Work up a sweat, tone and sculpt with this four-week total body workout by WH&F trainer Nichelle Laus.The workout:The following circuit can be performed three days per week, on Monday, Wednesday and Friday.On the other days between (Tuesday and Thursday) perform moderate cardio for 20 minutes.Week 1: Perform 2–3 sets of the circuit with 1 minute in between exercises.Week 2: Perform 3–4 sets of the circuit with 1 minute in between exercises.Week 3: Perform 3–4 sets of the circuit with 30 seconds in between exercises.Week 4: Perform 3–4 sets of the circuit with as little time as possible between exercises.1. Dumbbel single arm split squat to pressPerform 8 reps per legAssume a split squat position with your left foot forward. Hold a moderately weighted dumbbell in your right hand. Hold the dumbbell at the height of your right shoulder and brace your core as you descend into the split squat