Assume a prone position on the floor, legs together. Extend your arms overhead & grip a towel or resistance band, with hands about shoulder width apart.
Drive your shoulders up to your ears, squeeze your glutes, and create tension by trying to pull the towel apart.
Staying tight, arms straight, triceps engaged, raise your arms & chest off the floor.
Keep your head neutral, facing the floor. Keep your glutes engaged, & try to reach forward, rather than up & avoid extending through the lower back. Breathe. Hold for time.