This article is from the Aerobics Fitness FAQ, by email@example.com (Robles) with numerous contributions by others.
If your goal is fat loss, then try to achieve a maximal
_calorie_ burn, and don't worry about a maximal _fat_ burn. As
long as you are expending more calories than you are consuming
-- on a regular and consistent basis -- then the fat/weight will
come off. Any aerobic activity which you enjoy doing enough to
do 3-5 times a week at a moderate intensity for at least 20
continuous minutes at a time will help you burn lots of calories;
dance/step aerobics, bicycling, swimming, basketball, soccer,
running, skating, hiking, and walking are all good examples.