Katsuyuki TOKINOYA (2016) “ A Comparison of the Degree of Perceived Exertion by Participants In Nordic Walking and Level Walking at Equal Levels of Relative Exercise Intensity”, Sports and Exercise Medicine , 2(1), pp. 1–6. Available at: https://openventio.us/index.php/SEM/article/view/807 (Accessed: 30 July 2026).