High intensity interval training combined with L-citrulline supplementation: Effects on physical performance in healthy older adults.,Experimental Gerontology

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High intensity interval training combined with L-citrulline supplementation: Effects on physical performance in healthy older adults.
Experimental Gerontology ( IF 3.3 ) Pub Date : 2020-07-25 , DOI: 10.1016/j.exger.2020.111036
Buckinx F ₁ , Carvalho L P ₂ , Marcangeli V ₂ , Dulac M ₂ , Hajj Boutros G ₃ , Gouspillou G ₂ , Gaudreau P ₄ , Noirez P ₅ , Aubertin-Leheudre M ₂

Affiliation

Introduction

The aim of this study was to evaluate the effect of citrulline (CIT) supplementation combined to high intensity interval training (HIIT) on physical performance in healthy older adults.

Methods

This study is a secondary analysis from a double-blind, randomized trial. Among the participants (sedentary & inactive older adults aged over 65 yrs), 44 were non obese (BMI <30 kg/m²) and completed the intervention: Placebo + HIIT (PLA; n = 21) or CIT + HIIT (n = 23). All participants ingested either 10 g of CIT supplementation/day or placebo and followed HIIT sessions (30 min/session; cycle: 30 s > 85% of maximal heart rate (HR) and Borg scale >17/20 + 1:50 min at 65% HR and Borg scale between 13 and 16) on an elliptical device 3 times per week over a 12-week period. Body composition, muscle strength, muscle power, functional capacities (unipodal balance; self-paced and fast Timed Up and Go (nTUG; fTUG); chair test; step tests; 4-meter walking test; 6-minute walking test); dietary intake, energy expenditure and biological markers were measured pre and post-intervention. A repeated-measure analysis of variance was used to estimate time (HIIT intervention), group (PLA vs. CIT) and time*group effects.

Results

The decrease in BMI (p = 0.02) and android fat mass (p = 0.05) were significantly greater in the HIIT+CIT group than in the HIIT+PLA group. Finally, a greater increase in self-paced gait speed (nTUG) (p = 0.02) and fast-paced gait speed (fTUG) (p = 0.03) were also observed in the HIIT+CIT group than in the HIIT+PLA group.

Conclusion

CIT supplementation combined to HIIT is more effective in improving functional capacities and body composition in healthy older adults than HIIT alone.

中文翻译：

高强度间歇训练与L-瓜氨酸补充结合：对健康老年人的身体表现的影响。

介绍

这项研究的目的是评估瓜氨酸（CIT）联合高强度间歇训练（HIIT）对健康老年人的身体机能的影响。

方法

这项研究是来自双盲，随机试验的次要分析。在参与者（年龄≥65岁的中度和不活动的老年人）中，有44名非肥胖（BMI <30 kg / m ²）并完成了干预：安慰剂+ HIIT（PLA；n  = 21）或CIT + HIIT（n = 23）。所有参与者每天摄入10克CIT补充剂或安慰剂，然后进行HIIT疗程（30分钟/疗程；周期：30 s>最大心率（HR）的85％，Borg评分> 17/20 + 1:50 min在椭圆机上，每周12次，每周进行3次，其中HR和Borg的65％比例在13至16之间。身体成分，肌肉力量，肌肉力量，功能能力（单足平衡；自定进度和快速定时起跑（nTUG; fTUG）；座椅测试；台阶测试； 4米步行测试； 6分钟步行测试）；干预前后对饮食摄入，能量消耗和生物学指标进行了测量。使用方差的重复测量分析来估计时间（HIIT干预），组（PLA与CIT）和时间*组效应。