The 15 Best Cardio Machines for Weight Loss

If you’re aiming for weight loss in quarantine, then you know it’s not as easy as ABC. Therefore, selecting the right kind of cardio machine which could help you lose weight is the first and the hardest step to your weight loss journey. But worry not, we have selected the best cardio machines that are the most effective for weight loss to help you get into shape!

In a hurry and don’t want to go through the whole article? Worry not, because here is the list of all the cardio machines reviewed in this article:

Product IDProduct NamePrice on Amazon
1Harvil Foldable Magnetic Exercise Bike
2ANCHEER Indoor Cycling Bike
3DeskCycle Under Desk Exercise Bike
4Sunny Health & Fitness Magnetic Rowing Machine
5Stamina Body Trac Glider 1050 Rowing Machine
6Harvil Hydraulic Rowing Machine
7NordicTrack T 6.5 S Treadmill
8Sunny Health & Fitness Treadmill
9ProForm 505 CST Treadmill
10Confidence Full Body Vibration Trainer
11Pinty Whole Body Vibration Platform
12Hurtle Fitness Vibration Platform Workout Machine
13Sunny Health & Fitness Magnetic Elliptical Trainer
14Sunny Health & Fitness SF-E902 Elliptical Machine
15Stamina In-Motion Elliptical Trainer

The following cardio machines have been categorized according to their specifications and types of exercises they can provide to help you lose weight.

Table of Contents

Exercise Bikes

Harvil Foldable Magnetic Exercise Cardio Machines for Weight loss

Best cardio machine for weight loss Harvil Exercise Bike

First up on the list of exercise bikes, we have the foldable magnetic exercise bike from Harvil which is a good cardio machine for weight loss.

Product features

  • Compact digital monitor
  • Durable and comfy backrest
  • Built-in pulse rate sensors
  • Cushioned and adjustable seat with padded seat handles
  • Pedals with strong straps
  • Front wheels for transport
  • Product weight 44 lbs
  • Comes in peach and aqua colors

The bike features a digital monitor that displays the distance you’ve covered in miles so it’s easier to keep track of your daily exercise time. It also has built-in pulse sensors to measure your heart rate during exercise. Moreover, the bike has a smooth magnetic resistance system which is accessible with a turn of the 10-level resistance knob. Furthermore, the padded seat and anti-slip design of the pedals ensure a comfy exercise routine for everyone. Another good thing about this cardio machine is that it comes in a foldable design so it is easy to carry and transport without causing any damage.

ANCHEER Indoor Cycling Bike- Best Cardio Machines for Weight Loss

Best cardio machine for weight loss ANCHEER Exercise Bike

Ancheer’s indoor cycling bike is another one in line in this list of best cardio machines for weight loss. Why go out when you can enjoy the convenience of working out on a bike in the comfort of your own home?

Product features

  • Belt drive system and 49LBS effective flywheel
  • Adjustable resistance as well as quick-stop breaking
  • Adjustable non-slip handlebars and pedals with toe cages
  • Padded seat with ergonomic design
  • Multi-functional LCD display
  • Transportation wheels in order to move the bike easily
  • Comes with 12 month warranty
  • Comes in different colors such as black, silver and yellow

The 49LBS inertia-enhanced flywheel delivers a natural ride which is smooth and quiet so your family members won’t be disturbed when you’re using it. Moreover, you can easily choose the resistance level to best suit your needs with a simple twist. Furthermore, the non-slip handlebars are also adjustable and designed to provide maximum support along with strapped pedals to keep your feet in place. The padded seat ensures you have a comfortable workout even if it’s for longer periods of time. Additionally, you can easily adjust the seat height and move forward, backward, up and down without having to exert too much energy. Therefore, your weight loss journey cannot get easier than this!

DeskCycle Under Desk Exercise Bike and Pedal Exerciser

Best Cardio Machine For weight loss DeskCycle

Third up we have Deskcycle’s pedal exerciser which is a great cardio machine for weight loss that lets you multitask right in your office! If you don’t get enough free time to do some workout, then this is the ideal cardio machine for you! You can easily paddle away while sitting on your desk and managing your office. Thus, take the comfort of home exercise to the next level with DeskCycle’s pedal exerciser

Product features

  • Low pedal height of only 10 inches
  • 8 calibrated magnetic resistance settings
  • 5 function display for speed, time, distance, calories and scan
  • Quiet operation
  • Smooth pedal motion
  • Large pedals with adjustable velcro straps

The deskcycle ensures you get exercise wherever you sit. It is designed with the lowest pedal height so it can easily fit under your office desk and provides a quiet operation so you’re not disturbing any of your colleagues while you exercise! Moreover, the smooth pedal motion lets you focus on your work and 8 resistance levels can help you choose a setting according to your needs. Furthermore, it also features a free activity logging web app where you can create an account and view your daily workout progress. If you’re someone who spends a lot of time sitting on your desk, then this is a great cardio machine that is good for weight loss and you can get exercise done without working up a sweat!

Rowing Machines

Sunny Health & Fitness Magnetic Rowing Best Cardio Machine for Weight Loss 

Best Cardio Machine for Weight Loss Sunny Health Magnetic Rowing

If you’re tired of the conventional cardio machines featuring bikes and treadmills, then look no further! Sunny Health & Fitness brings you a magnetic rowing cardio machine in order to help you with your weight loss journey while letting you feel like you’re rowing a boat!

Product features

  • Foam grip handlebars
  • Digital monitor for displaying time, count, calories and scan
  • Non-slip foot pedals
  • Transportation wheels
  • Adjustable resistance system
  • Product weight 59 lbs

Therefore, row into shape with the magnetic rowing machine in the comfort of your own home! Moreover, the machine is designed for maximum comfort with fully padded seating, larger anti-slip foot pedals and different resistance levels. Furthermore, the heavy duty steel mainframe is tested to withstand everyday wear and tear and provides the user with the challenging feel of rowing an outdoor boat. Thus, it is a great cardio machine for weight loss and abs.

Stamina Body Trac Glider 1050 Rowing Machine

Best Cardio Machine For Weight Loss Stamina Body Rowing Machine

Experience the real-world rowing feel with the Body Trac Gilder by Stamina. It’s full motion arms design simulates the actual feel of rowing on water and therefore, provides a full body cardio on this machine and is great for weight loss.

Product features

  • Full range of motion rowing
  • Multi function electronic monitor
  • Comfortable, molded seat
  • Adjustable hydraulic cylinder resistance in order to give a smooth rowing stroke
  • Foldable arms for compact storage
  • Foam padded hand grips for comfort
  • Textured footplates with straps
  • Durable steel frame construction
  • Comes with 1 year warranty on the frame as well as 90 days warranty on the parts
  • Product weight 37 lbs

Don’t be deceived by its compact size, it can provide the same energetic workout performance as those cardio machines twice its size. Keep track of your total strokes, calories burnt and workout time with the digital display and stay motivated for further exercise. Moreover, rowing is one of the best activities for cardiovascular fitness and strength, therefore, the Body Trac Glider provides you with real time sense of rowing and utilizes all your major muscle groups. Furthermore, this helps build a stronger back and active metabolism. Additionally, if you have a limited workout space, then the Trac Glider is the best cardio machine to help you with weight loss.

Harvil Hydraulic Rowing Best Cardio Machine for Weight Loss

Best Cardio Machine For Weight Loss Harvil Rowing Machine

The last on the list of rowing machines is by Harvil which is a good cardio machine and evener better for weight loss. Therefore, Harvil’s hydraulic resistance rowing machine is built to provide optimum workout with full range motion arms, adjustable hydraulic resistance and durable steel frame in order to maintain your body shape.

Product features

  • Steel frame construction in order to withstand a maximum user weight of 250 lbs
  • Adjustable hydraulic resistance as well as manual control knob
  • Easy-to-read LCD to keep track of your workout performance
  • Ergonomic design
  • Product weight 38 lbs
  • Pivoting footplates with safety straps
  • Comes with warranty

Harvil is a great choice for space saving rowing machine which is ideal for weight loss. Moreover, it comes in an ergonomic design with a molded seat that glides your every motion. The footplates are pivoted with safety straps and two different strap positions so you can row in comfort each time. Furthermore, the tension can manually be adjusted to customize your workout and fulfill your needs. In addition, the arm bar helps in your exercise for chest, shoulder and arm muscles. If you’re a fitness freak, then you don’t want to miss out on this rowing cardio machine which is perfect for weight loss.

Treadmills

NordicTrack T 6.5 S Treadmill- Best Cardio Machine for Weight loss

Best cardio machine for weight loss NordicTrack treadmill

If you’re aiming for weight loss, then a treadmill is a great cardio machine option for you. Firstly, on the list of treadmills we have NordicTrack’s treadmill which is sure in order to help you reach your fitness goals in no time! It is compatible with iFit so you have access to a large library of different workout plans. Moreover, the OneTouch system lets you control your speed and incline settings at just the touch of a single button.

Product features

  • 20 pre-installed workout plans by certified personal trainers
  • CardioGrip heart rate sensors in each handle in order to monitor heart and pulse rate
  • Intermix acoustic sound system
  • One touch control
  • Backlit display in order to track your performance
  • Digitally adjustable incline in order to intensify your workout
  • Option to create your own custom workout using Google Maps
  • Comes with lifetime frame warranty, 25 year motor warranty as well as 1 year parts warranty
  • Product weight 203 lbs

The treadmill is designed with the iFit feature which lets you run anywhere in the world and experience the streets of different cities and parks from around the world! So every time you feel a sense of monotony, change up your workout route and enjoy a whole new scenery! It also has a 5 inch backlit display to monitor your speed, time, distance and calories burned during your exercise. You can also change the incline of the machine upto 10% to help you burn more calories and reach your weight loss goal more quickly and efficiently. Furthermore, with the T 6.5 S treadmill, you choose your comfort level and let the cardio machine do the rest with the weight loss!

Sunny Health & Fitness Treadmill – Cardio Machine for Weight Loss

Best cardio machine for weight loss Sunny and Health treadmill

If you’re into fitness, then Sunny Health & Fitness provides a good range of cardio machines which are ideal for weight loss. Moreover, their treadmill comes in a folding design and soft drop system that helps you unfold the treadmill safely and hands free. So you don’t have to worry about unfolding too quickly and breaking some piece!

Product features

  • 2.20 peak HP drive system with speeds of 0.5-9 MPH
  • 3 manual options for adjusting incline levels
  • Can withstand user weight of maximum 220 lbs
  • Easy folding mechanism
  • Handrail controls in order to pause, start and stop the machine
  • 9 built-in workout programs with large LCD display
  • Convenient smartphone/tablet holder in order to fit different devices
  • Product weight 103 lbs
  • Comes in two colors; grey and pink

The treadmill by Sunny Health & Fitness provides a fun and effective workout while saving all that precious space in your home. Moreover, they provide one of the best cardio machines for weight loss at a very reasonable price. Furthermore. with the latest technology, the treadmill offers a number of user-friendly control keys which can be accessed with just one touch of you hand. It also features pre-installed 9 workout programs so you can enjoy a certified trainer’s workout plan right at home!

ProForm 505 CST Treadmill – Best Cardio Machine for Weight Loss

Proform treadmill for fat burn

Transform your boring old workout to a new and exciting challenge with ProForm’s 505 CST Treadmill. Firstly, this treadmill offers 18 different workout apps to choose from which are paired with variable speed and incline levels in order to give you the actual feel of walking on a road or up a hill. Furthermore, its ProShox design offers you impact reduction, making it feel more like natural running and is easier on your joints and muscles.

Product features

  • 2.5 chp Mach z commercial motor
  • 10% quick incline control
  • Large LCD window
  • 5″ backlit display for speed, distance, time and calories burned
  • 18 different work out apps
  • 0-10 MPH quick speed control
  • Ekg heart rate monitor
  • Compatible music port for iPod with a space saver design
  • Can withstand a maximum user weight of 325 lbs
  • iFit coach bluetooth smart enabled
  • Comes with lifetime frame warranty, 25 year motor warranty as well as 1 year parts warranty

The treadmill provides 2.5 continuous horsepower which is built for speed and endurance even during the toughest of workouts. Moreover, he different incline levels let you take your exercise to the next level with more efficient workout performance and faster weight loss results.

Vibration Platform Fitness Machines

Confidence Full Body Vibration Trainer Platform Fitness Cardio Machine for Weight Loss

Confidence Full body vibration trainer fpr fat reduction

Up next on the list of best cardio machines for weight loss, we have the full body vibration trainer platform which is the answer to low impact, moreover, easy exercise with faster results right in the comfort of your own home. Furthermore, the user-friendly console and simple navigation menu would make even the least gym enthusiast a regular! Whether you want to lose weight, improve your flexibility or build muscles, the vibration platform fitness machine would help you reach your goals in no time.

Product features

  • Improves muscle strength, circulation, metabolism, bone density as well as flexibility
  • 10 minutes workout
  • User friendly display console
  • Includes 3 built-in programs, speed controls and a heart rate monitor
  • 50 different speed settings
  • Can withstand maximum user weight of 300 lbs
  • Compact design

If you’re someone who doesn’t get enough time to workout, then this is the right cardio machine for you. Therefore, 10 minute workout on this platform vibration machine is equivalent to 60 minute workout in the conventional exercising machines. In addition, this helps save your time and let you reach your weight loss goal in less time.

Pinty Whole Body Vibration Platform Exercise Vibration Cardio Machine for Weight Loss

Pinty Whole Body Vibration Platform for fat reduction

Groove to your favorite music and stay fit with Pinty’s whole body vibration machine with Mp3 player loudspeakers. Another great cardio machine for weight loss, this vibration machine is ideal for daily full body exercise while the music provides you with an energetic beat and increases your motivation to exercise!

Product features

  • Features a 2000W motor in order to effectively shake your whole body quietly
  • 10 different preset programs and 180 speed adjustments for appropriate workout
  • Easy-to-operate LED monitor which displays speed, time, pulse, BMI as well as mode
  • Solid metal frame with weight capacity of upto 330 lbs
  • Comes with two detachable resistance straps in order to work out your arms and upper body in different positions
  • Helps relieve chronic pains, promotes blood circulation as well as muscle strength

This is a good cardio machine for weight loss as it has been proven to help improve flexibility and burn body fat as well. Moreover, it can be used as a multi-functional exercise equipment with its 2 straps on each side. Therefore, this enables you to do push-ups, yoga, plank and other exercises with your arms and upper body to stay in shape.

Hurtle Fitness Vibration Platform Workout Machine 

Hurtle Vibration Platform for burning fat

Last on the list of vibration platform cardio machines we have the Hurtle fitness vibration platform plate which is a great choice to help you lose weight and improve your overall health. In the world of passive exercise equipment, take it one step further with the platform plate design which provides controlled vibrations and helps tone your abs, thighs, calves and much more! Its dynamic oscillation motion technology uses high-powered vibrations that do the hard work and help you feel the burn while staying at one place.

Product features

  • Compact design
  • Excellent for toning abs, thighs as well as calves
  • Ideal for sports training, weight loss and burning fat
  • Next generation 3D oscillating motion technology
  • Comes with remote control as well as balance straps
  • 30 days money back guarantee
  • Product weight 32.8 lbs

Vibration machine exercises are very effective in decreasing your body fat and strengthening muscles in the lower body. That is why Hurtle brings you a cardio machine that is ideal for weight loss and you don’t have to move around much to see the difference! Moreover, this is also a budget friendly product and users have claimed to see the same weight loss results as with treadmill sessions by using the vibration machine.

Elliptical Trainers

Sunny Health & Fitness Magnetic Elliptical Machine Trainer

Sunny health Elliptical trainer for excessive calorie burn

Sunny Health & Fitness provide a wide range of cardio machines for weight loss. Moreover, their magnetic elliptical machine trainer is specifically designed to help you on your weight loss journey while not having to go to a gym at all. Additionally, the machine is equipped with a hand pulse monitoring system which allows you to control your heartbeat and maintain it according to your need. Therefore, if you keep your elevated heart rate steady and for a longer period, it burns more fat and helps in weight loss. It also features a digital monitor to keep track of your workout routine for more efficient results.

Product features

  • Micro-tension controller
  • Hand pulse monitoring system
  • Meter function
  • Large anti-slip platform
  • Smooth magnetic resistance
  • Maximum weight capacity of 220 lbs
  • Elliptical trainer with large anti-slip foot platforms and moving arms
  • Workout computer screen to measure time, speed, distance, calories and pulse functions
  • Product weight 68 lbs

The training machine also comes with adjustable leg stabilizers so if you’re on uneven ground or a carpeted area, simply turn the knobs until they are level and prevent tipping or rocking. The portable wheels make this machine easy to transport from one place to another or store it away without having to use a lot of manpower. The resistance knob lets you switch up the intensity of the workout so you can reach your weight loss goal in less time.

Sunny Health & Fitness SF-E902 Air Walk Trainer Elliptical Machine 

best cardio machine for weight loss Sunny Health Magnetic Elliptical Trainer

Another one by Sunny Health & Fitness, the air walk trainer is a great cardio machine for your weight loss goal. Moreover, it provides an aerobic workout and gives you all the benefits of stretching, walking, running, skiing and aerobic dancing without actually having to perform these exercises and damage your body. In addition, he striding motion of the machine helps deliver a slight twist to your upper and lower body and engages it for a full body workout.

Product features

  • Anti-slip pedals
  • Full body workout
  • Informative LCD monitor to display speed, distance, calories burned and time
  • Helps increase cardio respiratory fitness
  • Space saving design
  • Can withstand maximum user capacity of 220 lbs
  • 30 feet stride length
  • 8 different resistant levels
  • Magnetic tension system
  • Product weight 28 lbs

If you’re worried about maintaining your balance on this air walker, then worry not! Its non-flip footpads ensure maximum safety and can accommodate foot of all sizes while providing a solid grip so you don’t trip over. The 30 inch stride length allows you to propel your legs forward and backwards with ease and stability and help improve your lower body muscles while engaging them in this workout.

Stamina In-Motion Elliptical Cardio Machine Quick Weight Loss

Best cardio machine for weight loss Stamina In motion Elliptical Trainer

Last but not least on the list of cardio machines which are ideal for weight loss, we have the in-motion elliptical trainer by Stamina. Therefore, compact strider is a great cardio machine which can be used for sitting, standing or for pedaling in reverse motion to help you get a convenient workout right at home. Moreover, it is a great way to burn calories and help you achieve your weight loss goal, tone lower body muscles and improve your cardiovascular health.

Product features

  • Multi-function motor
  • Adjustable tension dial
  • Forward or reverse motion during exercise
  • Textured pedals for added comfort
  • Steady steel construction
  • Multiple movement options
  • Compact design for easy portability
  • Great for gamers
  • Product weight 24 lbs
  • Comes in different colors; black, green and orange

If you’re a gamer, then this is a great option for you to help with your daily exercise while sitting in one place, gaming and exercising at the same time! The elliptical machines provide efficient cardio results and can help you stay fit and lose weight through a low impact routine so you don’t have to go running and jogging in the park to see the results.

Do Cardio Machines Actually Help You Lose Weight?

Do Cardio machines help you lose weight?

Cardio machines are an appropriate complement to a complete weight loss program. But it’s important to incorporate other forms of exercise into your life. Therefore, in order to reach an optimal level of workout intensity you need the best cardio machine for weight loss.

Whether gym machines really help you lose weight depends on you as much as the machine. The way you use the machine and how often will determine how many calories you can burn. But your outside behavior, including how much you eat and whether you get any other activity throughout the day, also factors in. Keep in mind that while resistance machines burn some calories, they are mainly for muscle building. The only gym machines that burn some calories, and can help with weight loss, are the cardio machines.

Weight loss basics

Basics of weight loss

No magic machine alone will help you lose weight, even a cardio machine. The formula for weight loss is basic. Burn more calories than you consume, thus causing your body to dig into its fat stores. How many calories you need daily to fulfill your basic requirements depends on few things. Such as your age, gender and level of physical activity. If you consume 100 more calories than required each day and burn those 100 calories on a cardio machine, you won’t gain weight. But your won’t lose it, either. But if you burn 150 calories on a cardio machine, that can lead to weight loss.

Losing 1 pound

Generally, a 3,500 calorie loss will lead to 1 pound of weight loss. Since the Centers for Disease Control and Prevention and other health organizations consider a loss of 1 to 2 pounds per week to be a healthy rate. It requires creating a deficit of 500 to 1,000 calories per day. Unless your exercise is very intense, you will most likely need to create that deficit through a combination of activity and reduced intake. Of course, cardio machines aren’t the only way to burn calories. Anything you do, even sitting, uses some calories. However, using a cardio machine at the gym is an efficient and easy tracking way to burn extra calories during a weight loss program.

Frequency

Getting about 150 minutes of moderate cardio activity each week is enough. Which is the equal to walking briskly on a treadmill. It is usually enough to maintain your weight. One way to burn enough calories to lose weight is to double the frequency. Meaning you’d do at least 300 minutes of brisk walking or pedaling an elliptical trainer or stationary bike at a stable intensity. While 300 minutes on a cardio machine can take a big chunk out of your week. You can also lose weight by getting 300 minutes of combined moderate activity each week. For example, you could do 30 minutes on a cardio machine five days per week. Along with another 30 minutes broken into at least 10 minute intervals. Which includes walking, housework, climbing stairs or other normal activities.

Intensity

A normal intensity workout is when you reach between 50 and 75 percent of your maximum heart rate. If you can reach between 75 and 90 percent of your maximum heart rate, you can burn the same calories in about half the time. A very broad rule of thumb for calculating your maximum heart rate is 220 minus your age. However, easier than actually taking your pulse rate is using the talk/sing test. At moderate intensity you should be able to talk but not sing. But at higher intensities, talking becomes difficult. At 75 to 85 percent intensity, you may only be able to talk in “huffs.” At higher intensities you may find talking at all very difficult. While higher intensities will burn calories faster, if you haven’t been very active, you should always start at 50 to 75 percent and work up slowly.

Benefits of Cardio Training

Benefits of Cardio Training

Cardio training refers to any type of activity that involves and places a stress on the respiratory system. In other words, any activity that increases your heart rate and breathing rate can be used as a form of cardio exercise. Activities such as brisk walking, running, cutting the grass, gardening, dancing, playing with your children, or participating in an exercise class at your local gym can all be considered forms of cardiovascular exercise.

Cardio training causes the heart, lungs and circulatory system to work harder in support of working muscles. Cardio training increases the need for blood and nutrients in working muscles and increases the amount of waste products that must be removed from those muscles.

Regular cardio exercise can help you to lose weight, reduce stress, decrease fatigue and improve sports performance. Other powerful benefits of regular cardio training include a decreased risk of; obesity, coronary artery disease, type II diabetes, high blood pressure, osteoporosis, high cholesterol, anxiety and certain types of cancer. 

It sounds almost like the magic bullet. Cardiovascular health may be a better predictor of mortality than obesity according to the British Journal of Sports Medicine. So get your daily dose, whether it is a walk after dinner or a workout in the gym. Get that heart pumping and blood flowing!

Choosing a Cardio Exercise

What Cardio Exercises to do?

Your first step in setting up a program is to figure out what kind of activities you’d like to do. Therefore, the trick is to think about what’s accessible to you, what fits your personality and what you’d feel comfortable fitting into your life. If you like to go outdoors, running, cycling, or walking are all good choices.

If you prefer going to the gym, you have access to many more options in the form of machines like stationary bikes, elliptical trainers, treadmills, rowing machines, climbers, the pool, and more.

You have so many choices but, the trouble is, you may not even know what you like yet. You may have to try several different activities before you find one that works for you. This is the experiment we all have to take part in and it can be hit or miss so don’t be afraid to try something and, if it doesn’t work, move on to something else.

Do something you enjoy or at least something you can tolerate. If you hate gym workouts, don’t force yourself onto a treadmill. Walk, jog, or bike outdoors to enjoy the scenery. If you like socializing, consider sports, group fitness, working out with a friend or a walking club.

Conclusion

There is a vast variety of cardio machines which are ideal for weight loss but it is up to you to decide which one you need to fulfill all your workout requirements. Losing weight can be a bit challenging in the start but with the right cardio machine and fitness plan, you can easily turn your dream of getting fit and smart into reality! All you need to do is invest in a good cardio machine and spare some time from your everyday routine and focus on your weight loss goal and you’ll achieve it in no time!

Hope you liked the article and it helped you in buying the right cardio machine for your weight loss program! Have any questions? Feel free to contact us.

Frequently Asked Questions

Should you go for cardio or weight training?

Depends on your goals. If your goal is fat loss, cardio is the way to go. If your goal is to bulk up, weight training it is then. However, you should try to do a mix of both.

How much cardio per day is needed?

According to experts, whatever exercise you are doing for cardio, you should do it for at least 10 minutes a day. For moderate intensity cardio workouts like brisk walk, 30 minutes a day is recommended.

Is it okay to run everyday?

Short answer is no. You need to give yourself breaks in between the days so your body can repair itself.