lose weight 还是lose weights

是lose weights意思是减重

By lifting heavy weights, you are sending a signal to your body that you want to preserve your muscle mass, and that you only want to lose fat, not muscle.

通过举起重物，你在向自己的身体发送一个信号：你想保持身体的肌肉，你只是想减掉脂肪而不是减掉。