Does vitamin D affect strength and speed characteristics and testosterone concentration in elite young track and field athletes in the North European summer?

Table 2 Vitamin D status in athletes

Vitamin D	All n (%)	Male n (%)	Female n (%)
Deficient (below 20 ng/ml)	4 (5.9%)	2 (8.7%)	2 (4.4%)
Insufficient (20-30 ng/ml)	19 (27.9%)	4 (17.4%)	15 (33.3%)
Normal (above 30 ng/ml)	45 (66.2%)	17 (73.3%)	28 (62.3%)

ISSN: 1475-2891