We are all inclined to cut corners, even especially when it comes to our health. We may think that by working out and not dieting we're improving our fitness, which we are, but are we really going to lose weight?

Probably not.

Researchers at Arizona State University had 81 overweight women walk on a treadmill for 30 minutes three times a week for 12 weeks total. During the study, the women were asked not to change their dietary habits.

At the end of the study, the results were in: Although participants' fitness levels had improved, not everyone lost weight, body fat or inches. Instead, nearly 70 percent gained weight. And, this wasn't even mostly muscle--it was body fat.

Study co-author Glenn Gaesser told Elle there are likely two reasons why some of the participants gained weight: 1) When they were off the treadmill, the women stopped moving as much as they normally do in their everyday lives, or 2) Because they worked out so much, the gainers compensated by eating more food.

So, what did we learn from this study that we probably should've already known? Cutting corners with your health won't cut inches from your waist; you have to exercise and diet.

[h/t Elle]