Effects of exercise on the serum concentrations of FSH, LH, progesterone, and estradiol

Abstract

The effects of 30 min of exercise (74.1±3.0% (VO₂), on the responses of progesterone (P), estradiol (E₂), follicle stimulating hormone (FSH), and luteinizing hormone (LH) were investigated in 10 women. With such exercise significant increments occurred in P (37.6±9.5%) and E₂ (13.5±7.5%) (p0.05). Exercise in the luteal phase and during menses provoked similar changes in P, but E₂ concentrations remained unchanged when exercise occurred during menses (p>0.05). With 8–11 weeks of training the menstrual cycles were quite irregular and retesting of subjects in the same phase of the cycle was not possible. Yet, when subjects were retested after training, no changes occurred in P, E₂ or LH (p>0.05) but a decrement did occur in FSH (p<0.10). Thus, heavy exercise in untrained subjects provokes significant increments in ovarian hormones, whereas no such increments are observed in trained subjects exercising at the same absolute workload.