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Increase in insulin secretion and decrease in muscle degradation by fat-free milk intake are attenuated by physical exercise
- Source :
- Clinica Chimica Acta. 484:21-25
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- Background Protein intake, particularly branched chain amino acids (BCAAs), and exercise have opposing actions on insulin secretion, but the same action on protein anabolism. We examined the effects of BCAA-rich fat-free milk intake and/or exercise on levels of insulin secretion and indices related to muscle protein metabolism in order to assess the potency of dietary and exercise therapies against metabolic and locomotive disorders. Methods Eight adult female volunteers participated in all four 24 h experiments; control diet intake with or without exercise, and fat-free milk-containing diet intake with or without exercise. Fat-free milk was replaced with one-sixth of all foods in the control diet. Exercise was set at an equal-energy level as fat-free milk. Urine and fasting blood samples were collected for each experiment. Results Urinary C-peptide immunoreactivity excretion and serum insulin levels were significantly higher, but urinary 3-methyl-histidine excretion levels were significantly lower with low urinary adrenaline and dopamine excretion in the fat-free milk-containing diet than in the control diet. These findings were reduced by exercise with high urinary adrenaline and noradrenaline excretion. Conclusions BCAA-rich fat-free milk intake enhanced insulin secretion and suppressed muscle protein degradation, but these effects are attenuated by exercise accompanied with increase in catecholamine secretion.
- Subjects :
- Adult
0301 basic medicine
medicine.medical_specialty
medicine.medical_treatment
Urinary system
Clinical Biochemistry
030209 endocrinology & metabolism
Physical exercise
Urine
Biochemistry
Excretion
Young Adult
03 medical and health sciences
Catecholamines
0302 clinical medicine
Internal medicine
medicine
Animals
Humans
Insulin
Secretion
Muscle, Skeletal
Exercise
business.industry
Biochemistry (medical)
General Medicine
Metabolism
Healthy Volunteers
Milk
030104 developmental biology
Endocrinology
Catecholamine
Female
business
Amino Acids, Branched-Chain
medicine.drug
Subjects
Details
- ISSN :
- 00098981
- Volume :
- 484
- Database :
- OpenAIRE
- Journal :
- Clinica Chimica Acta
- Accession number :
- edsair.doi.dedup.....eae6c5ccef78e1a3fd20f37181c1879c