<s>[INST] hi doc For the last two year I notice my body changing. I wanted to know if I possible have a virus. Here whats going on. I am a soccer player. My energy level has dropped a lot. My sexual attitude has changed. My feet and legs are always tired. when I walk or run the bottom of my feet hurt. when i sit down to recharge them, they are still hurting. When I have sex with my wife, I do not last as long as normally did. When I drink it have no effect on me lasting longer when it comes to sex. I am worried that i might have something that effect my sexual attitute as well as my lower body. [/INST] Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. According to mention history your main complaint is regarding the weakness and changing in your body. For that first of all rule out anemia by your routine CBC and HB estimation. If HIV like infection is suspected then you can do the work up  for that with 4th generation Elisa testing. Your liver and Kidney Disease profile also should be check through Liver enzyme reports and serum urea and Creatinine. If no specific course is found for weakness then EMG like investigation can be planned. Hope this will help you. Let me know if I can assist you further. </s>