Davidson told me to try backwards jump-roping.
戴维森建议我向后跳绳。
Drossin did jump roping, skipping drills, box jumps, and even high-knee sprints through the "rope ladder" that you often see at football training camps.
Drossion跳绳，钻孔，跳箱子，甚至用足球训练营里的“绳梯”来进行高抬腿训练。
You might try jump roping instead for cardio.
你也许会尝试冲刺跳远而不是立定跳远。
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