Coderre allowed the cameras into his city hall office Wednesday morning to catch a glimpse of him during his morning workout on his exercise bicycle.
He announced last month that he wanted to slim down by 53 pounds to reach a healthy weight, and also to improve his chances of finishing the Tour de l'Île bike ride through the streets of Montreal.
Coderre says he pedals for 30 minutes every morning.
He says he's lost 24 pounds since he started and now weighs 254 pounds.
The mayor says his goal is to slim down to 225 pounds for the May 31 bike ride.