 (317, 446) |
372 (297, 443) |
362 (294, 426) |
335 (274, 407) |
−0.12 |
| HR at peak exercise (beats/min) |
123 (94, 139) | 115 (98, 131) |
119 (105, 132) |
120 (103, 133) |
122 (108, 136) |
123 (111, 141) |
0.13 |
Data are recorded as median (interquartile range) for continuous variables and % total for categorical variables.
*
underweight (BMI< 18.5 kg/m2), normal weight (BMI 18.5 – 24.9 kg/m2), overweight (BMI 25.0 – 29.9 kg/m2), obese I (BMI 30 – 34.9 kg/m2), obese II (BMI 35–39.9 kg/m2), obese III (BMI ≥ 40 kg/m2)
**
Pearson's r correlation coefficient for all of the continuous variables correlated with BMI as a continuous variable. All r values are significant at the p < 0.0001 level.