Answer :
Final answer:
Swimming and cycling demand high initial fitness, while snorkeling and snowboarding may not require as much at the beginning.
Explanation:
Swimming requires a high level of fitness from the beginning due to its aerobic nature and full-body workout.
Cycling is another sport that demands a high level of fitness, particularly for long-distance cycling or competitive cycling events.
On the other hand, sports like snorkeling and snowboarding may not necessitate as high a level of initial fitness compared to swimming or cycling.
