It will frustrate you and tapping your foot and twiddling your thumbs are recommended for this exercise, you will also find yourself staring into nothingness.
让你沮丧、揉脚、玩弄姆子都是这次练习所推荐的，你同样会发现你所凝视的东西是不存在的。
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To create electricity for our modern AIDS - GPS, EPIRB, AIS, Satnav and so forth - we have four solar panels, a wind generator and a foot pump, which will also serve as exercise equipment.
The best way to do this exercise, however, is not with your foot on a stool, but rather while lying on your back. This is how Pitchford taught me the hamstring stretch.