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Table 1 The demographic data and baseline biomarker concentrations of college students and athletes performing strength training; data are expressed as Mean (SD)

From: Serum reference value of two potential doping candidates—myostatin and insulin-like growth factor-I in the healthy young male

  Control Athlete P value*
All athletes Basketball Weight lifting
N 29 28 18 10  
Age (year) 21.2 (1.6) 20.5 (1.2) 20.6 (1.3) 20.6 (1.2) 0.083
Height (cm) 174 (6) 181 (8) 185 (7)** 173 (4) 0.002
Weight (kg) 69.0 (8.9) 88.3 (15.2) 90.0 (15.4) 85.3 (15.2) <0.001
BMI (kg/m2) 22.5 (2.4) 26.9 (4.1) 26.0 (3.5) 28.4 (4.8) <0.001
Fat mass (%) 13.1 (4.4) 18.2 (9.1) 16.6 (8.1) 21.2 (10.4) 0.011
Fat-free mass (kg) 59.7 (6.1) 71.2 (7.7) 74.1 (7.2)** 65.9 (5.6) <0.001
Muscle mass (kg) 27.8 (3.5) 34.3 (4.3) 35.7 (4.2)** 31.8 (3.4) <0.001
Waist girth (cm) 80.2 (7.2) 89.9 (10.8) 90.0 (10.3) 89.5 (12.0) <0.001
Grip strength (kg) 42.9 (4.4) 48.5 (6.1) 46.5 (5.6)** 52.1 (5.4) <0.001
Myostatin (ng/mL) 12.4 (3.5) 12.1 (3.7) 12.6 (3.9) 11.2 (3.3) 0.740
IGF-1 (ng/ml) 263 (134) 324 (80) 318 (82) 334 (80) 0.043
Estimated daily energy expenditure (kcal/day) 3059 (1123) 4152 (813) 4216 (794) 4036 (877) <0.001
  1. *denotes p value of t-test between control and all athletes
  2. **denotes significance of Wilcoxon rank-sums test between basketball and weight-lifting teams