The Wheelbarrow family is a named after wheelbarrow races, and just like its namesake, it can be quite tiring! Even in the supported variations, the man needs to support a good portion of the woman's weight, while doing all the thrusting... which can be tiring enough on its own. If the woman isn't confident that she can hold herself up through an orgasm, we recommend starting at a lower altitude or supported, and having some pillows placed for backup just in case.