2. 200 Jumping Jacks (Cardiovascular MetCon & Lateral Agility) Primary Targets: Calves, deltoids, hip abductors/adductors, and cardiovascular system. The Functional Benefit: Most functional training happens forward-and-backward. Jumping jacks force lateral movement, which strengthens the stabilizer muscles in your ankles, hips, and shoulders. It keeps the heart rate spiked between heavy strength movements.