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Influence of Skeletal Muscle Carnosine Content on Fatigue during Repeated Resistance Exercise in Recreationally Active Women
- Source :
- Nutrients, Vol 9, Iss 9, p 988 (2017), Nutrients, Nutrients; Volume 9; Issue 9; Pages: 988
- Publication Year :
- 2017
- Publisher :
- MDPI AG, 2017.
-
Abstract
- Carnosine is a naturally occurring intramuscular dipeptide that is thought to attenuate fatigue during high-intensity exercise. Carnosine content is influenced by various factors, including gender and diet. Despite research reporting that carnosine content is lower in women compared to men and lower in vegetarians compared to omnivores, no investigations have examined carnosine content in women based on dietary protein intake and its effect on muscle fatigue. Twenty recreationally active women were assigned to either a high (HI; n = 5), moderate (MOD; n = 10), or low (LO; n = 5) group based upon intramuscular carnosine content of the vastus lateralis. Each participant underwent two unilateral maximal voluntary isometric contractions (MVIC) of the knee extensors separated by an isokinetic exercise protocol consisting of five sets of 50 repeated maximal unilateral contractions. Magnitude-based inferences were used to analyze group differences. Percent decline in rate of force development and peak torque (PT) during the MVICs and changes in PT and mean torque during the muscle-fatiguing protocol were lower in HI compared to both MOD and LO. Additionally, absolute and relative dietary protein intake were greater in HI compared to MOD or LO. Results indicated that greater intramuscular carnosine content was reflective of greater dietary protein intake and that individuals with higher carnosine content displayed a greater attenuation of fatigue compared to those with lower carnosine.
- Subjects :
- Adult
0301 basic medicine
medicine.medical_specialty
Group based
Carnosine
lcsh:TX341-641
Isometric exercise
histidine dipeptides
Article
Young Adult
03 medical and health sciences
chemistry.chemical_compound
0302 clinical medicine
Isometric Contraction
Internal medicine
Humans
Medicine
Muscle, Skeletal
Exercise
Nutrition and Dietetics
Muscle fatigue
business.industry
Resistance training
Skeletal muscle
Isokinetic Exercise
030229 sport sciences
dietary protein intake
intracellular buffering capacity
muscular acidosis
fatigue
Surgery
030104 developmental biology
Endocrinology
medicine.anatomical_structure
chemistry
Female
Dietary Proteins
business
lcsh:Nutrition. Foods and food supply
Dietary protein intake
Food Science
Subjects
Details
- ISSN :
- 20726643
- Volume :
- 9
- Database :
- OpenAIRE
- Journal :
- Nutrients
- Accession number :
- edsair.doi.dedup.....e5fe0f1f6b3e26313f0bae629f78eb88
- Full Text :
- https://doi.org/10.3390/nu9090988