Hello, Your finding with blood on the toilet paper may have occurred secondary to your urine from urinary tract rather than as vaginal bleeding because excessive physical exercise such as heavy lifting is known to cause exercise-induced hematuria (blood in your urine coming from the bladder or another urinary tract), but not from the vaginal canal. It is not a common finding, but it sometimes happens, and the cause is unknown. It may be linked to dehydration or the breakdown of red blood cells from strenuous exercise. I advise you to drink plenty of fluids to work on oral hydration before, during and after the exercise. If this continues, you may want to follow up with your primary care doctor to have more work up including urine testing. Hope I have answered your query. Let me know if I can assist you further. Take care Regards, Dr Katie Lee, General & Family Physician