Aerobic exercise (also known as endurance activities, cardio or cardio-respiratory exercise) is physical exercise of low to high intensity that depends primarily on the aerobic energy-generating process. "Aerobic" is defined as "relating to, involving, or requiring oxygen", and refers to the use of oxygen to meet energy demands during exercise via aerobic metabolism adequately. Aerobic exercise is performed by repeating sequences of light-to-moderate intensity activities for extended periods of time. Aerobic exercise may be better referred to as "solely aerobic", as it is designed to be low-intensity enough that all carbohydrates are aerobically turned into energy via mitochondrial ATP production. Mitochondrion are organelles that rely on oxygen for the metabolism of carbs, proteins, and fats. Aerobic exercise causes a remodeling of mitochondrial cells within the tissues of the liver and heart.
Examples of cardiovascular or aerobic exercise are medium- to long-distance running or jogging, swimming, cycling, stair climbing and walking.
Archibald Hill, a British physiologist, introduced the concepts of maximal oxygen uptake and oxygen debt in 1922. German physician Otto Meyerhof and Hill shared the 1922 Nobel Prize in Physiology or Medicine for their independent work related to muscle energy metabolism. Building on this work, scientists began measuring oxygen consumption during exercise. Henry Taylor at the University of Minnesota and Swedish scientists Per-Olof Åstrand and Bengt Saltin made notable contributions in the 1950s and 60s. Contributions were also made by the Harvard Fatigue Laboratory, Copenhagen Muscle Research Centre as well as various German universities.
After World War II, health-oriented recreational activities such as jogging became popular. The Royal Canadian Air Force Exercise Plans, developed by Dr. Bill Orban and published in 1961, helped to launch modern fitness culture.
Physical therapists Col. Pauline Potts and Dr. Kenneth H. Cooper, both of the United States Air Force, advocated the concept of aerobic exercise. In the 1960s, Cooper started research into preventive medicine. He conducted the first extensive research on aerobic exercise on over 5,000 U.S. Air Force personnel after becoming intrigued by the belief that exercise can preserve one's health. In 1966 he coined the term "aerobics". Two years later, in 1968, he published a book of the same name. In 1970, he created the Cooper Institute for non-profit research and education devoted to preventive medicine. He published a mass-market version of his book The New Aerobics in 1979. Cooper encouraged millions into becoming active and is now known as the "father of aerobics". Cooper's book inspired Jacki Sorensen to create aerobic dancing exercise routines, which grew in popularity in the 1970s in the U.S., and at the same time, Judi Missett developed and expanded Jazzercise.
In the 1970s, there was a running boom. It was inspired by the Olympics, the New-York marathon and the advent of cushioned shoes.
Aerobics at home became popular worldwide after the release of Jane Fonda's Workout exercise video in 1982. Step aerobics was popular in the 1990s, driven by a step product and program from Reebok shoes.
This section needs additional citations for verification. (October 2011)
Aerobic exercise comprises innumerable forms. In general, it is performed at a moderate level of intensity over a relatively long period of time. For example, running a long distance at a moderate pace is an aerobic exercise, but sprinting is not. Playing singles tennis, with near-continuous motion, is generally considered aerobic activity, while activities with brief bursts of energetic movement within longer periods of casual movement may not be aerobic. Some sports are thus inherently "aerobic", while other aerobic exercises, such as fartlek training or aerobic dance classes, are designed specifically to improve aerobic capacity and fitness. It is most common for aerobic exercises to involve the leg muscles, primarily or exclusively. There are some exceptions. For example, rowing to distances of 2,000 meters or more is an aerobic sport that exercises several major muscle groups, including those of the legs, abdominals, chest, and arms.
- Hiking on flat ground
- Bicycling at less than 10 mph
- Moderate walking (about 3.5 mph)
- Downhill skiing
- Tennis (doubles)
- Light yard work
- Brisk walking (about 4.5 mph)
- Bicycling at more than 10 mph
- Hiking uphill
- Cross-country skiing
- Stair climbing
- Jumping rope
- Tennis (singles)
- Heavy yard work
Versus anaerobic exerciseEdit
Aerobic exercise and fitness can be contrasted with anaerobic exercise, of which strength training and short-distance running are the most salient examples. The two types of exercise differ by the duration and intensity of muscular contractions involved, as well as by how energy is generated within the muscle.
New research on the endocrine functions of contracting muscles has shown that both aerobic and anaerobic exercise promote the secretion of myokines, with attendant benefits including growth of new tissue, tissue repair, and various anti-inflammatory functions, which in turn reduce the risk of developing various inflammatory diseases. Myokine secretion in turn is dependent on the amount of muscle contracted, and the duration and intensity of contraction. As such, both types of exercise produce endocrine benefits.
In almost all conditions, anaerobic exercise is accompanied by aerobic (in the presence of oxygen) exercises because the less efficient anaerobic metabolism must supplement the aerobic system due to energy demands that exceed the aerobic system's capacity. During anaerobic exercise, the body must generate energy through other processes than aerobic metabolism, including glycolysis paired with lactic acid fermentation, and the phosphocreatine system to generate energy in the form of ATP. Common kettlebell exercises combine aerobic and anaerobic aspects. Allowing 24 hours of recovery between aerobic and strength exercise leads to greater fitness.
Depending on the intensity of exercise, the body preferentially utilizes certain fuel forms to meet energy demands. The two main fuel sources for aerobic exercise in the body include fat (in the form of adipose tissue) and glycogen. At lower intensity aerobic exercise, the body preferentially uses fat as its main fuel source for cellular respiration, however as intensity increases the body preferentially uses glycogen stored in the muscles and liver or other carbohydrates, as it is a quicker source of energy. Aerobic exercise is not a very efficient way to burn fat in comparison to other forms of exercise, as in order to preferentially burn fat one should exercise at lower intensities, which decreases the overall amount of calories burned per unit of time.
Among the recognized health benefits of doing regular aerobic exercise are:
- Strengthens the muscles involved in respiration, to facilitate the flow of air in and out of the lungs
- Strengthens and enlarges the heart muscle, to improve its pumping efficiency and reduce the resting heart rate, known as aerobic conditioning
- Improves circulation efficiency and reducing blood pressure
- Increases pain tolerance
- Maintains independence in later life
- Increases the total number of red blood cells in the body, facilitating transport of oxygen
- Improves mental health, including reducing stress and lowering the incidence of depression, as well as increased cognitive capacity.
- Slightly reduced depression may also be observed, especially if aerobic exercises are used as additional treatment for patients with a hematological malignancy 
- Reduces the risk for diabetes (One meta-analysis has shown, from multiple conducted studies, that aerobic exercise does help lower Hb A1Clevels for type 2 diabetics.)
- Moderates the risk of death due to cardiovascular problems
- Reduces risk for heart disease, blood clots, and stroke
- Lowers total cholesterol
- Raises high-density lipoprotein
- Promotes weight loss
- Prevents bone loss
- Lowers inflammation
- Prevents vascular dysfunction 
- Improves Episodic memory
High-impact aerobic activities (such as jogging or using a skipping rope) can:
- Stimulate bone growth
- Reduce the risk of osteoporosis for both men and women
Some drawbacks of aerobic exercise include:
- Overuse injuries because of repetitive, high-impact exercise such as distance running
- Not an effective form of fat loss. Beginners may experience a fast fat loss process but experienced practitioners will combine scientific diets and anaerobic exercise to get the ideal outcome
- Aerobic exercise may not be as efficient as other exercise methods for eliciting the same improvements in body composition, cardiovascular health, and overall health. For example, HIIT exercise has been shown to provide the same benefits in a fraction of the time spent exercising per week.
Both the health benefits and the performance benefits, or "training effect", require that the duration and the frequency of exercise both exceed a certain minimum. Most authorities suggest at least twenty minutes performed at least three times per week.
For older adultsEdit
The National Institute on Aging's Go4Life initiative has a YouTube channel with suggested exercises and related materials for older adults.
The NIA recommends a number of measures for safety during aerobic exercise:
- Light activity as a warm up and a cool down.
- Endurance activities should not cause dizziness, chest pain or pressure, or a feeling like heartburn.
- Drinking of liquids while exercising, unless instructed otherwise by a doctor.
- Awareness of your surroundings when exercising outdoors.
- Dressing in layers to allow addition or removal of clothes as needed for hot and cold weather.
- Use of safety equipment, such as a helmet when bicycling, to prevent injuries.
- Higher intensity exercise, such as High-intensity interval training (HIIT), increases the resting metabolic rate (RMR) in the 24 hours following high intensity exercise, ultimately burning more calories than lower intensity exercise; low intensity exercise burns more calories during the exercise, due to the increased duration, but fewer afterwards.
Aerobic exercise has long been a popular approach to achieving weight loss and physical fitness, often taking a commercial form.
- In the 1970s, Judi Sheppard Missett helped create the market for commercial aerobics with her Jazzercise program, at the same time as Jacki Sorensen was expanding her system of aerobic dancing.
- In the 1980s, Richard Simmons hosted an aerobic exercise show on television, and followed Jane Fonda's lead by releasing a series of exercise videos.
- In the 1990s, Billy Blanks's Tae Bo helped popularize cardio-boxing workouts that incorporated martial arts movements. Reebok shoes popularized step aerobics with their Reebok Step device and training program.
- ^ a b c "Four Types of Exercise Can Improve Your Health and Physical". National Institute on Aging. Retrieved 2021-03-31.
- ^ a b "Exercise and Physical Fitness". medlineplus.gov. Retrieved 2020-04-30.
- ^ a b Plowman SA, Smith DL (1 June 2007). Exercise Physiology for Health, Fitness, and Performance. Lippincott Williams & Wilkins. p. 61. ISBN 978-0-7817-8406-1. Retrieved 13 October 2011.
- ^ Can stress heal?. Thomas Nelson Inc. 1997. p. 40. ISBN 978-0-7852-8315-7. Retrieved 19 October 2011.
- ^ McArdle WD, Katch FI, Katch VL (2006). Essentials of exercise physiology. Lippincott Williams & Wilkins. p. 204. ISBN 978-0-7817-4991-6. Retrieved 13 October 2011.
- ^ O’Reilly, Colleen L.; Miller, Benjamin F.; Lewis, Tommy L. (2023-01-01). "Exercise and mitochondrial remodeling to prevent age-related neurodegeneration". Journal of Applied Physiology. 134 (1): 181–189. doi:10.1152/japplphysiol.00611.2022. ISSN 8750-7587. PMC 9829476. PMID 36519568.
- ^ Hale T (February 2008). "History of developments in sport and exercise physiology: A. V. Hill, maximal oxygen uptake, and oxygen debt". Journal of Sports Sciences. 26 (4): 365–400. doi:10.1080/02640410701701016. PMID 18228167. S2CID 33768722.
- ^ Bassett DR, Howley ET (May 1997). "Maximal oxygen uptake: "classical" versus "contemporary" viewpoints". Medicine and Science in Sports and Exercise. 29 (5): 591–603. doi:10.1097/00005768-199705000-00002. PMID 9140894.
- ^ "The Nobel Prize in Physiology or Medicine 1922". NobelPrize.org. Retrieved 2018-10-11.
- ^ Schantz P (December 2015). "Along paths converging to Bengt Saltin's early contributions in exercise physiology". Scandinavian Journal of Medicine & Science in Sports. 25 Suppl 4 (S4): 7–15. doi:10.1111/sms.12594. PMC 4670711. PMID 26589112.
- ^ Seiler S (2011). "A Brief History of Endurance Testing in Athletes" (PDF). Sportscience. 15 (5).
- ^ "History of Exercise Physiology". Human Kinetics Europe. Retrieved 2018-10-11.
- ^ Fit Bodies. Fitness Culture and Gym Sassatelli, Roberta. 2006.
- ^ Krucoff C (1998-06-22). "Going Back to the Basics With Calisthenics". Los Angeles Times. ISSN 0458-3035. Retrieved 2018-10-08.
In fact, the popularity of the Royal Canadian Air Force's calisthenics program in the late 1950s helped launch the modern fitness movement.
- ^ "Five basic exercises for fitness in 1961". CBC Archives. Retrieved 2018-10-08.
The program became famous worldwide.
- ^ Zhu W (June 2018). "What a Journey! What a Contribution!-An Interview With Dr. Kenneth H. Cooper, the 'Father of Aerobics'". Research Quarterly for Exercise and Sport. 89 (2): 135–142. doi:10.1080/02701367.2018.1452488. PMID 29693511. S2CID 13824541.
- ^ Cooper KH (1983) . Aerobics (revised, reissue ed.). Bantam Books. ISBN 978-0553274479.
- ^ Netburn D (March 30, 2009). "Dr. Kenneth Cooper got a nation moving through aerobics". Los Angeles Times.
- ^ ""Father of Aerobics" Kenneth Cooper, MD, MPH to receive Healthy Cup Award from Harvard School of Public Health". News. 2008-04-16. Retrieved 2018-10-08.
- ^ "Dr. Kenneth Cooper and How He Became Known as the Father of Aerobics". Club Industry. 2008-09-01. Archived from the original on 2018-10-09. Retrieved 2018-10-08.
- ^ Stracher C. "Running on Empty: An American Sports Tradition Fades". Retrieved 2018-10-11.
- ^ Andreasson J, Johansson T (1 January 2014). "The Fitness Revolution. Historical Transformations in the Global Gym and Fitness Culture". Sport Science Review. 23 (3–4). doi:10.2478/ssr-2014-0006. S2CID 73636110.
- ^ Stern M (2008). "The Fitness Movement and the Fitness Center Industry, 1960-2000" (PDF). Business and Economic History On-line. Retrieved 2018-10-07.
- ^ "Aerobic Exercise Health: What Is It, Benefits & Examples". Cleveland Clinic. Retrieved 2021-11-19.
- ^ "Give your heart a workout: MedlinePlus Medical Encyclopedia". medlineplus.gov. Retrieved 2021-03-31.
- ^ a b c Mellett LH, Bousquet G (April 2013). "Cardiology patient page. Heart-healthy exercise". Circulation. 127 (17): e571–e572. doi:10.1161/CIRCULATIONAHA.112.000880. PMID 23630089.
- ^ "Anaerobic: MedlinePlus Medical Encyclopedia". medlineplus.gov. Retrieved 2022-03-26.
- ^ Patel H, Alkhawam H, Madanieh R, Shah N, Kosmas CE, Vittorio TJ (February 2017). "Aerobic vs anaerobic exercise training effects on the cardiovascular system". World Journal of Cardiology. 9 (2): 134–138. doi:10.4330/wjc.v9.i2.134. PMC 5329739. PMID 28289526.
- ^ Robineau J, Babault N, Piscione J, Lacome M, Bigard AX (March 2016). "Specific Training Effects of Concurrent Aerobic and Strength Exercises Depend on Recovery Duration". Journal of Strength and Conditioning Research. 30 (3): 672–683. doi:10.1519/JSC.0000000000000798. PMID 25546450. S2CID 30607588.
- ^ Sporer BC, Wenger HA (November 2003). "Effects of aerobic exercise on strength performance following various periods of recovery". Journal of Strength and Conditioning Research. 17 (4): 638–644. doi:10.1519/1533-4287(2003)017<0638:eoaeos>2.0.co;2. PMID 14636098. S2CID 22340684.
- ^ Murray B, Rosenbloom C (April 2018). "Fundamentals of glycogen metabolism for coaches and athletes". Nutrition Reviews. 76 (4): 243–259. doi:10.1093/nutrit/nuy001. PMC 6019055. PMID 29444266.
- ^ Harris MB, Kuo CH (2021). "Scientific Challenges on Theory of Fat Burning by Exercise". Frontiers in Physiology. 12: 685166. doi:10.3389/fphys.2021.685166. PMC 8290478. PMID 34295263.
- ^ "Aerobic exercise: the health benefits". myDr. 11 January 2010. Retrieved 17 May 2016.
- ^ "Benefits of Exercise". medlineplus.gov. Retrieved 2020-04-30.
- ^ Mairbäurl H (2013). "Red blood cells in sports: Effects of exercise and training on oxygen supply by red blood cells". Frontiers in Physiology. 4: 332. doi:10.3389/fphys.2013.00332. ISSN 1664-042X. PMC 3824146. PMID 24273518.
- ^ "Cardiovascular fitness is linked to intelligence".[dead link]
- ^ Knips L, Bergenthal N, Streckmann F, Monsef I, Elter T, Skoetz N, et al. (Cochrane Haematological Malignancies Group) (January 2019). "Aerobic physical exercise for adult patients with haematological malignancies". The Cochrane Database of Systematic Reviews. 1 (1): CD009075. doi:10.1002/14651858.CD009075.pub3. PMC 6354325. PMID 30702150.
- ^ Snowling, N. J., & Hopkins, W. G. (2006). Effects of Different Modes of Exercise Training on Glucose Control and Risk Factors for Complications in Type 2 Diabetic Patients A meta-analysis. Diabetes Care, 29(11), 518–2527. http://doi.org/10.2337/dc06-1317
- ^ Barha CK, Dao E, Marcotte L, Hsiung GR, Tam R, Liu-Ambrose T (October 2021). "Cardiovascular risk moderates the effect of aerobic exercise on executive functions in older adults with subcortical ischemic vascular cognitive impairment". Scientific Reports. 11 (1): 19974. Bibcode:2021NatSR..1119974B. doi:10.1038/s41598-021-99249-1. PMC 8497597. PMID 34620933.
- ^ Gioscia-Ryan RA, Clayton ZS, Zigler MC, Richey JJ, Cuevas LM, Rossman MJ, et al. (February 2021). "Lifelong voluntary aerobic exercise prevents age- and Western diet- induced vascular dysfunction, mitochondrial oxidative stress and inflammation in mice". The Journal of Physiology. 599 (3): 911–925. doi:10.1113/JP280607. PMC 7856030. PMID 33103241.
- ^ Aghjayan SL, Bournias T, Kang C, Zhou X, Stillman CM, Donofry SD, et al. (2022-02-17). "Aerobic exercise improves episodic memory in late adulthood: a systematic review and meta-analysis". Communications Medicine. 2 (1): 15. doi:10.1038/s43856-022-00079-7. ISSN 2730-664X. PMC 9053291. PMID 35603310. S2CID 246963477.
- ^ Tong X, Chen X, Zhang S, Huang M, Shen X, Xu J, Zou J (2019-04-18). "The Effect of Exercise on the Prevention of Osteoporosis and Bone Angiogenesis". BioMed Research International. 2019: 8171897. doi:10.1155/2019/8171897. PMC 6500645. PMID 31139653.
- ^ Ito S (July 2019). "High-intensity interval training for health benefits and care of cardiac diseases – The key to an efficient exercise protocol". World Journal of Cardiology. 11 (7): 171–188. doi:10.4330/wjc.v11.i7.171. PMC 6763680. PMID 31565193.
- ^ 'aerobic exercise', Food and Fitness: A Dictionary of Diet and Exercise, Michael Kent, Oxford University Press, 1997.
- ^ "Exercises for Older Adults – YouTube". www.youtube.com. Retrieved 2023-01-20.
- ^ "Exercise and Physical Activity". National Institute on Aging. Retrieved 2021-03-31.
- ^ "Go4Life: the NIA health education campaign". National Institute on Aging. Retrieved 2021-03-31.
- ^ East Tennessee State University Thesis Archived March 19, 2007, at the Wayback Machine
- ^ Hallett V (July 8, 2014). "Jazzercise: After 45 years, it's still here, and it's still evolving". The Washington Post. Retrieved July 8, 2014.
- ^ McCormack P (October 16, 1981). "Womans' World: Aerobic Dancing: 'hips, hips' away!". United Press International. Retrieved September 17, 2020.
- ^ "This Day in History: April 24: 1982: Jane Fonda's First Workout Video Released". History Channel. Retrieved March 7, 2023.
- ^ "Billy Blanks Is Fit, Fired Up, and Still Swinging at 65". Men's Health. 2021-08-10. Retrieved 2023-03-07.
- ^ Hartford T (September 23, 2019). "Step Reebok's Rise To Success… With Angel Martinez". SGB Online. Retrieved September 20, 2020.
- Aberg MA, Pedersen NL, Torén K, Svartengren M, Bäckstrand B, Johnsson T, et al. (December 2009). "Cardiovascular fitness is associated with cognition in young adulthood". Proceedings of the National Academy of Sciences of the United States of America. 106 (49): 20906–20911. Bibcode:2009PNAS..10620906A. doi:10.1073/pnas.0905307106. PMC 2785721. PMID 19948959.
- Cooper KD. The New Aerobics. Eldora, Iowa: Prairie Wind.
- Donatelle RJ (2005). Health: The Basics (7th ed.). San Francisco: Pearson Benjamin Cummings. ISBN 978-0-8053-7795-8.
- Friedman D (2022). Let's Get Physical: How Women Discovered Exercise and Reshaped the World. New York: G. P. Putnam's Sons. ISBN 9780593188422. Archived from the original on 8 April 2022.
- Guiney H, Machado L (February 2013). "Benefits of regular aerobic exercise for executive functioning in healthy populations". Psychonomic Bulletin & Review. 20 (1): 73–86. doi:10.3758/s13423-012-0345-4. PMID 23229442. S2CID 24190840.
- Hinkle JS (1992). School Children and Fitness: Aerobics for Life. ERIC Clearinghouse.
- Rendi M, Szabo A, Szabó T, Velenczei A, Kovács A (March 2008). "Acute psychological benefits of aerobic exercise: a field study into the effects of exercise characteristics". Psychology, Health & Medicine. 13 (2): 180–4. doi:10.1080/13548500701426729. PMID 18350462. S2CID 24444650.
- Media related to Aerobic exercise at Wikimedia Commons