Another source of paleo converts is CrossFit, a programme known for gruelling workouts combining weightlifting and gymnastics. CrossFit trainers, who teach at more than 1,200 gyms around the US, generally encourage clients to follow either a caveman diet or the Zone diet, which requires tracking calories. "Some of the gyms have hardcore paleo members, and if youre a member of that gym then youre paleo, while other gyms are hardcore Zone," says Anthony Budding, who manages the content on .
