Could be running, crosstrainer, 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。
2
An actual elliptical crosstrainer 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。
3
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.