ABSTRAK
Pekerja merupakan kelompok usia produktif yang berisiko terhadap penyakittidak menular karena gaya hidup yang tidak sehat. Sebagian besar waktu bangunpekerja akan dihabiskan di tempat kerja dengan aktivitas sedenter berupa duduk.Waktu menjadi kendala utama bagi pekerja melakukan latihan fisik demimeningkatkan kebugaran jasmani, yang diketahui berbanding lurus denganproduktivitas. Salah satu fokus intervensi adalah peningkatan latihan fisik pekerjapada jam kerja. Beberapa upaya telah dilakukan sebelumnya, namun belum adaalat latihan kardiorespirasi yang ergonomis dan mampu laksana bagi pekerja.Tujuan penelitian adalah untuk mendapatkan model alat latihan kardiorespirasiyang secara efektif dapat meningkatkan kebugaran jasmani pekerja duduk.Penelitian terdiri dari tiga tahap, yaitu tahap pengembangan, tahap penentuanvaliditas, dan tahap pembuktian efektivitas model alat latihan. Kedua tahap awalmenggunakan rancang penelitian potong lintang, sedangkan tahap akhirmenggunakan rancang kuasi eksperimental. Pemilihan sampel dilakukan padapopulasi pekerja duduk di Jabodetabek.Peneliti mendapatkan 3 aspek yang memengaruhi pencapaian denyut nadioptimal, dengan model regresi yang menjelaskan 86,2% variasi pencapaiandenyut nadi latihan optimal (R2 = 0,862). Selain itu, didapatkan protokol danformula uji ukur daya tahan kardiorespirasi untuk memprediksi nilai VO2maksdengan model alat latihan yang mempunyai tingkat akurasi dan presisi baik. Padaimplementasi, didapatkan peningkatan nilai prediksi VO2maks pada kelompokperlakuan di akhir minggu ke-12 dengan selisih rerata 1,21 (2,4) mL/kg/menit(p < 0,005) dan tingkat pemenuhan sesi latihan sebesar 39,7% dari total sesi yangdiharapkan. Sementara itu, terjadi penurunan nilai prediksi VO2maks sebesar 2,8(2,8) mL/kg/menit (p < 0,005) pada kelompok kontrol.Penggunaan model alat latihan kardiorespirasi berbasis pijak kaki Kinesia padaprogram latihan fisik berbasis tempat kerja dikatakan valid (r > 0,3) dan reliabel(r-alpha > 0,6) untuk meningkatkan daya tahan kardiorespirasi pekerja duduk.

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ABSTRACT
Workers are a productive age group who are at risk of non-communicablediseases because of an unhealthy lifestyle. Most of the workers waking time willbe spent in the workplace with a sedentary activity in the form of sitting. Time is amajor obstacle for workers doing physical exercise in order to improve physicalfitness, which is known to be directly proportional to productivity. One of thefocuses of the intervention is to increase the physical exercise of workers duringworking hours. Several efforts have been made before, but there is no ergonomiccardiorespiratory training devices yet that able to do by workers.The purpose of study was to obtain a model of cardiorespiratory exercise devicesthat effectively improve physical fitness of sitting workers. It consists of threestages, namely the development phase, the stage of determining the validity, andthe stage of proving the effectiveness of the exercise model. The first two stagesuse a cross-sectional design, while the final stage uses a quasi-experimentaldesign. The sample selection was carried out in the sitting working population inJabodetabek.The researcher obtained 3 aspects that influenced the achievement of optimalexercise heart rate, with a regression model that explained 86.2% variation in theachievement of optimal exercise heart rate (R2 = 0.862). In addition, thecardiorespiratory endurance test protocol and formulas was obtained to predictVO2max values with a training tool model that had good accuracy and precision.In implementation, it was found an increase in the predictive value of VO2max inthe treatment group at the end of the 12th week with an average difference of 1.21(2.4) mL/kg/minute (p < 0.005) with a training session fulfillment rate of 39.7%of the total expected session. Meanwhile, in the control group there was adecrease in the predicted value of VO2max of 2.8 (2.8) mL/kg/minute (p < 0.005).It was concluded that the use of Kinesia foot rest-based cardiorespiratoryexercise devices model in workplace-based physical training program is said tobe valid (r > 0.3) and reliable (r-alpha > 0.6) to increase the cardiorespiratoryendurance of sitting workers.