Table 3. Venous plasma hormonal concentrations.

	Sea level	Altitude	p value
Insulin	4.7±0.4	7.7±1.1	<0.05
hGH	2.7±0.7	1.5±0.1	Ns
IGF-I	141±9	151±14	Ns
Testosterone	13.1±2.2	17.4±2.9	Ns
Cortisol	88.3±15.4	89.3±13.0	Ns

Venous plasma concentrations of insulin [µlU·mL⁻¹], human growth hormone [hGH; µlU·mL⁻¹], cortisol [ng·mL⁻¹], testosterone [pg·mL⁻¹], and insulin like growth factor-1 [ng·mL⁻¹] in male subjects at sea level and after 7–9 days exposure to high altitude. N = 9 and values are mean ± SEM.