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Being outside compared with inside a gym led to a mental boost for nearly all participants.
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Participants were willing to walk farther and at a brisker pace (thereby leading to an increased heart rate and more cardiovascular benefits) than originally directed because they were enjoying themselves.
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When exercising in the gym, there were more concerns with time constraints and questions about how long until the assigned workout would be over.
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Almost all participants reported that the gym workout was more strenuous than the mountain hike, although in actuality, the hike was more demanding on the body because of the terrain incline and high altitude. But because it was more enjoyable, it was perceived as easier.
(Adapted from The New York Times-Health)