well.. there are two possibilities...
1. u actually have some type of renal disease
2. being a bigger guy with more muscle.. your body is naturally producing more creatinine
i was the latter case... i went to a nefro and got a 24 hr urine sample collected... she said it was because i was a big guy with alotta muscle and i cleared me...
i come up 1.6 every single time...
in other words.. go see a nefro asap.. get some clear answeres