The film explores the muscular system of the human ... skeletal muscles, smooth muscles, cardiac muscles, voluntary, involuntary, muscle contraction, energy production, lactic acid, anatomy ...

When you hop, run or jump, your legs behave like springs, absorbing and returning energy with each step. But what happens to your muscles and ... Applied Physiology. "Human movements like hopping ...

Modern human anatomy has built on the strengths ... cannot extend their knees and lock their legs straight as humans can. Instead, they have to use muscle power to support their body weight ...