Effects of acute androstenedione supplementation on testosterone levels in older men

Figures & data

Figure 1. The blood draw sequence.

Table 1. Characteristics of the EXP and CON groups (means ± SE).

Characteristics	EXP (n = 6)	CON (n = 5)
Age (yrs.)	62.33 ± 2.57	60.2 ± 1.02
Height (em.)	179.49 ± 0.03	177.80 ± 0.02
Weight (kg)	85.31 ± 3.56	80.59 ± 3.09
BMI (kg/m^2)	26.51 ± 1.36	25.55 ± 1.27

Table 2. Ten-repetition maximum (10-RM) and 50%, 70%, and 90% of 10-RM means for the EXP and CON groups (means ± SE).

Lift	EXP (n = 6)	CON (n = 5)
10-RM Leg extension (kg)	43.18 ± 3.05	38.18 ± 4.90
10-RM Leg curl (kg)	52.27 ± 4.35	50.0 ± 8.00
50% Leg extension (kg)	21.97 ± 1.82	20.91 ± 2.31
50% Leg curl (kg)	26.51 ± 2.17	26.36 ± 4.41
70% Leg extension (kg)	31.06 ± 1.82	27.27 ± 3.21
70% Leg curl (kg)	37.88 ± 3.46	35.45 ± 5.45
90% Leg extension (kg)	37,88 ± 2.79	34.55 ± 4.22
90% Leg curl (kg)	47.73 ± 4.35	44.55 ± 7.44

Table 3. Pre- to post-supplementation (between group) comparison of hormone levels for the EXP and CON groups (means ± SE).

	EXP (n = 6)		CON (n = 5)
	Pre	Post	Pre	Post
Testosterone (ng/mL)	4.36 ± 0.56	5.51 ± 0.35*	3.89 ± 0.57	3.82 ± 0.35
Estradiol (pg/mL)	15.95 ± 3.13	20.63 ± 2.67	14.71 ± 3.43	14.48 ± 2.92
Androstenedione (ng/mL)	0.88 ± 0.20	7.46 ± 1.25*	0.96 ± 0.20	0.95 ± 0.26

*p < 0.05

Figure 2. Serum testosterone (ng/mL) post-leg extension, leg curl and during recovery by group (placebo versus androstenedione).

Figure 3. Serum estradiol (ng/mL) post-leg extension, leg curl and during recovery by group (placebo versus androstenedione).