他们能把健身实心球掷得很远。
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。
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.
如果你只用一两个器械的话：一个哑铃，一个壶铃，一条跳绳，一个健身实心球，或者一条杆（用作引体向上）等，都可以作为选择。你还可以对自己加大挑战。
If you add just one or two pieces of equipment: a dumbbell, a kettlebell, a jump rope, a medicine ball, or a chinup bar, for example, you can increase the challenge even more.
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