We are assessing the accuracy of the Cosmed K5 portable metabolic cart when placed in a vented and non-ventilated hip bag in comparison to the device being worn in the standard back harness setup. If validated, this will allow researchers to still use the device while being worn in a hip bag, when using the back harness is not an option, such as with firefighters due to their oxygen tank on their back. Check out our recruitment flier & consent document below and contact us at CMRL@appstate.edu if you have questions or want to participate!