Maybe I need to clarify my response to the issue of fatigue. I no longer play pickleball or tennis, but I do get exercise by walking- outside in the summer and I use a treadmill in winter. I also have an exercise bike that I use mainly in the winter. I just am careful about playing contact sports ( ex: tennis and pickleball). I am aware of my risk of falling and fracturing a bone. I have had non displaced stress fractures of the neck of both femurs and have a rod in each femur. I didn’t realize I had osteoporosis until my first fx. Than I started on Fosomax but did not tolerate it well so I changed to Reclast. I have done well until the winter of 2016. I live in northern Minnesota and had a bad tib/fib fracture but this was not caused by osteoporosis but by ice on a parking lot. I have not fractured anything else but I do not want to risk it. I have taken a few bad falls but luckily just had some bruises. So, I agree that exercise is very important. I just needed to find exercises that are safe for me to do. I also have something called a PFO or Patent Foramen Ovale ( a hole in my heart). I am on a blood thinner for that. So contact sports are not safe for me. Sorry, this got longer than I expected. So I just think that we need to be aware what type of exercise we are recommending to others. Thank you for your encouragement and positive attitude. It is nice to share with someone that is so caring and kind.