If your body does not regularly exercise, it consumes poorly oxygen. Oxygen is needed by your muscles, otherwise they will not be able to work for a long time and reliably, as they could. As a result, when you need the strength of your muscles, you will be weak and tired quickly.
Moreover, sagging muscles cause a feeling of dissatisfaction with their appearance. Your emotional state becomes a mirror of your physical condition, further enhancing fatigue.
That is why experts believe that physical exercises are of double benefit. First, they improve your physical condition by scattering oxygen through the muscles, increasing stamina. Secondly, physical activity contributes to a sense of well-being. Studies show that if you train your body, it is better tolerated everyday emotional and physical stress, which are part of our lives.