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Table 2 Inclusion characteristics. Baseline characteristics (Mean ± SD) of young and elderly subjects in vitamin-D and placebo group, respectively

From: Does vitamin-D intake during resistance training improve the skeletal muscle hypertrophic and strength response in young and elderly men? – a randomized controlled trial

Young men Vitamin-D (n = 7) Placebo (n = 10) Group difference (p-value)
 Age, years 23.3 ± 2.0 22.4 ± 1.8 0.39
 Height, cm 181.6 ± 6.3 181.1 ± 5.5 0.85
 Weight, kg 77.9 ± 11.4 75.6 ± 9.1 0.66
 Body mass index, kg/m2 23.6 ± 3.6 23.0 ± 2.3 0.69
 CSA, cm2 57.9 ± 9.7 59.0 ± 4.8 0.78
 Isometric muscle strength, Nm 215.6 ± 30.7 209.5 ± 30.5 0.71
 Strength/CSA, Nm/cm2 3.82 ± 0.92 3.55 ± 0.47 0.45
Elderly men Vitamin-D (n = 7) Placebo (n = 10) Group difference (p-value)
 Age, years 67.1 ± 2.9 66.6 ± 4.2 0.78
 Height, cm 178.5 ± 1.9 178.8 ± 6.7 0.93
 Weight, kg 84.8 ± 5.7 80.4 ± 9.3 0.32
 Body mass index, kg/m2 26.6 ± 1.8 25.1 ± 1.1 0.11
 CSA, cm2 53.7 ± 2.7 47.0 ± 7.3 0.047
 Isometric muscle strength, Nm 154.6 ± 22.0 168.3 ± 35.3 0.41
 Strength/CSA, Nm/cm2 2.89 ± 0.45 3.46 ± 0.49 0.03