RUN FOUR TO SIX TWO-MINUTE HILL REPEATS: Now you get to run up that moderate (6-8% grade) hill you found yesterday. Warm up with a one-mile jog. Then run hard up the hill for two minutes. Walk back down to the bottom, and repeat for a total of four to six hill repeats. Stretch afterwards. Note: Going down hills causes the most muscle soreness and can stress your knees. Be sure to walk or jog lightly down hills.
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