Want to add one thought: The walking is surely helping with all areas. I couldn't walk well or far for several years until I started the water therapy. That strenthened my whole body, inside and out I suppose. My conditioning has now gotten to the point I can do the walking I need, like when I'm at Mayo....walking the connected buildings. It's a real jump forward for me to be 'mall walking'. Guess that is a good indication the combination of all the above....like Sue listed.....works together to help us get stronger and healthier. Now, understand, I will usually have a dip in my condition, from a fall or something that gets me back on the roller-coaster with this health. But, I'm stronger!!! Fewer falls since on Requip! I also have had bloodwork ckg my D3, B's, Magnesium, zinc...and hormones! Thyroid is so important, affects all my systems. I understand it is often lower as we age. Happened to me. Now, just HAVE to stay on top of the numbers. Just some thoughts...Elizabeth