How does she stay in shape? The Heroes actress lifts weights twice a week and runs 30 minutes or longer at least three days a week. But she doesn't do it to look and feel good. She does stay fit in order to stay strong and build endurance for diving. Yep, Hayden loves to free dive in the ocean (without scuba gear) and she told Self,

"I feel like I'm in the best shape of my life after a dive. Swimming works all your muscles — your core, glutes, quads, even the ones you didn't know you had, like the little ones in your feet and hands!"