Light work on her left leg is great for circulation and muscle tone. It will help. Just watch out for signs of blood clots (swelling, redness, pain...). Passive movement and light stretching will slow muscle atrophy. Stroke victims can continue to regain function even years later, so always be hopeful and encouraging.Is she able to walk? Stand on her un-affected leg? Her "good" leg is going to be taking on a lot more work, and more sitting is going to give her tight hip flexors and hamstrings. Sciatica is pain along the sciatic nerve. It can come from very tight muscles (piriformis for sure!), injury along the nerve at some point, or irritation of the nerve root at the spine.It could be just soft tissue causing sciatic pain, but it's always wise to have it checked out by a doctor. An X-ray or MRI (if severe) can rule out spinal issues. If it's a spinal abnormality in the lumbar region, massage can help with the symptoms, but it isn't going to "fix" the sciatica - especially with her recent lifestyle changes. How old is she? If she is over 65, many doctors won't seriously look into the "cause" of her pain and will opt for pain relief measures. They assume it's a result of normal spinal degeneration and lack of movement. It becomes a quality of life issue with the risk/benefits of surgery/medication. You're there to help with her pain relief and rehabilitation. You can encourage her to look into the cause of her pain, but be careful about crossing the diagnosis/treatment line. Do what's in your ability to help her heal, ease her fears, and improve her quality of life.Best of luck,Katykangaroo