Affix a resistance band around a solid rack or pole.
Move away until the band gives you some resistance.
Facing the band, kneel up and put one foot out in front of you.
The band should be on the kneeling leg, up below your glute.
Make sure the band is pulled tight to provide you with some resistance and move around in this position, lifting your arms, until you feel a stretch.
Keeping your body upright, make small movements in this position to find areas of tightness.
See what suits you best.