Stop the escalators: using the built environment to increase usual daily activity.

Area of Science:

• Public Health
• Exercise Physiology
• Urban Planning

Background:

• Obesity is a significant epidemic in the United States, with two-thirds of the population being overweight and insufficiently active.
• Urban environments, particularly in Eastern cities, often feature escalators that facilitate sedentary behavior among commuters.
• Stair climbing is a moderate-intensity physical activity, categorized within 3-6 metabolic equivalent tasks (METs), and burns 3.5-7 kcal/min.

Purpose of the Study:

• To determine the potential caloric expenditure and subsequent weight change for New York City subway riders.
• To evaluate the impact of choosing to walk stairs over escalators for daily commutes.

Main Methods:

• Calculated caloric expenditure based on the number of steps (25 per subway entrance) and energy cost per step (0.11-0.15 kcal/step up, 0.05 kcal/step down).
• Utilized data of 5,000,000 daily journeys on the New York City Subway, assuming a round trip for approximately 2.5 million individuals.
• Applied the standard of 3500 kcal expenditure required to lose one pound.

Main Results:

• New York City subway riders choosing stairs over escalators could collectively lose over 2.6 million pounds per year.
• The average subway rider could lose approximately one pound annually through this behavioral change.

Conclusions:

• Consistent stair climbing offers a significant, albeit incremental, method for weight management, potentially reversing decade-long weight gain trends.
• The built environment can be leveraged to encourage physical activity through subtle modifications, such as optimizing stairwell accessibility and appeal.
• This approach highlights the potential for public and private initiatives to foster increased physical activity in daily routines, leading to substantial population-level health improvements.