Working in an office can negatively impact fitness levels due to prolonged periods of sitting and limited physical activity. Office environments often encourage sedentary behavior, which can lead to weight gain and decreased energy levels. This inactivity may also contribute to muscle atrophy, poor posture, and increased stress. Integrating movement, such as regular breaks to stand, stretch, or walk, is essential to counter the effects of office work and promote better overall health and well-being.