Looking for calf exercises that you can do with a foam roller ? Get an overview here. Not only is the classic BLACKROLL® STANDARD foam roller a regenerating force for your calves: the BLACKROLL® DUOBALL 08 does the job too. Your calf consists of two parallel muscle groups which can be easily targeted using the foam roller but even more intensively with the DUOBALL. Also, the speed determines the effect it has: slowly rolling the foam roller relaxes the calves while fast rolling activates them.