Strengthen and tone your upper body and core with this workout, which includes X planks, X mountain climbers, and half burpees with plank jacks. Complete as many laps of the shown exercises as possible during each seven-minute circuit, ensuring you maintain proper form. Perform each circuit back to back with one minute of rest in between (start with circuit one, rest for a minute, continue on to circuit two). Do each circuit once for 14 minutes of work, or repeat for 28 minutes of work.
For the breakdown of the full arms and abs workout, visit: Kayla Itsines's 4-Week No-Equipment Workout Plan Weeks 2 and 4: Arms and Abs