<![CDATA[This study aims to develop a Step Exercise Development Board (SEDBO) as a stronger, safer, and more economical step aerobic exercise tool, and in accordance with the needs of users in the general public, especially at the Happy Gym Pare Kediri Gymnastics Studio. The research method used is Research and Development (R&D) with the Borg and Gall model, which includes needs analysis, planning, product development, expert validation, revision, and small group and large group trials. The product developed is a teak wood exercise board measuring 90 cm × 40 cm × 15 cm equipped with anti-slip features and a two-color design. The validation results by material experts, development media experts, and gymnastics practitioner experts show that the product is in the very feasible category. In the large group trial, the product obtained a feasibility level of 89.6% with a very good category. Based on the results of the study, SEDBO is declared very feasible to be used as a step aerobic exercise medium.]]>
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