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Table 1 Average serum concentrations of testosterone, human growth hormone (hGh), and insulin-like growth factor-1 (IGF-1)

From: The effects of six weeks of supplementation with multi-ingredient performance supplements and resistance training on anabolic hormones, body composition, strength, and power in resistance-trained men

Variable Group PRE POST time group × time
Testosterone MIPS (n = 11) 40.2 ± 12.9 58.3 ± 11.5 p = 0.035 p = 0.881
(ng/mL) PLA (n = 7) 38.9 ± 10.3 54.9 ± 12.4
hGH MIPS (n = 12) 113.3 ± 21.0 119.9 ± 35.3 p = 0.510 p = 0.376
(pg/mL) PLA (n = 7) 71.9 ± 20.6 64.5 ± 13.1
IGF −1 MIPS (n = 11) 173.2 ± 7.5 181.9 ± 10.5 p = 0.768 p = 0.283
(ng/mL) PLA (n = 10) 152.9 ± 14.9 147.5 ± 28.4   
  1. A main time effect was observed for both groups to improve serum testosterone, with no difference between groups. Values are presented as means ± SE. Sample size between each analyte is slightly different due technical difficulties with certain samples.