Use Santosha, the Niyama of contentment & acceptance, to practice a set of asanas to open tight hips & low back. By accepting her condition, client can lean into experience of what is & consider how that may apply to other areas of her life.
https://health.clevelandclinic.org/do-hip-opening-exercises-actually-provide-relief-for-tight-hips/

W/ appropriate props, practice 3 restorative asanas evenings 4-5x/week for 5-7 minutes each for 2 weeks. Client to journal on progress & insights.
Supported Child's Pose - increases flexibility in low back & hips.
Resting Dragonfly - opens hamstrings / adductors / low back. Increases circulation to pelvic floor.
Floating Star - final relaxation

57-y-o female - experiencing ongoing pain in posterior pelvic area and chronic tight hips and hamstrings. No current medications or medical conditions.
Client is an avid cyclist and fitness buff. Wants to focus on creating more flexibility in hip region. Can’t seem to find a consistent routine that’s bringing desired results.

I envisioned a discussion re her history and experience with flexibility and any feelings or patterns she's noticed. Referring to the sources noted below, I also planned to discuss the Chakras, specifically the Root, Sacral and Solar Plexus Energy Centers to see if this might provide her with some reference points and awareness as she moves through her daily life.

Wheels of Life, Anodea Judith, PhD
https://yogainternational.com/ecourse/introduction-to-the-chakras/
https://www.theyoganomads.com/chakras/

I'd then explain / demonstrate the 3 restorative postures - answer questions and ask if she was in agreement with starting with these postures. I'd then guide her through the postures - approximately 10 - 15 minutes each. We'd then close with a discussion and follow-up for the next session.

The first branch used was Asana - 3 gentle postures to connect with her body as a whole, then focusing on her low-back and hips. This would help her practice Santosha by taking time to tune in and explore what she was sensing in her body. The next teaching was Pranayama, simple, deep breathing to support her in connecting with her body, relaxing and letting go of any tension or tightness she might be experiencing as a means of Santosha and accepting where she's at in the present moment. I'd then talk about Pratyahara - attuning to her inner experience to deepen her experience of Santosha.

We had a lot to review in our 75-minutes together. At times I felt as though it was too much. Yet she was clearly receptive and eager to learn more. She especially appreciated the Pranayama I introduced. We then talked about how simple, deep breathing could transform many parts of her day - when driving, in a tough conversation, frustrations with her son, etc.
She enjoyed the 3 postures and was hopeful that they might help over time. She admitted that she was looking for a quick fix. We talked about making it a part of her evenings - an opportunity to wind down, reflect upon her day and prepare for bed.

I encouraged her to continue with these 3 postures supported by Pranayama in service to Santosha. I then suggested she could journal about her day-to-day experience with her tightness noting anything that caught her attention re mood, activities and any other insights. Where else could she experience Santosha in her life as well as where it was missing.

She was curious to learn more about the Chakras and found some relevance about each of the root Chakras we discussed and what had been going on her life. I emailed her the resources noted above and encouraged to explore further, as time permits.

I did apply my plan as intended. I felt confident in my ability to improvise as we moved through our session together. I believe the primary goal was achieved - offering some gentle Asanas to provide relief and increased flexibility to the client's lower back and hips. I was delighted to see how the Pranayama and Chakras Intro served to deepen her experience and awareness with her body and its multi-dimensional aspects.

I didn't have to adapt anything, but found myself enthusiastically expanding upon what we were working on without overdoing it. This was an enjoyable session for me, as it helped me to relax and trust myself and all that I've learned and intuit at times.

If faced with the same situation again, I would use the same approach based upon the Pancha Kosha model. This gradual, multi-dimensional progression from outer to inner experience and awareness works.

We had a good connection and were at ease with discussing the various components of her intended goals and care plan. Together we were able to go to a deeper place so that she could experience something more than just loosening up her tight hips and lower back.