If you have a teenager at home, you might have noticed a new interest: strength training! Maybe you've seen them eyeing ...

“If you have less strength, it can be harder to carry something heavy ... strain your back. Lift with care. Keep your head up and your shoulders back, and hold the object at waist height ...

Pulley systems are simple machines that make lifting heavy objects easier. They consist of a rope or cable that passes over one or more wheels (pulleys). A single pulley changes the direction of ...