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Comparison of the effects of acute exercise after overnight fasting and breakfast on energy substrate and hormone levels in obese men.

Kim TW, Lee SH, Choi KH, Kim DH, Han TK - J Phys Ther Sci (2015)

Bottom Line: [Purpose] We compared the effects of acute aerobic exercise following overnight fasting and breakfast on energy substrate and hormone levels in obese male college students. [Subjects and Methods] This crossover study recruited 10 obese male college students with a body mass index >25 kg/m(2) or >20% body fat.One week post-recruitment, the subjects exercised in the morning after an overnight fast.At 2 weeks, they exercised post-breakfast.

View Article: PubMed Central - PubMed

Affiliation: Department of Physiology, College of Medicine, Kyung Hee University, Republic of Korea.

ABSTRACT
[Purpose] We compared the effects of acute aerobic exercise following overnight fasting and breakfast on energy substrate and hormone levels in obese male college students. [Subjects and Methods] This crossover study recruited 10 obese male college students with a body mass index >25 kg/m(2) or >20% body fat. One week post-recruitment, the subjects exercised in the morning after an overnight fast. At 2 weeks, they exercised post-breakfast. Energy substrate (glucose, free fatty acid) and metabolic hormone (insulin, growth hormone, and cortisol) levels were measured immediately before and after exercise and at 60 min post-exercise. [Results] We observed interaction effects between the measurement time and exercise treatment for glucose; significant differences between measurement times and between exercise treatments for free fatty acids; interaction effects between the measurement time and exercise treatment for insulin and significant differences in the measurement time; significance differences between measurement times and between exercise treatments for growth hormone; and significant differences between measurement times and between exercise treatments for cortisol. [Conclusion] Morning exercise following an overnight fast can be more effective in reducing body fat than post-prandial exercise. However, increased cortisol levels following exercise after overnight fasting may negatively affect long-term weight loss in obese men.

No MeSH data available.


Related in: MedlinePlus

Schema of the study design and blood collection times
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fig_001: Schema of the study design and blood collection times

Mentions: The experiment had a crossover design (Fig. 1Fig. 1.


Comparison of the effects of acute exercise after overnight fasting and breakfast on energy substrate and hormone levels in obese men.

Kim TW, Lee SH, Choi KH, Kim DH, Han TK - J Phys Ther Sci (2015)

Schema of the study design and blood collection times
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4500013&req=5

fig_001: Schema of the study design and blood collection times
Mentions: The experiment had a crossover design (Fig. 1Fig. 1.

Bottom Line: [Purpose] We compared the effects of acute aerobic exercise following overnight fasting and breakfast on energy substrate and hormone levels in obese male college students. [Subjects and Methods] This crossover study recruited 10 obese male college students with a body mass index >25 kg/m(2) or >20% body fat.One week post-recruitment, the subjects exercised in the morning after an overnight fast.At 2 weeks, they exercised post-breakfast.

View Article: PubMed Central - PubMed

Affiliation: Department of Physiology, College of Medicine, Kyung Hee University, Republic of Korea.

ABSTRACT
[Purpose] We compared the effects of acute aerobic exercise following overnight fasting and breakfast on energy substrate and hormone levels in obese male college students. [Subjects and Methods] This crossover study recruited 10 obese male college students with a body mass index >25 kg/m(2) or >20% body fat. One week post-recruitment, the subjects exercised in the morning after an overnight fast. At 2 weeks, they exercised post-breakfast. Energy substrate (glucose, free fatty acid) and metabolic hormone (insulin, growth hormone, and cortisol) levels were measured immediately before and after exercise and at 60 min post-exercise. [Results] We observed interaction effects between the measurement time and exercise treatment for glucose; significant differences between measurement times and between exercise treatments for free fatty acids; interaction effects between the measurement time and exercise treatment for insulin and significant differences in the measurement time; significance differences between measurement times and between exercise treatments for growth hormone; and significant differences between measurement times and between exercise treatments for cortisol. [Conclusion] Morning exercise following an overnight fast can be more effective in reducing body fat than post-prandial exercise. However, increased cortisol levels following exercise after overnight fasting may negatively affect long-term weight loss in obese men.

No MeSH data available.


Related in: MedlinePlus