Wolfe L A, Laprade A, Burggraf G W, Norman R
School of Physical and Health Education, Queen's University, Kingston, Ontario, Canada.
Int J Sports Med. 1992 Jul;13(5):384-9. doi: 10.1055/s-2007-1021285.
Seven previously sedentary women (mean age, 19 yrs) participated in an 11-week running program (4-5 sessions/week) in preparation for a 10 km race. Training intensity was 80-85% of maximum heart rate reserve. Exercise duration began at 20 minutes/session and was lengthened 5 minutes/session every 2 weeks. A control group consisting of 4 women was also evaluated. Maximal oxygen uptake (VO2max, ml/kg/min) increased 11% in the trained group and decreased 6% in the control group during the study (p less than 0.05). Oxygen uptake, cardiac output (Q), and stroke volume (SV) increased significantly (p less than 0.05) in the trained group during each of 3 levels of steady state cycle ergometer exercise (heart rate targets: 115, 135 and 155 beats/min, respectively). Arteriovenous oxygen difference (a-V02 diff) was not increased significantly after training. Resting left ventricular dimensions and performance evaluated by echocardiography also did not change significantly after training. It was concluded that short-term conditioning in this population results in an increased exercise Q without concomitant increases in left ventricular dimensions or arteriovenous oxygen difference.
七名之前久坐不动的女性（平均年龄19岁）参加了为期11周的跑步计划（每周4 - 5次训练），为10公里赛跑做准备。训练强度为最大心率储备的80 - 85%。运动时长从每次20分钟开始，每2周每次延长5分钟。还对一个由4名女性组成的对照组进行了评估。在研究期间，训练组的最大摄氧量（VO2max，毫升/千克/分钟）增加了11%，而对照组则下降了6%（p小于0.05）。在稳态自行车测力计运动的三个水平（心率目标分别为115、135和155次/分钟）的每一个阶段，训练组的摄氧量、心输出量（Q）和每搏输出量（SV）均显著增加（p小于0.05）。训练后动静脉氧差（a - V02 diff）没有显著增加。通过超声心动图评估的静息左心室尺寸和功能在训练后也没有显著变化。得出的结论是，该人群的短期训练导致运动时的心输出量增加，而左心室尺寸或动静脉氧差没有相应增加。
