Larry Zehnder, city public works administrator, said the city's new Bike Share program has had 10,000 riders since it was launched in late July.
He said there is an average rental of 127 bikes a day from stations placed all over downtown and the North Shore.
Mr. Zehnder said the busiest day was 298 riders and the most active 48-hour period was 427.
The average ride time is 25 minutes.
Total ,mileage logged thus far is at 2,000.
He said that means that 400,000 calories have been burned by the riders.