Young D R, Appel L J, Jee S, Miller E R
Welch Center for Prevention, Epidemiology, and Clinical Research, Johns Hopkins Medical Institutions, Baltimore, Maryland 21205, USA.
J Am Geriatr Soc. 1999 Mar;47(3):277-84. doi: 10.1111/j.1532-5415.1999.tb02989.x.
To compare the effects on blood pressure of a 12-week moderate-intensity aerobic exercise program and a T'ai Chi program of light activity.
A randomized clinical trial.
A suburban clinic in the Baltimore, MD, area.
Sixty-two sedentary older adults (45% black, 79% women, aged > or = 60 years) with systolic blood pressure 130-159 mm Hg and diastolic blood pressure < 95 mm Hg (not on antihypertensive medication).
Participants were randomized to a 12-week aerobic exercise program or a light intensity T'ai Chi program. The goal of each condition was to exercise 4 days per week, 30 minutes per day.
Blood pressure was measured during three screening visits and every 2 weeks during the intervention. Estimated maximal oxygen uptake and measures of physical activity level were determined at baseline and at the end of the intervention period.
Mean (SD) baseline systolic and diastolic blood pressures were 139.9 (9.3) mm Hg and 76.0 (7.3) mm Hg, respectively. For systolic blood pressure, adjusted mean (SE) changes during the 12-week intervention period were -8.4 (1.6) mm Hg and -7.0 (1.6) mm Hg in the aerobic exercise and T'ai Chi groups, respectively (each within-group P < .001; between-group P = .56). For diastolic blood pressure, corresponding changes were -3.2 (1.0) mm Hg in the aerobic exercise group and -2.4 (1.0) mm Hg in the T'ai Chi group (each within-group P < .001; between-group P = .54). Body weight did not change in either group. Estimated maximal aerobic capacity tended to increase in aerobic exercise (P = .06) but not in T'ai Chi (P = .24).
Programs of moderate intensity aerobic exercise and light exercise may have similar effects on blood pressure in previously sedentary older individuals. If additional trials confirm these results, promoting light intensity activity could have substantial public health benefits as a means to reduce blood pressure in older aged persons.
比较一项为期12周的中等强度有氧运动计划和一项轻度活动的太极拳计划对血压的影响。
一项随机临床试验。
马里兰州巴尔的摩地区的一家郊区诊所。
62名久坐不动的老年人（45%为黑人，79%为女性，年龄≥60岁），收缩压为130 - 159毫米汞柱，舒张压<95毫米汞柱（未服用抗高血压药物）。
参与者被随机分配到一项为期12周的有氧运动计划或一项轻度强度的太极拳计划。每种情况的目标是每周锻炼4天，每天30分钟。
在三次筛查访视期间以及干预期间每2周测量一次血压。在基线和干预期结束时测定估计的最大摄氧量和身体活动水平指标。
平均（标准差）基线收缩压和舒张压分别为139.9（9.3）毫米汞柱和76.0（7.3）毫米汞柱。对于收缩压，在为期12周的干预期内，有氧运动组和太极拳组调整后的平均（标准误）变化分别为-8.4（1.6）毫米汞柱和-7.0（1.6）毫米汞柱（每组组内P<.001；组间P = 0.56）。对于舒张压，相应变化在有氧运动组为-3.2（1.0）毫米汞柱，在太极拳组为-2.4（1.0）毫米汞柱（每组组内P<.001；组间P = 0.54）。两组体重均未变化。估计的最大有氧能力在有氧运动组有增加趋势（P = 0.06），但在太极拳组无增加趋势（P = 0.24）。
中等强度有氧运动计划和轻度运动计划对既往久坐不动的老年人的血压可能有相似影响。如果更多试验证实这些结果，推广轻度强度活动作为降低老年人血压的一种手段可能会带来巨大的公共卫生益处。
