Is your ab workout hurting your back?

The “core” remains a somewhat nebulous concept; but most researchers consider it the corset
of muscles and connective tissue that encircle and hold the spine in place. If your core is stable,
your spine remains upright while your body swivels around it. But, McGill says, the muscles
forming the core must be balanced to allow the spine to bear large loads. If you concentrate on
strengthening only one set of muscles within the core, you can destabilize your spine by pulling
it out of alignment. Read more: