There are a number of professional cyclists that use Strava during their training rides. Some even use Strava during race days. If you use this app, then heere is a lit of 10 different cyclists you should be following!
Wilco Kelderman - 23 year old Belkin rider who placed 7th in the Giro in 2014.
Laurens ten Dam - Very active Belkin rider who uploaded his 2013 TdF ride where he placed 13th overall. He holds ~1300 KOM segments.
Ted King - Cannondale cyclist who is a long time users of Strava since 2010 when he cycled for Cervelo. However, he tends not to upload races.
David Lopz - Team Sky cyclist just started uploading rides in the beginning of 2014. He occasionally links his Instagram account to his Strava account for some added fun!
Taylor Phinney - This BMC rider has over 40,000 followers. He does not upload as much as ten Dam, but he does have a few races uploaded, including Paris Roubaix.
Thibaut Pinot - French cyclist riding for FDJ who placed 10th overall at the TdF. He shines in the mountain stages so check out his climbs!
Evelyn Stevens - American cyclist riding for Specialized LuLu Lemon. She only took up professional cycling in 2009 at age 26. On Strava she owns plenty of Queen of the Mountain segments, but that doesn't stop her from also beating out the men in many segments.
Niki Terpstra - Omega Pharma Quick Step rider who uploads most of his training rides and races. He won Paris Roubaix and uploaded this race as well.
Marianne Vos - Seen as the best female cyclist of all time, she has dominated both road racing and cyclocross. This Rabobank rider only joined Strava in April of this year.
Nino Schurter - Current World mountain bike champion, he road with Orica GreenEdge this year at the Tour of Romandie. He regularly uploads both mountain bike and road bike training rides.