The aim of this study was to compare the eff ect of eight weeks of body pumping exercises withand without melatonin supplementation on growth hormone, cortisol and sleep quality in adultgirls. In this regard, out of 55 adult girls, 50 were selected as volunteers. Then, 48 of them with anage range of 10 to 12 years and BMI (18 to 23 kg per square meter) were randomly divided intofour groups including body pump training group, body pump training and melatoninsupplementation, placebo group and control group. At the beginning and before the start of theresearch, all samples completed the personal satisfaction form in order to participate in theresearch. The device (body composition) was used to evaluate the body composition and theirfasting blood samples were taken by a specialist for relevant examinations. The training protocolconsisted of eight weeks and three sessions per week for 45 minutes with exercise overload and48 hours of rest. The intensity of the exercises based on the overload was added to the amount ofweights used and the variety of movements and speeding up the movements with the help ofmusic. Which will initially start with 20-25% 1RM and in the eighth week 40-45% 1RM. The programwill consist of 9 sections, each of which will last 4-5 minutes. Certain muscle groups will be used ineach section. The melatonin supplement was taken in such a way that the supplement groupreceived 3 mg of melatonin every night, 15 minutes before bedtime. Subjects in the supplementgroup all received the supplement at 21:30 and fell asleep at 22 (10 pm). Subjects were alsoinstructed to take supplements. After the exercises, the test (body composition) and bloodsampling were performed by a specialist and the necessary factors were measured in thelaboratory. The results of repeated measures analysis of variance showed that sleep quality,serum growth hormone level and serum cortisol level in the exercise + supplement group weresignifi cantly increased compared to the other groups and the fat percentage was signifi cantlyreduced.

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