The response of serum growth hormone and prolactin to training in weight-maintaining healthy males.
Resting levels of serum growth hormone (GH) and prolactin (PRL) were measured pretraining, 3 weeks and 10 weeks posttraining in seven college age males. The exercise consisted of thrice weekly sessions at 70% VO2max for 20 minutes plus warmup and cool down. Body weight remained constant during the ten week training period. However, body fat decreased significantly. Resting daytime levels of GH decreased significantly with training while resting PRL levels were unchanged. The hormone responses suggest attenuation of resting GH levels with training and may relate to changes in body fat.
Hurley
R S
RS
School of Home Economics and Family Ecology, University of Akron, Ohio.
Bossetti
B M
BM
O'Dorisio
T M
TM
Welch
M A
MA
Rice
R R
RR
Tenison
E B
EB
Wasson
C J
CJ
Malarkey
W B
WB
D000273:Adipose Tissue / Q000378:metabolism; D000328:Adult; D001823:Body Composition; D001835:Body Weight; D015444:Exercise / Q000502:physiology*; D013006:Growth Hormone / Q000097:blood*; D006801:Humans; D008297:Male; D010806:Physical Education and Training / Q000379:methods*; D011388:Prolactin / Q000097:blood*
D011388:Prolactin; D013006:Growth Hormone