What are the activities listed? Since there’s no activities listed, I will just give you an idea on what would be the strenuous sport activity.  It would be swimming.  Swimming Is also called as the best exercise because all your muscle in your body is being used. The list of activities: 
swimming/diving
running
ice-skating
wrestling
gymnastic
golf
tennis
skateboarding
in-line skating
biking
martial
arts
bowling