Sports brand Reebok is challenging die-hard fans to prove their “bond to fitness” by asking them to tattoo the new Reebok logo on their bodies. The person who gets the largest tattoo of the logo will win a year-long sponsorship worth 400.000 Swedish Krona, which is about US$5,800. The challenge will go down during Sweden’s ‘Tough Viking’ race on 30 August. A temporary tattoo studio will be specially set up for the challenge.