Thank You, I Am 53, I Have Emphysema So I

Thank you, I am 53, I have emphysema so I am less active but I still do get around (I am on oxygen but I do not bring it to work in the day time), go to work (use the elevator instead of stairs) go for light walks at night. I am not doing any vigorous work or work out but in the morning when I am at work, after sitting for any amount of time, when I stand up my upper leg muscles are very sore as though I have been working out. I used to work out when I was younger and this is exactly what it feels like. By the evening I can stand and sit without any pain or discomfort at all.