Chin ups!

The second body weight exercise is a chin up. I recommend chin ups for women over pull ups. Chin ups are a bit easier to master and don't encourage a wider back. This exercise is effective especially for the back and biceps, but also uses every other muscle in your upper body as a stabilizer. A proper chin up starts by hanging from a bar, pulling the shoulder blades down and together and using the back muscles to pull your weight up. When you first try a chin up, you may need someone to act as a spotter. Your spotter stands right behind you and supports your bent knees and feet. As you pull up, the spotter helps by pushing your knees and feet up. If you are acting as a spotter, make certain you bend your knees and pull in your abs as you lift. Good luck!