Foam rollers are cylindrical whilst massage balls are usually round. Whilst both foam rollers and massage balls aim to provide myofascial release, they both serve a different purpose.Massage balls are able to target specific muscles and help release the pain that is localized by applying targeted pressure that goes deeper than foam rollers. Due to its round shape, they can get to spots that a foam roller probably is not able to get to. They are smaller in size, so quite travel-friendly.Foam rollers are bigger and apply general pressure on larger muscles. Foam rollers are ideal if you want to get a general massage, which can help with recovery, improve your flexibility and your athletic performance immensely.