Indoor cycling may be a low-impact workout, but it's certainly not easy — as anyone who's sweated, huffed, and puffed their way through a SoulCycle or Peloton class can attest. Unlike an outdoor ...

Lindsey Ellefson is Lifehacker’s Features Editor. She currently covers study and productivity hacks, as well as household and digital decluttering, and oversees the freelancers on the sex and ...