Sprint the Hill
Find a good hill for this one. Mark off a distance of about 40 yards. Repeat the exercises below as many times as possible in 20 minutes. When you're going up the hill, go all out. Sprint hard. Use the down hill to walk or jog. Either way, catch your breath and get ready for the next round.
20 Min AMRAP
10 Jumping Lunges Total
Hard Run up the Hill, walk back