The Beats Solo 4 Wireless are decent for sports and fitness. They're lightweight, stable on-ear, and have a decently comfortable fit. Using them wirelessly also helps reduce the chances of something snagging the headphones off your head. Plus, they come in a couple of different colorways, so you can stand out at the gym. Unfortunately, they don't have an IP rating for water resistance, but that's not uncommon for on-ear headphones.