trunk flexion

These movements are the basics before you start getting fancy with anything else and they should never be forgotten.
A strong core is the foundation of a healthier and stronger body and the key to improving your overall fitness.
Breathing can brace us for extremes of pressure and it can release us to explode out of the starting gate. Develop good habits to unleash the power of your breath.
The movement asymmetry in martial arts can lead to big problems with your spine, but there are two simple moves that will help prevent any issues.
Your abs are no different than your other muscles. Work them hard within reasonable repetition ranges.