Table 3.

Changes in testosterone, cortisol, testosterone/cortisol (T/C) ratio, insulin‐like growth factor‐1 (IGF‐1), IGF binging protein‐3 (IGFBP‐3), red blood cell (RBC), hemoglobin (Hb), and hematocrit (Hct) before (baseline), during (4 weeks), and after (8 weeks) the resistance training program

Variable	Baseline	4 weeks	8 weeks
Testosterone (ng/mL)
NRT	5.74 ± 0.93	5.32 ± 0.64	4.54 ± 0.79
HRT	3.98 ± 0.45	5.20 ± 0.33	4.65 ± 0.22
Cortisol (μg/dL)
NRT	14.4 ± 1.0	12.0 ± 1.5 **	9.3 ± 1.0 **
HRT	16.0 ± 1.7	11.4 ± 1.2 **	10.7 ± 1.0 **
T/C ratio
NRT	4.03 ± 0.65	5.32 ± 1.27 **	5.64 ± 1.42 **
HRT	2.87 ± 0.61	5.13 ± 0.92 **	4.66 ± 0.46 **
IGF‐1 (ng/mL)
NRT	234.4 ± 21.2	233.9 ± 22.3	232.4 ± 17.1
HRT	246.8 ± 24.9	261.1 ± 21.5	267.6 ± 21.9
IGFBP‐3 (ng/mL)
NRT	2.56 ± 0.10	2.46 ± 0.19	2.47 ± 0.19
HRT	2.19 ± 0.17	2.55 ± 0.16	2.67 ± 0.14
RBC (/L)
NRT	465.5 ± 51.1	498.4 ± 13.6	500.5 ± 8.1
HRT	495.0 ± 9.3	503.9 ± 8.6	494.2 ± 9.6
Hb (g/dL)
NRT	15.4 ± 0.3	15.3 ± 0.3	15.3 ± 0.3
HRT	14.8 ± 0.2	15.3 ± 0.2	15.0 ± 0.3
Hct (%)
NRT	47.7 ± 1.1	46.8 ± 1.0	46.5 ± 0.9
HRT	46.0 ± 0.6	46.4 ± 0.4	45.2 ± 0.7

NRT, normoxic resistance training; HRT, hypoxic resistance training.

Values are represented as means ± SE.

Significantly different from baseline: **P <0.01.