Continuous versus Intermittent Dieting for Fat Loss and Fat-Free Mass Retention in Resistance-trained Adults: The ICECAP Trial
| Autor: | Jackson J Peos, Paul A. Fournier, Carly Hall, Eric R. Helms, Amanda Sainsbury, Julian Ong, James W. Krieger |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Adult
Male Diet Reducing Energy balance Appetite Physical Therapy Sports Therapy and Rehabilitation Young Adult 03 medical and health sciences 0302 clinical medicine Animal science Weight loss Weight Loss medicine Humans Orthopedics and Sports Medicine Resting energy expenditure Muscle Strength Exercise Caloric Restriction business.industry Leptin Feeding Behavior 030229 sport sciences medicine.disease Confidence interval Affect Muscle dysmorphia Peptide YY Physical Endurance Female medicine.symptom Energy Intake Energy Metabolism business Dieting |
| Zdroj: | Medicine & Science in Sports & Exercise. 53:1685-1698 |
| ISSN: | 1530-0315 0195-9131 |
| DOI: | 10.1249/mss.0000000000002636 |
| Popis: | Introduction Can intermittent energy restriction (IER) improve fat loss and fat-free mass retention compared with continuous energy restriction (CER) in resistance-trained adults? Methods Sixty-one adults (32 women) with mean (SD) age 28.7 (6.5) years, body weight 77.2 (16.1) kg and body fat 25.5 (6.1)% were randomized to 12 weeks of (1) 4 x 3-weeks of moderate (m) energy restriction interspersed with 3 x 1-weeks of energy balance (mIER; n=30; 15 weeks total), or (2) 12 weeks of continuous moderate energy restriction (mCER; n=31). Analyses of all outcome measures were by intention-to-treat. Results After accounting for baseline differences, mIER did not result in lower fat mass or body weight, or greater fat-free mass, compared to mCER after energy restriction. Mean (and 97.5% confidence interval, CI) for fat mass at the end of mIER versus mCER was 15.3 (12.5 to 18.0) kg versus 18.0 (14.3 to 21.7) kg (P=0.321), for fat-free mass was 56.7 (51.5 to 61.9) kg versus 56.7 (51.4 to 62.0) kg (P=0.309), and for body weight (with 95% CI) was 72.1 (66.4 to 77.9) versus 74.6 (69.3 to 80.0) (P=0.283). There were no differences between interventions in muscle strength or endurance or in resting energy expenditure, leptin, testosterone, insulin like growth factor-1, free 3,3',5-triiodothyronine or active ghrelin, nor in sleep, muscle dysmorphia or eating disorder behaviours. However, participants in mIER exhibited lower hunger (P=0.002) and desire to eat (P=0.014) compared to those in mCER, and greater satisfaction (P=0.016) and peptide YY (P=0.034). Conclusions Similar fat loss and fat-free mass retention are achieved with mIER and mCER during 12 weeks of energy restriction; however, mIER is associated with reduced appetite. Trial registration ACTRN12618000638235p. |
| Databáze: | OpenAIRE |
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