Exercise Physiology
Hafez Eynavi; Aboalhamid habibi; Rouhollah Ranjbar; Mohammad Rami
Abstract
Aim: Resistance exercise is Effective factor that stimulate anabolic and catabolic hormones. The ingestion of sport supplements before resistance exercise can affect the hormonal responses. The purpose of this study was to examine the ingestion of a pre-workout supplement and resistance exercise on hormonal ...
Read More
Aim: Resistance exercise is Effective factor that stimulate anabolic and catabolic hormones. The ingestion of sport supplements before resistance exercise can affect the hormonal responses. The purpose of this study was to examine the ingestion of a pre-workout supplement and resistance exercise on hormonal responses.Methods: In a randomized, double-blind, placebo-controlled, and crossover design, sixteen male physical education students (age: 22.9±1.7yr, weight: 67.8±4.0 kg, and BMI: 23.1±1.7 kgm2/) completed two resistance exercise sessions with one week washout period between each session. Participants consumed supplement or placebo 30 minutes before exercise. The supplement was a single scoop (6.5 g) of the C4 pre-workout (cellucor company), and the placebo was 6.5 g maltodextrin. Blood samples were taken before, immediately post, and after 1 hour pos-exercise to analyze growth hormone, testosterone, cortisol, and blood lactate. For analysis of data were used the repeated-measures ANOVA and Bonferroni tests.Results: The results had shown that there were no significant differences in acute responses of testosterone, cortisol, and blood lactate immediately post and one hour after resistance exercise between placebo and supplement conditions (p>0.05). However, the rise of growth hormone after exercise was higher in supplement condition than placebo condition (p<0.025).Conclusion: According to the results of this study, the C4 supplement has no effective response on reducing lactate accumulation due to resistance exercise and has no consequence on buffering system, but can increase growth levels according to the enhancement of anabolic conditions in the body.
Exercise Physiology
mina shakhi; Aboalhamid habibi; aliakbar alizadeh
Abstract
Introduction and purpose: The purpose of this research is to investigate the effect of exercise (resistance-aerobic) on the levels of IGFBP3, IGF1, and BMI in obese wome .Materials and methods: For this purpose, 24 inactive obese women aged 25 to 37 years with a BMI of 30 to 35 kg/m2 were randomly divided ...
Read More
Introduction and purpose: The purpose of this research is to investigate the effect of exercise (resistance-aerobic) on the levels of IGFBP3, IGF1, and BMI in obese wome .Materials and methods: For this purpose, 24 inactive obese women aged 25 to 37 years with a BMI of 30 to 35 kg/m2 were randomly divided into two groups of 12 people, training and control. The selected exercise included resistance training with weights and a special bodybuilding machine with an intensity of 67 to 80% of the maximum strength and aerobic exercise with a stationary bike and an intensity of 60 to 85% of the maximum heart rate, for 8 weeks and 3 days a week. Body composition measurements were taken 24 hours before and 24 hours after exercise. For statistical analysis in the findings section, one-way analysis of covariance test was used to examine inter-group changes. Findings: The results of this study showed that after eight weeks of resistance and aerobic training, a significant decrease in the BMI of subjects in the training group was observed compared to the control group (P<0.001). Also, the results of analysis of covariance showed that after eight weeks of selected training (resistance-aerobic) the two indexes of IGFBP3 and IGF1 in the training group decreased significantly compared to the control group (P<0.001 and P<0.006, respectively). Conclusion: According to the results of this research, both resistance and aerobic training methods can be used to reduce weight, BMI, IGFBP3 and IGF1.
