The answer is because of the rise of “fitness footwear”, according to a study by Phillip Plein, a professor of psychology at Yale University.
“In a world where physical activity has become so commonplace that many people have forgotten how to do it, many people are getting in shape to feel good and healthy,” he said.
The study, published in Psychological Science, looked at the relationship between the use of footwear and the use and satisfaction of exercise in men and women, with an eye towards why people may be turning to them.
“People who have the physical ability to perform an exercise task are also more likely to feel that they have achieved that task,” Mr Plein said.
“It’s a very powerful mechanism that makes us feel good about ourselves, so we’ll use it for many different things.”
For the study, researchers surveyed 2,200 people who were either inactive or very inactive.
They asked about their physical activity levels, how often they used them and how satisfied they were with their workout routines.
Results showed that people who said they used a lot of physical activity were more likely than others to feel satisfied with their daily routines.
“There’s a positive relationship between exercise and health, but there are many other factors that can make the exercise a better fit for you,” Dr Plein added.
“I think it’s just one more way in which we’re becoming more aware of the importance of physical activities and exercise in our daily lives.”
Mr Plein was a key figure in a previous study on the benefits of wearing a pair of trainers, which found that people wearing them were better at increasing the body’s metabolic rate and helping them burn fat, which in turn helps them lose weight.
He said it was difficult to separate the two, but the two appeared to have a similar effect on the body.
“The trainers are just a way to make exercise easier on the human body, so the more you exercise, the less the body feels it,” he explained.
“They’re just a form of fitness, but that’s just a matter of personal preference.”Read more: