Kaelyn Franco noticed her thighs were swollen after the spin class, but thought it meant she was building muscle. (Courtesy Kaelyn Franco) The 45-minute spin class Franco took on Sept. 15 was her ...

Intense exercise can trigger rhabdo, with spin classes in particular posing “risks to newcomers,” experts have warned. The 45-minute spin class Franco took on Sept. 15 was her first.

This week, the team headed to Flywheel for a 45-minute spin class. For two members, Mark Wright and Tracy Taylor, it was their first spin class.

Kaelyn Franco noticed her thighs were swollen after the spin class, but thought it meant she was building muscle. Courtesy Kaelyn Franco The 45-minute spin class Franco took on Sept. 15 was her first.

The 45-minute spin class Franco took on Sept. 15 was her first. The Marlborough, Massachusetts, resident loves to ride bikes so when the weather got colder and she joined a gym, her cousin ...

Kaelyn Franco noticed her thighs were swollen after the spin class, but thought it meant she was building muscle. (Courtesy Kaelyn Franco) The 45-minute spin class Franco took on Sept. 15 was her ...