Table 1.
Participant characteristics
| Young | Older sedentary | Older casual | Older committed | Older athletic | ANOVA p value |
|
|---|---|---|---|---|---|---|
| Participant number, %F | 26 (65) | 28 (46) | 25 (36) | 25 (20) | 25 (32) | |
| Age, years | 40.5 (33.4 - 46.1) | 66.8 (63.2 - 71.0)* | 69.4 (67.4 - 73.8)* | 68.4 (65.2 - 70.7)* | 67.8 (65.7 - 69.2)* | <0.001# |
| Weight, kg | 69.5 ± 13.6 | 69.7 ± 13.3 | 75.8 ± 14.1 | 73.5 ± 11.1 | 65.6 ± 12.1 | 0.058 |
| BSA, m2 | 1.80 ± 0.21 | 1.89 ± 0.19 | 1.90 ± 0.23 | 1.88 ± 0.17 | 1.76 ± 0.21† | 0.060 |
| 24-h systolic BP, mmHg | 121.5 ± 9.0 | 125.0 ± 8.6 | 124.0 ± 6.9 | 124.8 ± 7.9 | 121.5 ± 11.1 (13) | 0.470 |
| 24-h diastolic BP, mmHg | 71.5 ± 5.4 | 72.0 ± 6.5 | 71.1 ± 5.5 | 73.5 ± 6.7 | 73.8 ± 5.6 (13) | 0.525 |
| V̇O2max, ml/kg/min | 28.3 ± 6.1 | 24.0 ± 5.1* | 25.6 ± 4.7 | 32.0 ± 5.9†‡ | 39.5 ± 5.3*†‡ | <0.001 |
| LVMI, g/m2 | 53.1 ± 11.6 (24) | 50.3 ± 8.3 (27) | 51.6 ± 8.2 (22) | 61.7 ± 11.1*†‡ (23) | 67.2 ± 11.8*†‡ (25) | <0.001 |
| LV mass-to-volume ratio, g/ml | 0.82 (0.73 - 0.93) | 0.83 (0.79 - 0.91) | 0.87 (0.77 - 1.05) | 0.88 (0.77 - 1.04) | 0.89 (0.83 - 1.01) | 0.394# |
Values are expressed as mean ± SD except age and LV mass-to-volume ratio expressed as (median, 25 - 75%). Number in parenthesis represents number of observations if different from the total group. BP, blood pressure; V̇O2max, maximal oxygen uptake; LVMI, left ventricular mass index.
#
Kruskal-Wallis 1-way ANOVA on ranks
*
p <0.05 versus young
†
p <0.05 versus older sedentary
‡
p <0.05 versus older casual. P-values are derived from post-hoc tests (Tukey’s method for BSA, V̇O2and LVMI and Dunn’s method for age).