Gym headphones face different challenges than running headphones. Weight training, HIIT, and CrossFit involve explosive movements, lying on benches, hanging upside down, and heavy sweating. Your headphones need to survive all of it.
Ear hooks are the most secure fit for gym use. The Beats Powerbeats Pro 2 and JBL Endurance Peak 3 both use over-ear hooks that physically lock the earbuds in place. No amount of burpees will shake them loose.
Water resistance matters for sweat: IPX4 handles sweat and splash. IP68 (JBL Endurance Peak 3) means you can literally rinse them under a tap after a sweaty session.
Bass-forward sound profiles work better for workouts. The Beats Powerbeats Pro 2 has a deliberately punchy bass tuning designed to match high-energy workout playlists. The JLab Go Air Sport+ has built-in EQ modes including a bass boost.
Hygiene tip: look for wipeable or washable earbuds. Silicone tips are easy to clean. The JBL Endurance Peak 3's IP68 rating means you can wash them completely.