A surfer clad in full wetsuit rides a wave and catches air .
The surfer is burning calories .
A surfer clad in full wetsuit rides a wave and catches air.
The surfer is burning calories.
The surfer is burning calories as swimming inferred by surfer clad in full wetsuit riding a wave is a calorie-burning exercise.
The surfer is burning calories as swimming inferred by surfer clad in full wetsuit riding a wave is a calorie-burning exercise .