This makes me angry! Not only is it almost torturous for the child. Saying he enjoys it,ok maybe he does. But do you as his father enjoy pushing him to his physical limit twice a day?! and shouting "GO, GO, GO" at him because he has stopped or has done what is asked of him?
When that child grows up, (if his body lasts that long). I think there's a high chance he will not take these sports much further, because of the memories of doing them. Support the child as you may, but forcing him do it twice a day is just sick!
Edit: Also I'd like to see his face under that full face helmet. When he looked over his shoulder, was he over the moon? I think not, he's probably bright red in the face and absolutely knackered.