Thread the needle
Set Up: Sit tall on the floor, holding a towel with both hands while extending your arms in front of your chest.
Action: Lean back slightly, lifting and straightening your legs to bring both your legs and body into a V shape, as shown [A]. Slowly “thread” your feet back and forth, moving one leg over top of the other [B]; crossing each leg once counts as one rep. Repeat for two sets of 12 reps.
Expert: Linda LaRue, Los Angeles-based celebrity trainer and creator of the Core Transformer videos and exercise tube.