Abstract Background: Physical activity had been reported among doctors-in-training, with very few focusing on attending doctors. This study aimed to evaluate the physical activity, particularly exercise, of Thai doctors and features associated with low-level exercise. Materials and methods: Thai doctors who participated in the hospital’s CSR service, which was conducted between Feb 14, 2022, to Oct 31, 2022, were verbally informed along with an information sheet about this parallel study. The doctors who consented to participate provided their personal data on diets, work hours, illnesses, health surveillance, stress, state of well-being, and exercise. To investigate the association with clinical features, the exercise level was categorized as low-level (≤ 2 days/week) or high-level (≥ 3 days/week). Results: The median age of 1187 doctors was 45.0 years. Slightly over half were female (55.4%) or worked ≤ 40 hours/week (55.3%). The presence of illnesses was found in 55.9%, irregular health surveillance in 29.0%, no/low fiber diet in 19.2%, overweight/obesity in 28.0%, and moderate/severe stress in 25.9%. Among the doctors who provided exercise data, 29.8% had a high-level of exercise and 49.0% had a low-level. Independent features associated with low-level exercise were no/low fiber diet (aOR = 3.01), irregular health surveillance (aOR = 2.41), age ≤ 60 years (aOR = 1.82), female gender (aOR = 1.79), and work > 40 hours/week (aOR = 1.76). Conclusions: Only 30% of Thai doctors had a high level of exercise. The significant independent factors for low-level exercise were younger age, female, working load, irregular health surveillance, and no/ low fiber diet. Background doctorsintraining, doctorsintraining training, training doctors-in-training lowlevel methods hospitals hospital s service 14 2022 31 diets hours wellbeing, wellbeing well being, being well-being ( days/week daysweek days week highlevel ≥ days/week. . Results 118 450 45 0 45. 55.4% 554 55 4 (55.4% hoursweek 55.3%. 553 55.3% (55.3%) 559 9 55.9% 290 29 29.0% nolow no 192 19 19.2% overweightobesity overweight obesity 280 28 28.0% moderatesevere moderate severe 259 25 25.9% 298 8 29.8 490 49 49.0 lowlevel. level. aOR 3.01, 301 3.01 , 01 3.01) 2.41, 241 2.41 41 2.41) 6 1.82, 182 1.82 1 82 1.82) 1.79, 179 1.79 79 1.79) 1.76. 176 1.76 76 1.76) Conclusions 30 load 202 11 55.4 5 (55.4 55.3 (55.3% 55.9 29.0 19.2 28.0 25.9 29. 49. 3.0 24 2.4 18 1.8 17 1.7 7 20 55. (55. (55.3 19. 28. 25. 3. 2. 1. (55 (5