4. Plank
Start by supporting your body on your elbows or hands and toes. Keep your back and legs straight, avoiding sagging or arching. Hold for 30 seconds, repeating 2 to 3 times. Experiment with variations like hand planks, elbow planks, or side planks. Each session should last at least 2 minutes. Skip this if you've had recent surgery, tendon issues, organ inflammation, or heart and blood vessel conditions.
