Have just returned from my travels. My Magnesium Gel Roller travelled with me too. I am a very fit person, ….all the walking on the hard uneven cobblestones throughout Europe,can be a challenge. Any pain experienced, was taken away, with a roll or two on my knees etc , with this Magic Gel formula. I would recommend to use Mismo Magnesium Gel Roller to ease any body pain after any excercise routine .