Mean total testosterone and free testosterone for very high volume runners, high volume runners, and controls
| Normal range | Very high volume | High volume | Controls | |
|---|---|---|---|---|
| Data are expressed as mean (SD) [range]. Normal range for hormone concentrations taken from Arce and De Souza.40 No significant differences observed between groups. | ||||
| n | 5 | 7 | 12 | |
| Total testosterone (nmol/l) | 10.4–38.2 | 15.1 (2.6) [12.9–19.6] | 22.8 (3.6) [21.0–30.8] | 18.2 (7.1) [12.2–37.0] |
| Free testosterone (pmol/l) | 50.0–130 | 54.4 (7.9) [48.0–68.0] | 69.0 (8.3) [58.0–80.0] | 73.7 (27.3) [36.0–117] |