Planks are an isometric exercise that strengthens the core, shoulders, back, and glutes, improving posture and stability. How to Perform: Start in a forearm plank with elbows under shoulders. Keep your body in a straight line from head to heels. Hold for as long as possible while maintaining form. Variations: 💪 Side Planks – Engage obliques by performing on one forearm. 💪 Plank with Leg Lift – Lift one leg at a time for added intensity. 💪 Plank to Push-Up – Alternate between plank and push-up positions.