When we think about matters of the heart, we tend to look upwards. This Valentine’s Day, I invite you to look down. No - even further down... The calf muscles are sometimes called the body’s "second heart" - and unlike most romantic metaphors, this one is anatomically sound. Every time you walk, rise onto your toes or perform those surprisingly tiring heel lifts in Pilates class, your calf muscles contract and squeeze the deep veins of your lower leg. This helps push blood ba