WASHINGTON, D.C., AUGUST 20, 2013: A station of D.C.Õs Capital Bikeshare near Farragut Square on 17th and K Streets in Northwest. (Astrid Riecken For The Washington Post)

The popular Capital Bikeshare program, where riders can rent a bike and drop it off at various locations throughout the region, has seen a spike in its business, officials said, and the federal government shutdown may be playing a role.

On Tuesday, the first full day of the shutdown, Capital Bikeshare had its 18th busiest day — and its busiest Tuesday — ever, with 10,367 rides. The number of riders also set a record: 9,028.

On Wednesday, the Capital BikeShare tallied 10,393 rides — its 17th busiest day ever.  D.C. transportation officials who help manage the program said they can’t say with certainty that the increase in business is related to the government shutdown. They said warm temperatures this week may have had something to do with it too.

“There are a lot of people who are not reporting to work and perhaps this is part of their daily activity, to relieve the stress of what we’re experiencing with the shutdown,” said Reggie Sanders, a spokesman for the District’s Department of Transportation. “They’re getting out of the house and trying to enjoy themselves a little bit and exercise at a low cost.”