(Always remember to warm up for a few minutes before you start, and don’t forget the cool down at the end.)
• Cycle or run at high intensity for one minute. Follow this with three minutes of lighter cycling or running. Repeat this cycle ten times for a 40-minute workout.
• If you are walking outside, walk as fast as you can for one block, then an easier pace for two blocks.
• If you are on the elliptical machine, increase your speed and/or incline for the first minute of a song, and slow down on …