In contrast to interval sprint exercise performed on a track or a motorized treadmill, interval sprint exercise performed on a cycle ergometer or a manually propelled treadmill engages the forearm skeletal muscle because the hands grip the handle bars isometrically at intensities up to 100% of maximum voluntary contraction (T.D. Olver, A.R. Smith unpublished observation – pilot testing on 3 subjects in our lab revealed that maximum voluntary hand grip strength was ~9% greater during a bout of sprint exercise versus in a seated position, not performing whole‐body exercise).