Buddy Up: The Partner Workout

Side-Plank Pass

Targets shoulders, obliques, and core

• Lie on right side 2 feet apart, parallel to each other and facing the same direction, with partner B in front and holding a 3- to 5-pound dumbbell in left hand.
• Lift hips so you're balancing on right forearm and on the side of right foot, feet stacked. Extend left arm straight up in line with shoulder, palm facing forward.
• B lifts hips slightly and passes dumbbell underneath torso to A, who takes dumbbell in left hand and then extends arm back up again (staying in side plank). Partner A passes dumbbell back to B as B reaches under her body.
• Do 20 reps, then flip to left side so A is in front. Repeat, with A passing dumbbell back to B. (Only the partner in front passes weight under raised hips.)