Use the lunge to high knee reps to (mentally) prepare for the jump lunges that follow. After three rounds of deadlift rows, goblet squats and glute bridges, we’re blasting the core from two ...

Both legs should be bent at a 90-degree angle at the bottom of the lunge. Straighten your left leg and kick your right foot forward to hip height or higher if possible then step back into your lunge.

Put on your weight vest, keeping your core tight and hands down by your sides Drop into a squat and kick your ... and then ...