Rope Climb
This one is a serious upper-body challenge. Unlike the rope climb you remember from gym class, you won't be able to use your legs to help you this time. Loop your jump rope over something sturdy and tall like a tree branch or a basketball hoop and climb hand over hand as far as you can go. This also really works your grip strength. Tip: Double up the rope. I've never had a rope break on me but who wants to take chances?