When we talk about the core, we're not just talking about what you're thinking about - the six pack. Or was that just me? Anyway...
It's also about the obliques, which run down the side of the stomach, the muscles that connect the thigh to the pelvis to the back, and also the pelvic floor muscles (the ones you use to stop peeing).
All of the movements we make when cycling (or doing anything else) rely on the core, and maintaining it can actually reduce your chances of getting injured. In this video, road.cc's resident yoga expert Karen Burt explains more.
She explains which of the yoga videos you can play together to make your own personalised yoga routine that'll help get your core into tip-top condition:
For the full series of Yoga for Cyclist videos, click here.
<p>After an unpromising start, having to be bribed by her parents to learn to ride without stabilisers, Sarah became rather keener on cycling in her university years, and was eventually persuaded to upgrade to proper road cycling by the prospect of a shiny red Italian bike, which she promptly destroyed by trapping a pair of knickers in the rear derailleur. Sarah writes about about cycling every weekend on road.cc.</p>