Citi-bike allows you to do what kind of physical activity?

____________ are exercises where a person uses gravity and body weight for resistance.

Yoga and other stretching movements can help improve _____________.

The activity pictured here is...

Marathon runners have to have a lot of _________ to complete the entire 26 mile race.

This Muscle is called the __________.

When he stands up straight, the muscles on the front of his leg will contract. What is the name of this group of muscles?

Crunches target which muscle group?

When we push weight away from us we are using the muscles in the back of our arms called ____________.