Once you feel comfortable doing one-handed cartwheels, practice doing them and wait until the last possible moment to put down your hand as you flip. This will stop you from using your hand as a crutch so that you get used to the feeling of moving upside down in the air without your hands supporting you.

How would you rephrase that briefly using Chinese?
做单手侧翻动作，延迟伸手触地的时间。