You might. Still, you should try to eat a healthy amount of food and not stuff yourself after a fast. Quality still counts. But even among people who eat the same number of calories, those who fast tend to have lower blood pressure, higher insulin sensitivity, more appetite control, and easier weight loss.

This is an off-and-on type of fasting. There are three main types that doctors have studied and people have used for weight loss and improved health:

• Time-restricted feeding
• Alternate-day fasting
• Modified fasting

This means you do all your eating in a certain stretch of the day, often around 8-12 hours. One easy way to do this is to skip one meal. If you finish dinner by 8 p.m., you've already achieved 12 hours of your fast by 8 a.m. Make it to noon for lunch, and you've fasted for 16 hours. You could also stop eating after lunch until breakfast the next morning.

It's sometimes called “complete” alternate day fasting because the time when you don't eat lasts a full 24 hours. You follow that with one or more “feast” days when you can eat as much as you want. Even though the studies are very limited, the results suggest that alternate-day fasting can lead to weight loss and improve health. But it may be pretty hard to stick to it over the long term.

This type allows you to eat around 20% to 25% of your normal daily energy needs on scheduled fast days -- just enough to remind you what you're missing! One popular version, the 5:2 diet, requires 2 days a week (not in a row) of 24-hour “fasting” except for a very light meal. On the other 5 days of the week, you can eat whatever you want.

Complete, alternate-day fasting could be very hard to stick with over the long term. But other versions of fasting seem to get easier over time. You and your doctor may want to look into the specific plans to see what might be best for you.

Some studies show that fasting might help people with diabetes or prediabetes control blood sugar, improve insulin sensitivity, and lose weight. Other recent research looking at time-restricted fasting disputes some of these claims. If you have either of these conditions, it's very important to talk to your doctor before you make any changes to your medication, insulin use, or eating habits.

Weight training may help you shed more body fat -- but not muscle -- when added to any weight loss program. Aerobic exercise like running, swimming, or biking while on a time-restricted eating plan might help your cholesterol levels as well as cut down on belly fat. Still, you need good fuel. Make sure you cover your nutritional needs.