求翻译：　　双手扶桌或椅，左腿尽量往后伸，维持10秒，换右腿也是10秒，各重复5遍，这个动作可以增强大腿肌力量。是什么意思？

The double hand-held table or the chair, the left leg will extend as far as possible in the future, maintains for 10 seconds, will trade the right leg also will be 10 seconds, will duplicate respectively 5, this movement might strengthen the thigh myo- strength.

Rotary table or Chair with both hands, his left leg stretched back as far as possible, for 10 seconds, changing his right leg is 10 seconds, repeated 5 times, this motion can enhance the thigh muscle strength.