hello ,my name is roy,I am 70 yrs young.and over the last 3 yrs, I have been getting aching muscl;es and back pain, and it only bothers me whenever I mow the yard with my push mower. it only takes about 3 minutes of walking and pushing,until my whole body gets so weak that I cant hardly walk .so I have to sit down real quick, and rest, and after about 10 min. I am ok again, and it only happens when I mow the yard, and weed eat. an its been going on for about 2 or more yrs,and getting worse, I get so tired and so weak so fast, I had a kidney trasspland 17 yrs ago,and I take anti rejection drugs, and prednisone, and 3 different kinds of high blood press. meds. I don t take any kind of statins at all. so I don t know what it might be, God help me@@@!!!. my e mail address is... YYYY@YYYY