It varies from individual to individual but what they might not tell you at a blood donation is that it can take up to 10-12 weeks to fully replenish the amount of lost red blood cells following a typical donation (12-16oz). The consequences of participating in strenuous physical activity will also vary from individual to individual, and intensity of activity, ranging from no perceivable difference to fainting due to low blood pressure. According to the OP up to 8oz of blood was drawn, but the OP is also relatively small at 130lbs. I would recommend, as many others did as well, to give it a try and adjust effort accordingly.