pull from the hang 悬垂提铃
If you're truly a monster, try doing leg lifts with a medicine ball hanging from your feet. Or hang from a pull up bar and raise your legs in front of you all the way up to the bar.
如果你真是一个牛人的话,试着在脚上系个健身实心球,或是在双杠上练习悬垂举腿,把腿一直举到双杠上面。
Run the treadmill. Pull the blocks and hang there from the tree.
单调地踩着踏车,拉动石块,悬在树边。
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