National Take The Stairs Day highlights the fitness benefits of choosing stairs over elevators. Stair climbing burns significantly more calories per minute than walking on flat ground, with estimates suggesting 8-11 calories per minute compared to 3-5 calories for walking. This increased calorie expenditure is due to the vertical effort against gravity, engaging leg muscles more intensely. Incorporating stair climbing into daily routines can be an effective way to boost overall energy expenditure and support weight loss without needing a gym.