Just curious really. So many people seem to be into endurance sports these days and it obviously requires a certain drive to compete in regular marathons, triathlons, etc. So, would those of you who do need someone similar as a partner - e.g. they'd understand, share the interest or just be unnattractive if they weren't as dynamic in some way (e.g. maybe if they cycled it'd be fine, but not if they were, for example, obsessed with painting instead)?