When pill bugs roll into a tiny ball, the act looks far simpler than it actually is. Known as conglobation, a pill bugs’ “ball” involves a full-body engineering trick designed to protect them from ...

Keeping the back flat, lie supine on the floor, knees up, holding a stability ball between your hands and knees. Extend opposite arm and leg (left leg, right arm and vice versa). Repeat 10 to 12 reps ...