Sit-ups are great for strengthening the core but ... We see this, and you'll certainly feel this, with the flutter kicks, leg raises, and bent-leg raises. These three moves emphasize the lower ...

that the femur or thighbone rotates from the hip joint so that our knees line up inside the hips, resulting in a knock-kneed stance. This is only worsened when we sit with our legs crossed or ...

With a less than snappy name of the Ergonomic Recliner Add-on, it transforms your chair into a recliner, letting you sit back with your legs up or lay yourself almost horizontal and get some rest.