My blood test results

I recently had to take many blood tests to determine what might be causing my joints to ache and swell. I got the results back today and the only things that showed up even a tad abnormal were urea nitrogen and creatinine. Both of these were elevated 1 point above the normal reference range. I told her that I thought, although I wasn’t 100% sure, that strenuous weight training could elevate both these levels…anyone know if this is correct???

As for the rest of the results everything looked normal…The doc thinks I may have seronegative Rheumatoid arthritis…but she’s a holistic practitioner and hopefully we can get it under control…