The calf muscle is often called the body’s ‘second heart’ 🦵❤️ Why? Because it plays a major role in circulation. When your calf muscles contract—especially during walking—they squeeze the deep veins of the lower leg and help push blood upward against gravity back to the heart. This system is known as the calf muscle pump. If the calves are weak or inactive (prolonged sitting, immobilization, injury), blood can pool in the legs, leading to swelling, fatigue, and increased risk of circulation pro