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How my body changed when I started running?

Author

Emily Ross

Published Jan 12, 2026

Running changes your body by burning body fat and building muscles. Expect to lose fat at the top of your thighs, build stomach muscles of steel, and a butt to die for the weight. When you run you're really working your gluteal muscles.

How quickly does running change your body?

It can take 4 to 6 weeks to notice changes in your aerobic ability and for the actual training effect being felt. Likewise, the more experienced you are, the less you will “feel” the benefits from a long run since you aerobic system is already quite developed.

Does running change your body shape?

Running is a great way to get in shape and lose weight. But it's a high-impact exercise. High-impact workouts can be harder on your body than low-impact exercises like walking.

What happens to your body when you first start running?

Your muscles become used to the stresses of running, and you notice yourself being able to run a little faster and farther. Perhaps you even notice that you've lost a bit of fat. "Your body feels stronger, and you notice greater gratitude for your body's capabilities and functions," says Bushman.

How much can running change your body?

As a form of cardio exercise that's easily accessible, running is one of the most straightforward ways to get the important benefits of exercise. Since it improves aerobic fitness, running is a great way to help improve cardiovascular health. Plus, it burns calories and can build strength, among other things.

45 related questions found

What happens if you run everyday for a month?

Running every day may increase your risk for an overuse injury. Overuse injuries result from taking on too much physical activity, too fast, and not allowing the body to adjust. Or they can result from technique errors, such as running with poor form and overloading certain muscles.

Will running tone your stomach?

While most runners don't run solely to get abs or tone their body, it can be a nice side benefit of the sport. While running is primarily a cardio exercise, it does strengthen and tone many muscles in your body, including your abs.

Does running reduce belly fat?

Studies have found that moderate-to-high aerobic exercise like running can reduce belly fat, even without changing your diet ( 12 , 13 , 14 ). An analysis of 15 studies and 852 participants found that aerobic exercise reduced belly fat without any change in diet.

Can I run everyday as a beginner?

For beginners, most experts recommend running three to four days a week. If you've been running for a while and know how to pace yourself, you may be able to up that total to five days a week.

How many days a week should you run?

Most experts agree that beginners should plan to run three to four days per week with at least one day of complete rest and optional cross-training on the other days. The duration of your initial run/walk sessions should be 20-30 minutes, increasing the percentage of time spent running in subsequent workouts.

Does running get toned?

The muscles which are used to power you through your run are quadriceps, hamstrings, calves and glutes. Regular running will definitely get you a toned, fit body including a firm butt.

How running changes a woman's body?

An American study found that running women produce a less potent form of oestrogen than their sedentary counterparts. As a result, female runners cut by half their risks of developing breast and uterine cancer, and by two thirds their risk of contracting the form of diabetes that most commonly plagues women.

What is runner's stomach?

Runner's stomach occurs when our digestive system experience a large amount of agitation from the act of running or high-endurance exercise. There are certain diet tips you can follow to avoid having an accident mid-run. Photograph courtesy of Shutterstock.

Is jogging 4 times a week enough?

Running only four days per week can still be a very good way to burn enough calories to result in weight loss. The distance you run on those four days is the determining factor as opposed to the number of minutes you are running. The faster pace you can run and the longer you can run, the more calories you will burn.

Is 30 minutes of running a day enough?

Running for 30 minutes per day, five days a week is plenty if you're looking to lose weight. It is essential to remain consistent with exercise, nutrition, sleep, and hydration if you want to see real progress. Just be sure to build up your running gradually to reduce your risk of injury.

What's a good distance to run everyday?

Beginning runners should start with two to four runs per week at about 20 to 30 minutes (or roughly 2 to 4 miles) per run. You may have heard of the 10 Percent Rule, but a better way to increase your mileage is to run more every second week. This will help your body adapt to your new hobby so you don't get hurt.

How many minutes should I run a day to lose weight?

How much should you run to lose weight? According to the World Health Organization, adults should aim for between 150 and 300 minutes of exercise per week. This means that even running for 30 minutes five times a week could help you see results in your weight management.

What do runners do on rest days?

“I recommend 2 tips for the best active rest day for runners: Cycling and Hiking. Cycling provides a good light exercise for runners on their rest day because the motion is similar to running with little to no impact on the joints. The goal of cycling should be to ride comfortably in the low intensity on the rest days.

Is it better to run in the morning or evening for weight loss?

Morning Exercise

In fact, workout in the morning can help you sleep better as compared to exercising in the evening. According to a study by the University of New South Wales, it was found that working out in the morning (before breakfast) is the most effective time for cardio-exercises especially for losing weight.

What is the best type of running to lose weight?

Interval training is definitely the most effective running program to lose weight. The periods of high intensity increase your muscles' stimulus, thus achieving a much greater effect in the same amount of time as a moderate base run.

What should I eat before I run to lose weight?

So, if you're running to lose weight, add these eight foods to your fueling plan:

  • Avocado.
  • Water.
  • Full-fat Greek yogurt.
  • Eggs.
  • Frozen berries.
  • Nuts.
  • Lean beef.
  • Whole grains.

How does running flatten your stomach?

"Aerobic exercise such as running, swimming or rowing raises metabolism during and after the activity, making it less likely that calories will be stored around the abdominal area, or anywhere else, as fat," Sutton says.

Is running good for your skin?

“Increasing your circulation with cardio delivers a greater amount of oxygen and nutrients to your skin, which helps repair it and increase collagen production,” says Kanchanapoomi Levin. Plus, enhanced blood flow helps skin cells regenerate, she adds—meaning cycling could actually be anti-aging.

Can running make your butt bigger?

Yes, running builds muscles in the glutes, but it depends on the type of running. Sprinting activates type II fibers, which are larger and more able to increase muscle size, whereas distance running uses smaller type I fibers that are better for endurance.

Are you fit if you can run 5K?

Running a 5K is a fairly achievable feat that's ideal for people who are just getting into running or who simply want to run a more manageable distance. Even if you've never run a 5K race, you can probably get in shape within a few months by dedicating yourself to the right training program.