23/09/2026
Flat back or rounded - your instructor isn't just cueing shape. They're cueing a whole different set of muscles. ๐
On the Short Box, a flat back loads the posterior chain: back extensors, glutes, hip flexors - and builds length through the spine.
A rounded back turns the focus inward - deep abdominals, spinal flexion, segmental mobility.
Depending on what your body needs, one will serve you better than the other on any given day.