Development of a digital-based sit and reach box for measuring body flexibility

Technology and education development are expected to make teachers easier create produce learning media used practically efficiently. This study the research (R&D) method proposed by Borg Gall, consisting of ten steps. It aimed develop a preliminary product design for digital-based flexibility test measuring instrument. produces body measurement tool physical subjects, particularly fitness. The participants this were Tanjung Lago 1 Public Middle School students validated, revised, tested on small large scales. Three experts validated through questionnaire various kinds questions, i.e.1) an expert in sports tests measurements, namely lecturer at PGRI Palembang University (94% very compatible category), 2) electrical from C.V. Cometronica (82% appropriate 3) teacher Physical SMPN (97% proper category). three reveal that average 91% sit reach box applied measure is worthy. supported statistical results small-scale trials with normality 0.200, homogeneity 0.785, paired sample t-tests large-scale 0.64, t-test 0.299. indicates developed meeting validity effectiveness can be implemented teaching activities. Key words: development, flexibility, digital.