A little stretchy (and it's free)

Sage Rountree: Yoga For Cyclists

This short online yoga practice is appropriate for cyclists—as well as anyone who spends time sitting in a chair each day. Start with a gentle spinal warm up that also targets the front of the hips and chest, releasing tightness. Move into a series of lunges to stretch the hips front and back, inside and outside. Finish with a supported back bend to release the hip flexors further. Have a yoga block or a blanket on hand for this practice.

Yoga for Cyclists

Also, here is a link for a 20 min Yoga for Runners from Ekhart Yoga.

Yoga for Runners