Coach Seper on Instagram: "For better results, focus on core contraction and keep your abs engaged throughout the movement. Just like a plank, this plank alternative becomes harder by reducing rest time between sets. Increasing the duration of each set will also boost core strength. This exercise is ideal for people with lower back pain or disc issues. It helps build a strong core without putting pressure on the spine. Many people in gyms struggle with plank discomfort due to back problems. Smar

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