12 before-and-after pictures of people who changed their bodies through diet and exercise

When it comes to fitness, making the decision to transform your body through diet and exercise is the easy part. It's actually sticking with your new lifestyle, and dedicating yourself to your fitness journey, that's tough.

There will be days when you don't want to work out or when you're craving something outside of the perimeters of your new diet. And on top of that, it usually takes a while to even see any progress on your body after you switch up your routines.

But if you keep up with your fitness journey, the results can be life-changing.

Here are 12 inspiring images from Reddit's ProgressPics community that show the phenomenal transformations that can occur with diet and exercise.