I guess I'll be a contrarian and say tattoos.
Reasoning: some of the hottest and fittest chicks have only one physical drawback, which is their tattoos. So it would make the already good into great.
Also in the scenario of waving a magic wand, it seems more believable to make tattoos disappear than fundamentally changing the mindset of laziness.
I like being able to easily identify people who are physically motivated vs those that are sloths. It's getting harder and harder to filter out retards by their tattoos alone since so many "regular" chicks are getting them.
[edit: Scoundrel basically beat me to it]
Reasoning: some of the hottest and fittest chicks have only one physical drawback, which is their tattoos. So it would make the already good into great.
Also in the scenario of waving a magic wand, it seems more believable to make tattoos disappear than fundamentally changing the mindset of laziness.
I like being able to easily identify people who are physically motivated vs those that are sloths. It's getting harder and harder to filter out retards by their tattoos alone since so many "regular" chicks are getting them.
[edit: Scoundrel basically beat me to it]