Visvamitrasana with a chair.
Sometimes I've had people walk out of class when I ask them to grab a chair as a prop. But this is not for the kind of chair yoga that most people think of. In the Iyengar style of yoga which I study and practice, a chair is used to help support the body as you open into greater ranges of strength and flexibility. Check out this way of entering into Visvamitrasana using a chair. Elevating the pose off of the ground by using a chair makes the pose that much easier and more accessible. Give it a try and let me know what you think.