Chest Challenge

For the Chest Challenge workout, complete as many rounds as possible in 20 minutes. Rest when you need to and always listen to your body. If you are up for the challenge, do this workout two times per week and try to increase the number of rounds or reps you do in a given workout.

Core Crusher

For the following Core Crusher circuit, aim to get in three rounds, for a total of nine minutes. Again, always listen to your body and rest when needed. Form is critical with planks—it’s common to arch or curve the back when fatigue sets in. At this point, drop to your knees or simply rest. There is no need to get injured while working on strengthening your core. To increase the difficulty of this workout, add time to each exercise (e.g., increase each exercise by 15 seconds).