McDonnell, LHume, PNolte, V2023-01-242023-01-2420122012International Symposium on Biomechanics in Sports. https://ojs.ub.uni-konstanz.de/cpa/article/view/5294https://hdl.handle.net/10292/15831Reliability, variability, and validity of stroke rate measured via a Digitrainer accelerometer and GoPro 60 Hz video camera were determined. Six elite New Zealand kayakers (three males, three females) performed three trials of 300-m sprints in a single kayak (K1) mounted with the Digitrainer and camera. Average individual within-trial reliability and between-trial reliability and variability were calculated using data from 40 strokes beginning at 200-m. Both Digitrainer and video showed good reliability (Mdiff% =5%; ES =0.6), and moderate variability (ICC <0.67; TE% <10%). There was good agreement between Digitrainer and video stroke rates (r=0.86, p=0.000), however the Digitrainer overestimated stroke rate by 4 ±5 spm. Both systems can assess relative change in stroke rate, however video should be used when valid stroke rates are required.Authors can retain copyright, while granting the International Society of Biomechanics in Sports (ISBS) the right of first publication.analysis; immediate feedback; technique; technologyOpenAccess