It may be a joint-friendly machine, but the elliptical can be a little monotonous. This workout is rather straightforward (that's a clue that there's no backward pedaling in the workout), but it's full of quick speed changes to beat cardio boredom. Plus, intervals are great for torching calories and boosting your metabolism.
*SPM = Strides Per Minute
If you have trouble slowing down in the recovery periods after sprinting and during the cooldown, try going hands free. This will force you to go slower and challenge your core. Click here to print a photo-free version of this speed-play workout to take to the gym. And another thing, my elliptical has a set incline of about 20 percent so work in that range if you can. As always, feel free to adjust the resistance and SPM to best suit your needs.