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 by jogging. Then run a strong effort (not a sprint) up the hill for 90 seconds. 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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