1. Lateral walking plank
Start in plank position with elbows under shoulders, feet hip-width apart. Step right foot out and shift right forearm to side (not shown), hold for 1 count, then return to start. Repeat on opposite side. That’s 1 rep. Do 8 reps.
Perfect your form: Avoid sticking your bum up in the air.
Dial it down: Hold plank for 45 to 60 seconds.
Amp it up: Take wider steps with arms and legs.