“…Anaerobic force measured by tethered swimming is frequently well related to performance [18,23,26]. Force measurements in all-out tests lasting 10-30 s are well related to free swimming performance in 50 m, 100 m and 200 m [1,22,27]. In addition, parameters of a tethered 30 s all-out (AO30s) swim respond well to different training interventions such as tapering, dry land strength training, resisted and assisted swimming, and cross training [2,9,12,27], and are even sensitive to warm-up [25].…”