Add Yahoo as a preferred source to see more of our stories on Google. “As a fitness culture, and in society in general, we’re afraid of spinal flexion,” where the lower back is flexed into a C-shape, ...

Your back is key to your physique goals. Here’s how much you need to train to start achieving them.

The glute extensions can help you to grow your glutes. Use this guide to keep your back safe as you focus on strengthening and working your glutes.