I would love some suggestions for a good cross training activities for my 11 close to 12 year old. The season ends at the end of the month and doesn't start again until March. He gets about 6 weeks off from club training, although he will be doing indoor/futsal games once a week, and some indoor/futsal pick up games during the break. But we would like him to do some other activity, preferably that involves running and core strength work, but are open to anything that will encourage use of different muscle groups than those for soccer. Right now we are considering a couple sessions a week of Parkour, in a gym setting, not on the streets! Any other suggestions would be great, maybe pick up basket ball to add to the mix?