Day Ultimate HIIT Challenge will boost your metabolism and build strength. Access the full program schedule and workout ...

Edwards packs 4 rounds of 10 exercises into this 30-minute HIIT-style workout, with brief “active break” periods between each round. All of the exercises take 30 seconds followed by 10 seconds of rest ...

Place the kettlebell on an exercise mat (and be sure to use one if you have a hard floor surface), then adopt a high plank with your hands on the bell of the kettlebell; this positions your arms ...