Here’s another reason to love Casual Friday. A study by the American Council on Exercise found that on days that participants wore jeans to work, they took, on average, 491 more steps than on days they wore normal business attire. That adds up to an extra 25 calories burned just for wearing jeans. That’s not exactly a huge weight loss strategy, but you could bring it up at the next staff meeting. Casual day every day, or at least every Friday!