Send us your feedback! Back to Rider Biomechanics! I’ll uncover the effective alternatives to growing tall. The majority of women are hollow-backed, with their front longer than their back, and the majority of men are round-backed. There are different ways and places that people hollow, so let's dive in and explore both the challenges and the solutions! We’ll meet low‑beam headlights, seat‑bone flashlights, and two hinges that click you into neutral spine.