6'5
245 - 255lbs (haven't checked in awhile)
I am looking for ways to lose around 20 - 40 lbs, and gain muscle mass at the same time .. I dont have access to a weight machine .. I have other ways of lifting .. I do however have access to a treadmill .. also what Diet will help me with this process....
any help would be appreciated ... due to Summer Volleyball Season

Thanks....