Elliptical Tabata

If you think you've got what it takes, here's the drill. First, do a five-minute warm-up by running, cycling, or jumping rope for five minutes at about 40% of your full effort. For the intervals, work on a track, treadmill, stationary bike, elliptical trainer, or a heavy gym bag, and alternate 20 seconds of activity at full effort with 10-second rest periods. Each sprint-rest combo counts as one interval. After the intense section, do a five-minute cool-down in the same way you warmed up. Try to do four intervals at first, then gradually work your way up to six. Repeat the workout three to four days a week.
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