Probably Snowboarding uses most energy because its hard and you have to train a lot.
It is speed skating.The skater has to go as fast as they can .It is unknown which burns the most calories.
what i think of the sport that uses the most energy in an hour is wrestling and track and field because you use youre whole body with that sport
an Olympic sport=the skeleton
Ski Jumping
Ice hockey
Hockey
Figure Skating and the Halfpipe.
bodybuilding
Baseball
The skiing events, downhill, slalom, giant slalom, etc
Baseball definitley
soccer