Peos Jackson J, Helms Eric R, Fournier Paul A, Sainsbury Amanda
School of Human Sciences, The University of Western Australia (UWA), Crawley, Western Australia, Australia.
Sports Performance Institute New Zealand (SPRINZ), Auckland University of Technology, at AUT Millennium, Auckland, New Zealand.
BMJ Open Sport Exerc Med. 2018 Oct 16;4(1):e000423. doi: 10.1136/bmjsem-2018-000423. eCollection 2018.
Reducing fat mass (FM) while retaining fat free mass (FFM) is a common goal of athletes. Evidence suggests that some-but not all-forms of intermittent energy restriction (IER) may be superior to the conventional method of continuous energy restriction (CER) for people with excess body fat that are sedentary, by reducing some of the adaptive responses to ER. However, it is yet to be established whether this dietary approach is effective for athletes.
A single-blind, parallel group, randomised controlled trial with a 1:1 allocation ratio is proposed. Sixty healthy athletes aged ≥18 years will be recruited from local sporting facilities and randomised to an intervention of either moderate CER (mCER) or moderate IER (mIER). Both interventions will consist of 12 weeks of moderate ER, plus 3 weeks in energy balance (EB). The mCER intervention will entail 12 weeks of continuous moderate ER, followed by 3 weeks in EB. The mIER intervention will entail 12 weeks of moderate ER, administered as 4×3 week blocks of moderate ER, interspersed with 3×1 week blocks of EB. The co-primary outcomes are changes in FM and FFM after 12 weeks of moderate ER. Secondary outcomes will be changes in FM and FFM at 15 weeks after intervention commencement, as well as muscle performance, physical activity, sleep quality, changes in resting energy expenditure, subjective drive to eat, circulating concentrations of appetite-regulating hormones, mood states and diet acceptability.
ACTRN12618000638235p.
减少脂肪量（FM）同时保留去脂体重（FFM）是运动员的一个共同目标。有证据表明，对于久坐不动且体脂过多的人而言，某些（但并非全部）形式的间歇性能量限制（IER）可能优于传统的持续能量限制（CER）方法，因为它能减少对能量限制的一些适应性反应。然而，这种饮食方法对运动员是否有效还有待确定。
拟进行一项单盲、平行组、随机对照试验，分配比例为1:1。将从当地体育设施招募60名年龄≥18岁的健康运动员，并随机分为中度持续能量限制（mCER）或中度间歇性能量限制（mIER）干预组。两种干预措施均包括12周的中度能量限制，外加3周的能量平衡（EB）期。mCER干预将包括12周的持续中度能量限制，随后是3周的EB期。mIER干预将包括12周的中度能量限制，以4个3周的中度能量限制阶段进行，中间穿插3个1周的EB阶段。共同主要结局是中度能量限制12周后FM和FFM的变化。次要结局将是干预开始后15周时FM和FFM的变化，以及肌肉性能、身体活动、睡眠质量、静息能量消耗的变化、主观进食欲望、食欲调节激素的循环浓度、情绪状态和饮食可接受性。
ACTRN12618000638235p。
