Diabetes Care：餐后快走控制餐后高血糖更佳

　　美国一项研究表明，在老年人群中，间断短时间餐后快走可更有效控制餐后高血糖。论文6月11日在线发表于《糖尿病护理》（Diabetes Care）。

　　此项研究从社区中纳入10例不活动的老年受试者；受试者均不吸烟，BMI<35 kg/m²，并且空腹血糖浓度介于105～125 mg/dL。受试者进行餐后快走15分钟或持续行走45分钟（10:30 A.M. 或4:30 P.M.）锻炼。通过持续血糖监测确定超过48小时的血糖浓度。

　　结果显示，与对照期间相比，晨间持续行走（127 ± 23对118 ± 14 mg/dL）和餐后快走（129 ± 24对116 ± 13 mg/dL）均可显著改善24小时血糖控制。此外，餐后快走降低3小时餐后血糖的效果显著优于晨间或下午45分钟的持续行走（P<0.01）。

Three 15-min Bouts of Moderate Postmeal Walking Significantly Improves 24-h Glycemic Control in Older People at Risk for Impaired Glucose Tolerance.
Abstract
OBJECTIVEThe purpose of this study was to compare the effectiveness of three 15-min bouts of postmeal walking with 45 min of sustained walking on 24-h glycemic control in older persons at risk for glucose intolerance.RESEARCH DESIGN AND METHODSInactive older (≥60 years of age) participants (N = 10) were recruited from the community and were nonsmoking, with a BMI <35 kg m-2 and a fasting blood glucose concentration between 105 and 125 mg dL-1. Participants completed three randomly ordered exercise protocols spaced 4 weeks apart. Each protocol comprised a 48-h stay in a whole-room calorimeter, with the first day serving as the control day. On the second day, participants engaged in either 1) postmeal walking for 15 min or 45 min of sustained walking performed at 2) 10:30 a.m. or 3) 4:30 p.m.. All walking was on a treadmill at an absolute intensity of 3 METs. Interstitial glucose concentrations were determined over 48 h with a continuous glucose monitor. Substrate utilization was measured continuously by respiratory exchange (VCO2/VO2).RESULTSBoth sustained morning walking (127 ± 23 vs. 118 ± 14 mg dL-1) and postmeal walking (129 ± 24 vs. 116 ± 13 mg dL-1) significantly improved 24-h glycemic control relative to the control day (P < 0.05). Moreover, postmeal walking was significantly (P < 0.01) more effective than 45 min of sustained morning or afternoon walking in lowering 3-h postdinner glucose between the control and experimental day.CONCLUSIONSShort, intermittent bouts of postmeal walking appear to be an effective way to control postprandial hyperglycemia in older people.