Rarick, K. R., Tuckow, A. P., Alemany, J. A., Staab, J. S., Welsh, T. T., Sharp, M. A., Kellog, M. D., & Nindl, B. C. (2005). Exercise mode and volume differentially affect growth hormone and luteinizing hormone secretion patterns. Medicine and Science in Sports and Exercise, 37(5), Supplement abstract 1855.

Untrained men (N = 8) randomly performed each of five conditions separated by at least one month. The conditions were 1) a no-exercise control, 2) high volume resistance exercise, 3) moderate volume resistance exercise, 4) high volume aerobic exercise, and 5) moderate volume aerobic exercise. Blood samples were obtained every 20 minutes after exercise for 20 hours.

Total growth hormone was increased after aerobic exercise. Luteinizing hormone was significantly decreased after aerobic exercise. Resistance exercise did not alter any parameters.

Implication. Growth hormone and luteinizing hormone secretions were only affected by aerobic exercise.

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