Nope. Our kids have been in swim for years (and were in Tae Kwon Do and track prior to that). In addition to swim, we walk at least 2 miles ~3-5 days/week and try to incorporate some hills (not enough, but we do what we can). I also make them go outside to play (get exercise) every day. We’re lucky to have a number of kids on our street and they all ride bikes, walk, skate, etc.
