Could be running, cross trainer, aerobics, stretching, sit ups, swimming, kungfu or whichever exercise you prefer.

可以是跑步，利用健身器材，健美操，伸展运动，仰卧起坐，游泳，武术，或是任何你喜欢的运动。

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An actual elliptical cross trainer is tested to verify the feasibility of design criterions described in this paper.

同时进行了椭圆机实例的测试和分析，对上述准则进行了验证。

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Wednesdays: Do a cross-training (ct) activity (biking, swimming, elliptical trainer) at easy to moderate effort for 30 to 40 minutes. If you're feeling very sluggish or sore, take a rest day.

星期三：舒适的做一个交叉训练活动(骑车，游泳，空中漫步机)30到40分钟。如果你感觉到非常迟缓或者疼痛，休息一日。

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