If you only have time to do one type of exercise, I believe it should be resistance training. Many people are confused because of what is promoted in mainstream media, and they prioritize cardio over weights. That is a big mistake.
  1. Weights change your body composition for the better
  2. Weight training burns more calories than cardio
  3. gives you an unjustified reason to pig out
  4. Weight training gives you confidence
  5. Weight training will give you a fine booty!