Why is it easier to say lift with your back i stead of using your legs? Basically, why is it more common for people to use the wrong type of movement for tasks that increases their risk of injury?
In: Biology
Efficiency and safety are at odds. Your body would rather use less energy and therefore defaults to the movement that involves lifting less mass, bending at the waist means you don’t have to move your thighs up and down. Bending at the knees takes more energy as you have to move more of the mass in your body. The problem is the muscles in your lower back are weaker than the muscles in your legs and therefore more likely to tear if you bend at the waist. Using your legs is safer, but uses more energy. People get tired and default to the low energy solution.
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