Our knees are a miracle of biological engineering. Each day, these intricate structures of bone, cartilage, and fluid silently bear loads equivalent to several times our body weight, allowing us to walk, run, and leap. …

Now Small Appliances
Now Small Appliances

Our knees are a miracle of biological engineering. Each day, these intricate structures of bone, cartilage, and fluid silently bear loads equivalent to several times our body weight, allowing us to walk, run, and leap. …

We’ve all been there. On the floor, hands laced behind our head, determined to conquer that most fundamental of exercises: the sit-up. We take a breath, tighten our stomach, and pull. Nothing. Or worse, a …