This simple lab activity will allow students to estimate their total blood volume, stroke volume, and cardiac output, both at rest and while exercising. Metric units are used as per Canadian standard. Materials required: Scale, measuring tape, stop watch, and calculator.This lab can be used for Ontario Curriculum: SBI3U, SBI3C, PSK4U, and PPL4O, Sample calculations included. Some fonts may not work on all computers. File can be altered to include marks if necessary.