everytime i increase my exersize routine, i notice blood in my urine, especially after doing the more strenuous activity more 3 or more days in a row. never an infection present, been to the doc for this before, put me on cipro for 3 days, lab results would come back normal. each time doc was told about increase in activity. i feel very very slight 'sand' like feeling, or discomfort at the exit or my urethra and on the inside at the top of it, no pain elsewhere, no fever, no other symtpoms. feel fine actually. blood comes and goes, only noticed in first morning urine and last one before bedtime.