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Table 2 Characteristics of athletes with insufficient (< 30 ng/mL) and sufficient (≥ 30 ng/mL) serum 25-OH vitamin D concentrations

From: Influence of 25-Hydroxy-Vitamin D Insufficiency on Maximal Aerobic Power in Elite Indoor Athletes: A Cross-Sectional Study

Characteristics Insufficient Sufficient p value
(< 30 ng/mL) (≥ 30 ng/mL)
n = 34 n = 78
Mean ± SD Mean ± SD
Serum 25-OH vitamin D (ng/mL) 21.9 ± 5.9 41.6 ± 8.6 < 0.001
Age (years) 27.4 ± 5.9 25.6 ± 4.8 0.13
Weight (kg) 93.5 ± 11.1 92.6 ± 10.6 0.66
Height (cm) 190.0 ± 8.1 189.4 ± 7.2 0.71
Body mass index (kg/m2) 25.8 ± 1.5 25.8 ± 1.9 0.81
Training time per week (h) 16.2 ± 3.7 17.2 ± 3.4 0.28
Professional training (years) 10.23 ± 5,8 9.82 ± 5 0.77
Parathyroid hormone (ng/mL) 40.5 ± 16.0 32.0 ± 18.2 0.02
Calcium (mmol/l) 2.3 ± 0.14 2.4 ± 0.1 0.14
Hemoglobin (g/dl) 14.8 ± 1.0 15.0 ± 0.9 0.40
Hematocrit (%) 42.5 ± 2.4 42.6 ± 2.3 0.86
Ferritin (ng/ml) 108.0 ± 52.5 139.5 ± 73.3 0.05
Magnesium (mmol/l) 0.82 ± 0.07 0.82 ± 0.05 0.98
Maximal aerobic power (w/kg) 3.5 ± 0.8 3.9 ± 0.9 0.03
Maximal workload (watt max.) 330.9 ± 85.7 363.1 ± 94.0 0.08
Heart rate at rest (bpm) 58.5 ± 8.6 58.8 ± 10.9 1.00
Maximum heart rate (bpm) 175 ± 16.4 176.9 ± 10.0 0.62
Systolic blood pressure at rest (mmHg) 119.1 ± 11.4 120.1 ± 8.3 0.58
Diastolic blood pressure at rest (mmHg) 80.2 ± 7.2 74.7 ± 6.9 0.004
Max. systolic blood pressure (mmHg) 186.3 ± 18.7 193.7 ± 21.2 0.14
Max. diastolic blood pressure (mmHg) 86.8 ± 6.7 87.3 ± 9.9 0.79
LVEF (%; echocardiography) 66.5 ± 4.7 65.5 ± 4.6 0.40
Stroke volume (ml, echocardiography) 84.0 ± 17.5 87.5 ± 17.4 0.51
  1. Values are specified as means ± standard deviation (SD)
  2. Significant difference (p < 0.05)
  3. W = watt, max. = maximum, bpm = beats per minute, LVEF = left ventricular ejection fraction