Children today have less physical exercises than the children of the past generations. They stay at home doing nothing but play favorite computer games, and or watch tv and so they sweat less. My sons are like it, too whenever they are at home, instead of playing basketball or other outdoor games with friends, their turf are playing computer games and chatting with online friends. When I am fully recovered I will start brisk walking exercises every morning with them. This way, they can exercise together with me.