Nah, my mum's been doing Tai Chi for the last few months. She's trying be able to raise her leg vertically to maybe at least 45-degrees above the horizontal. Stretching works, sure, but I also believe she needs to improve on all her leg muscles as well as her core. As for what exercises will get her there specifically, I don't know. Just because I did a pharmacy degree, she expects me to an internal medicine specialist in everything - as well as her personal trainer.