Beauty of the pre-dawn workout

JAMES Quarles's workout is more than just an eight-mile (12.8 km) run through San Francisco. It's his first meeting of the day - even if it's just a meeting with himself.

He solves problems and hatches business plans for Strava, the 40-million-strong social network for runners and cyclists that he's run for two years.

"I use my workout for free space, creative thinking, and being inspired," he says.