Shake Up Your Cardio

The Full-Body Toner
Combines strength moves and cardio for maximum fat-blasting
Do it: Jump rope for 30 seconds and rest for 30 seconds; do 5 sets. Then perform 2 sets of this 5-minute body-weight circuit: squats, pushups, step-ups, dips, and crunches

Do as many reps of each exercise as you can in 1 minute, moving to the next without rest. Finish with a 10-minute jog at a medium pace.