Inside vs. Outside: Which Workout Is Best?

A new study comparing indoor workouts with exercise in natural settings found the two aren’t equal for health benefits. Researchers examined Physical Activity in Natural Settings (PANS), which includes activity in places like parks, trails, forests and “blue spaces” such as lakes, beaches or oceans. The findings build on existing evidence that short outdoor bouts—like a walk or bike ride—can improve mood and reduce stress and anxiety. Experts also cited possible cardiovascular effects, including lower heart rate and blood pressure. With many Americans spending about 90% of time indoors, the article notes indoor air can be 2–5 times more polluted, while outdoor activity adds sunlight and vitamin D.