Jogging is a terrific, simple and low-cost way to lose weight as it burns significantly more calories (up to 65% more) than walking or biking, but many people who are overweight or obese probably avoid it due to fear of joint injury.

CNN: Will jogging hurt an obese person's joints?

Overweight people who want to avoid gallstones should try to lose weight, but do it gradually, as sudden weight loss can trigger gallbladder disease.

BBC: Exercise reduces gallstone risk

Amos Tversky and Nobel Prize winner Daniel Kahneman showed how humans consistently overweight the probability of outcomes they like and avoid losses to an irrational level.

FORBES: Study Turns Risk/Reward Relationship On Its Head