The Queens College Step Test is a submaximal exercise test used to estimate cardiorespiratory fitness (CRF) by measuring heart rate recovery after a fixed duration of stepping up and down on a step. While VO2 max testing using a metabolic cart is the gold standard for measuring CRF, the Queens College Step Test provides an affordable and accessible alternative that has been shown to provide reasonably accurate estimates of CRF in young, low-risk adults. Though not as precise as VO2 max testing, the Queens College Step Test requires only basic equipment like a metronome or timer and stopwatch and can be completed in a timely manner, making it a practical option for assessing CRF in many settings.