High volume endurance training history of the control (CON) and acquired training intolerance (ATI) athletes before and after the onset of symptoms
| Training history | CON (n = 17) | ATI (n = 18) | |
|---|---|---|---|
| Before | After | ||
| Values are mean (SD) (range). | |||
| ‡The training distances of the squash player, the rower, and the two cyclists were excluded from this analysis. | |||
| *p = 0.002, **p = 0.0003, ***p = 0.02 compared with the control group. | |||
| †p = 0.0003, ††p = 0.0002, †††p = 0.001 compared with before the onset of symptoms. | |||
| Age started high volume endurance training (years) | 27 (10) (12–47) | 27 (9) (13–44) | |
| Years of high volume endurance training | 13 (5) (4–22) | 12 (6) (3–25) | |
| Training (days/week) | 5 (1) (3–7) | 6 (1)* (4–7) | 4 (3)† (0–7) |
| Training (km/week)‡ | 50 (25) (15–130) | 87 (29)** (45–160) | 32 (34)†† (0–100) |
| Training (hours/week) | 5 (2) (2–13) | 9 (5)*** (3–24) | 3 (3)††† (0–9) |