Okay, disappeared reply. So this time I'm doing short form.

ClaireLouise raises great points.

Also no stretching, foam roller instead, so joints are not overstretched. Bracing can help as your client's ligaments are stretched in the knee, so knowing optimal stop may be difficult for her to get a handle on. Posture correction with mirrors, awesome so the client can see what you are talking about.

Hypermobility can definitely cause a lot of muscular pain and issue. These clients are often in a lot of pain.

No stretching, foam rolling instead, posture awareness, strengthening, bracing, all can be great aids. Also awareness of trigger points and what they are. Recommend: Clair Davies Trigger Point Therapy Workbook.