The best thing is to do a krachapkracheng instead of sitting in front of tv, sport or go to studying or if it was easier to go for a walk at the Park, or go swimming.
The best thing is to act as active rather than sitting in front of television screens playing sports or studying, or if it's easier. Walk in the park. Or go for a swim or not.
The best thing is being actively instead of sitting in front of the television to play or study or if easier, go for a walk in the park. Or go for a swim.