Not only is aerobic training good for you, but also other sorts of exercise are beneficial.

Endurance Training

Makes your body better at using fat for energy

Makes your muscles more efficient at using O₂ Increases you VO₂ max (the amount of O₂ your body can use in 1 minute)

Strength Training

Makes your muscles thicker, so they can contract stronger.

This is called hypertrophy.

Makes the tendons bigger and stronger

Anaerobic Training

Makes the walls of the heart thicker

Makes your muscles put up with lactic acid for longer, and get rid of it better.