Faculty of Sport Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama, 359-1192, Japan.
Graduate School of Sport Sciences, Waseda University, Tokorozawa, Saitama, 359-1192, Japan.
Eur J Nutr. 2020 Aug;59(5):2261-2270. doi: 10.1007/s00394-020-02234-z. Epub 2020 Apr 6.
Dietary replacement of an acute exercise-induced energy deficit offsets the postprandial triglyceride (TG)-lowering effect of exercise in young boys and middle-aged men. It is unclear whether these findings are observed when exercise is accumulated in older adults. This study examined the effect of accumulating short bouts of exercise, with and without dietary replacement of an exercise-induced energy deficit, on postprandial TG in older women.
Seventeen older women (≥ 65 years) underwent three, 8-h trials: (1) control, (2) accumulated walking and (3) accumulated walking with energy replacement. During the control trial, participants rested for 8 h. The accumulated walking trials comprised twenty 1.5 min brisk walking bouts performed at a pre-determined self-selected pace separated by 15 min seated rest. In each trial, participants consumed a standardised breakfast and lunch. The breakfast in the accumulated walking with energy replacement trial included replacement of the energy deficit (0.62 MJ, 149 kcal) induced by exercise. Venous blood samples were collected fasted and at 2, 4, 6 and 8 h after breakfast.
Time-averaged postprandial serum TG concentrations over 8 h were lower after accumulated walking than control and accumulated walking with energy replacement (mean ± SD: 1.46 ± 0.93 vs 1.71 ± 1.01 vs 1.60 ± 0.98 mmol/L, respectively: main effect of trial p = 0.017). There was little difference between control and accumulated walking with energy replacement.
Replacing the energy expenditure induced by accumulating 30 min of brisk walking in short (1.5 min) bouts diminishes the postprandial TG-lowering effect in older women.
用日常饮食替代一次急性运动引起的能量亏空，可以抵消运动对年轻男孩和中年男性的餐后甘油三酯（TG）降低作用。但不清楚在老年人中是否也能观察到这些结果。本研究旨在观察在老年人中，通过日常饮食替代运动引起的能量亏空来积累短时间运动，是否会对餐后 TG 产生影响。
17 名老年女性（≥65 岁）参与了三项为期 8 小时的试验：（1）对照，（2）积累步行，（3）积累步行加能量补充。在对照试验中，参与者休息 8 小时。在积累步行试验中，参与者以预先设定的自感用力度进行二十次 1.5 分钟的快走，中间间隔 15 分钟的静坐休息。在每一次试验中，参与者都要食用一份标准化的早餐和午餐。在积累步行加能量补充试验中，早餐要补充运动引起的能量亏空（0.62MJ，149kcal）。禁食和早餐后 2、4、6 和 8 小时分别采集静脉血样。
与对照和积累步行加能量补充试验相比，8 小时的平均餐后血清 TG 浓度在积累步行后较低（平均值±标准差：1.46±0.93 比 1.71±1.01 比 1.60±0.98mmol/L，试验间主效应 p=0.017）。而对照和积累步行加能量补充之间则没有差异。
用日常饮食替代 30 分钟短时间（1.5 分钟）快走积累引起的能量消耗，会降低老年女性的餐后 TG 降低作用。
