dude this is fucking freeskiing. we are lazy assholes who like smoking weed and sitting on our asses. dumont is probably the only freeskier on the face of the earth who trains. but if you are looking for a sport to replace skiing in the summer, then skateboard. some other people might tell you to fruitboot, but that doesnt do shit and its gay as fuck.
get outside! Play Baseball, Go Biking, Kayak, get a physical job..... this is not hard.... i fall out of shape during the winter, definitely not the summer.