Narrator: Muscles! Really? They don't look much use. When a muscle contracts (bunches ... Therefore muscles have to work in pairs to move a joint. One muscle will contract and pull a joint one ...
Muscles are found all over our body. They control the movements we make and help us to move our bodies. If we think about moving some muscles, like our arm muscles, they move. Other muscles ...
I recently discovered a three-move core-building workout from one of my favorite online fitness trainers and decided I'd use ...