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- W2500340090 abstract "High-intensity interval training (HIIT) is a popular and effective program to elicit physiologic adaptations favorable to quality of life improvement and metabolic disease risk reduction. Whether an older population (>50 y) would be more challenged to retain body protein performing HIIT compared to younger individuals is unknown. PURPOSE: To determine if measures of body protein retention and exercise performance change in older adults completing a 2-week HIIT program, compared to younger adults. METHODS: Healthy, young (n=8; 24.4±3.6 y; BMI=27.1±2.8 kg·m-2) and older (n=8; 59.4±5.6 y; BMI=26.8±5.6 kg·m-2) males and females completed a 2-week (6 sessions) HIIT program on a cycle ergometer. Baseline nitrogen balance (NBAL) and urinary creatinine (UC) were assessed from 24-h urine collection and 3-d habitual diet recall. Baseline maximal oxygen uptake was determined via graded exercise test with indirect calorimetry on a cycle ergometer. Each HIIT session was 10x60 s at 90% of peak power achieved in the VO2max test. Recovery interval was 60 s active recovery (50 W). Nitrogen balance and urinary creatinine were determined on the initial and final (6th) day of the HIIT program by 24-h urine collection and a prescribed, eucaloric, adequate-protein diet (1.5 g protein·kg-1·d-1 and ≤ 30% of kcal from lipid.) A final VO2max test was used to assess changes in peak oxygen uptake (VO2) and peak power (PP). RESULTS: RMANOVA resulted in no significant mean difference in NBAL, UC, VO2, and PP between baseline, initial and final workout days in the young and older groups (p<0.05; see table). CONCLUSION: Older, healthy adults can retain body protein while engaging in HIIT as long as they consume a eucaloric diet with adequate dietary protein (1.5 g·kg-1·d-1).Table: No title available." @default.
- W2500340090 created "2016-08-23" @default.
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- W2500340090 date "2016-05-01" @default.
- W2500340090 modified "2023-10-18" @default.
- W2500340090 title "Body Protein Retention is Maintained in Older Adults Performing High-Intensity Interval Training (HIIT)" @default.
- W2500340090 doi "https://doi.org/10.1249/01.mss.0000485101.01688.26" @default.
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