Great full body, at home workout
Walk for 3 minutes at 4.0; run at 7.0 for 90 seconds; then sprint at 9.5 for 30 seconds -- repeat until you have completed 30 minutes (should be close to 4 miles!) -- then jog for 3 minutes to cool-down. --Love marathoner Kara Goucher!!
Work Your Entire Body With This TRX Circuit Routine.. Totally in love with TRX!
20 Minute Stair Master HIIT Workout