Background: Several recent studies have reported significantly larger declines in relative physical fitness (PF) of patients with diabetes (DM) versus those without diabetes. In our study, we set out to establish that the presence of DM in obese patients with hypertension (HT) is linked to a significant decrease in physical activity (PA), and also to PF which is important for ensuring mobility, independence at an elderly age, and efficiency in everyday life. We also sought to demonstrate the protective role of PA and PF, and to show that more attention must be paid to the importance of both PA and PF in prevention and therapy of non-communicable diseases. The study assessed the relationships between the current level of PA and PA in childhood and the level of PF of obese people aged 40+ with co-existing HT.Methods: The study included 82 obese patients with co-existing HT in their history. In order to assess the level of PA we used the International Physical Activity Questionnaire (IPAQ). PF was assessed by observing the performance of patients in seven selected tasks (Fitness Test): 30 Second Chair Stand, Handgrip Strength Test, Sit-and-Reach Test, One Leg Stand Test, Plank Test, Wall Squat Test, and 2-Minute Step-in-Place Test.Results: There was a significant differentiation in the amount of MET-min./week obtained for particular activities (vigorous, moderate, walking) by men (p=0.048) with significant grater amount of vigorous activity than moderate activity (p=0.024). When subjects were classified according to their IPAQ questionnaire category, 24.4% were classified as having a high level of PA, 45.1% a sufficient level, and 30.5% an insufficient level of PA. We noted that the higher the level of PA, the higher the PF – even in obese participants with HT. On the other hand, co-existing diabetes lowers almost all analyzed parameters, both biochemical and fitness ones. Conclusions: The analysed PF is probably not related directly to obesity of the participants or coexisting HT. On the other hand, the current PA level, the deficiency of which seems to be related to low PF and/or HT do seem to be related to the degree of PF.