TABLE 3.
Association of athletic performance with vitamin D metabolites by multiple regression analyses* in outdoor players (n = 24).
| Total 25-(OH)D [ng/mL] | 24,25-(OH)2D3 [ng/mL] | 3-epi-25-(OH)D3 [ng/mL] | 1,25(OH)2D [pg/mL] | |||||
|---|---|---|---|---|---|---|---|---|
| Physical fitness test variables | ß (95% CI) | p-value | ß (95% CI) | p-value | ß (95% CI) | p-value | ß (95% CI) | p-value |
| VO2max (ml/kg/min) | 0.095 (−0.321–0.511) | 0.66 | 0.232 (−0.174–0.638) | 0.26 | 0.090 (−0.326–0.507) | 0.67 | −0.112 (−0.527–0.303) | 0.60 |
| Handgrip strength L (kg) | −0.049 (−0.466–0.369) | 0.82 | −0.062 (−0.479–0.355) | 0.77 | 0.061 (−0.356–0.478) | 0.78 | −0.152 (−0.565–0.261) | 0.47 |
| Handgrip strength R (kg) | 0.079 (−0.337–0.496) | 0.71 | 0.113 (−0.302–0.528) | 0.59 | 0.117 (−0.298–0.532) | 0.58 | −0.041 (−0.459–0.376) | 0.85 |
| Jump height (cm) | 0.314 (−0.124–0.753) | 0.16 | 0.265 (−0.180–0.711) | 0.24 | 0.359 (−0.072–0.790) | 0.10 | −0.077 (−0.538–0.383) | 0.74 |
| Peak force (N) | 0.339 (−0.096–0.774) | 0.13 | 0.303 (−0.137–0.744) | 0.18 | 0.444 (0.030–0.858) | 0.035 | −0.140 (−0.597–0.318) | 0.55 |
| Peak velocity (m/s) | 0.276 (−0.168–0.720) | 0.22 | 0.219 (−0.232–0.669) | 0.34 | 0.331 (−0.105–0.767) | 0.14 | −0.087 (−0.548–0.373) | 0.71 |
| Peak power (W) | 0.432 (0.015–0.848) | 0.042 | 0.312 (−0.127–0.751) | 0.16 | 0.492 (0.089–0.894) | 0.017 | −0.321 (−0.758–0.117) | 0.15 |
| RSImod (m/s) | 0.264 (−0.182–0.709) | 0.25 | 0.308 (−0.132–0.747) | 0.17 | 0.229 (−0.221–0.678) | 0.32 | −0.058 (−0.519–0.403) | 0.80 |
| Peak force (N/kg) | 0.118 (−0.341–0.577) | 0.61 | 0.188 (−0.266–0.641) | 0.42 | 0.311 (−0.128–0.750) | 0.16 | 0.128 (−0.330–0.586) | 0.58 |
| Peak power (W/kg) | 0.261 (−0.185–0.707) | 0.25 | 0.203 (−0.250–0.655) | 0.38 | 0.384 (−0.042–0.811) | 0.08 | −0.130 (−0.588–0.328) | 0.58 |
| Peak propulsive force/kg (N/kg) | 0.127 (−0.331–0.585) | 0.59 | 0.191 (−0.263–0.644) | 0.41 | 0.323 (−0.115–0.760) | 0.15 | 0.119 (−0.340–0.578) | 0.61 |
| AVG propulsive force/kg (N/kg) | 0.337 (−0.098–0.772) | 0.13 | 0.311 (-0.128–0.750) | 0.17 | 0.475 (0.068–0.881) | 0.022 | -0.042 (-0.503–0.420) | 0.86 |
| Peak propulsive power/kg (W/kg) | 0.274 (-0.170–0.718) | 0.23 | 0.214 (-0.237–0.665) | 0.35 | 0.395 (−0.030–0.819) | 0.07 | −0.142 (−0.599–0.316) | 0.54 |
| AVG propulsive power/kg (W/kg) | 0.316 (−0.122–0.754) | 0.16 | 0.260 (−0.186–0.706) | 0.25 | 0.432 (0.016–0.849) | 0.042 | −0.029 (−0.491–0.433) | 0.90 |
Statistically significant variables were adjusted for age, body mass, and body fat; ß, unstandardized coefficient; 95% CI, confidence interval; VDBP, vitamin D binding protein; VO2max, maximal oxygen uptake; L, left; R, right; CMJ, countermovement vertical jump; AVG, average. Bold values are statistically significant.