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Aerobic exercise
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<h2 id="history">History</h2> <p class="note">See also: <a href="/facts/Exercise/egYQjt8A">Exercise § History</a>, <a href="/facts/Fitness_culture/rF9wkFaR">Fitness culture</a>, and <a href="/facts/History_of_physical_training_and_fitness/allAmBuR">History of physical training and fitness</a></p> <p><a href="/facts/Archibald_Hill/ad0uLQWg">Archibald Hill</a>, a British physiologist, introduced the concepts of <a href="/facts/VO2_max/5eCkeysG">maximal oxygen uptake</a> and oxygen debt in 1922.<a class="footnote-ref" id="fnref:14" href="#fn:14"><sup>14</sup></a><a class="footnote-ref" id="fnref:15" href="#fn:15"><sup>15</sup></a> German physician <a href="/facts/Otto_Fritz_Meyerhof/Y1uyQrfI">Otto Meyerhof</a> and Hill shared the 1922 <a href="/facts/Nobel_Prize_in_Physiology_or_Medicine/rlnpJX84">Nobel Prize in Physiology or Medicine</a> for their independent work related to muscle energy metabolism.<a class="footnote-ref" id="fnref:16" href="#fn:16"><sup>16</sup></a> Building on this work, scientists began measuring oxygen consumption during exercise. Henry Taylor at the <a href="/facts/University_of_Minnesota/vN1uQvP5">University of Minnesota</a> and Swedish scientists <a href="/facts/Per-Olof_%C3%85strand/twfKAfAd">Per-Olof Åstrand</a> and <a href="/facts/Bengt_Saltin/nMsYqw7R">Bengt Saltin</a> made notable contributions in the 1950s and 60s.<a class="footnote-ref" id="fnref:17" href="#fn:17"><sup>17</sup></a> Contributions were also made by the Harvard Fatigue Laboratory, Copenhagen Muscle Research Centre as well as various German universities.<a class="footnote-ref" id="fnref:18" href="#fn:18"><sup>18</sup></a><a class="footnote-ref" id="fnref:19" href="#fn:19"><sup>19</sup></a> </p><p>After World War II, health-oriented recreational activities such as <a href="/facts/Jogging/XQeTpmTt">jogging</a> became popular.<a class="footnote-ref" id="fnref:20" href="#fn:20"><sup>20</sup></a> The <a href="/facts/Royal_Canadian_Air_Force_Exercise_Plans/MYs1PCRh">Royal Canadian Air Force Exercise Plans</a>, developed by Dr. <a href="/facts/Bill_Orban/Yl7Pxbgx">Bill Orban</a> and published in 1961, helped to launch modern <a href="/facts/Fitness_culture/rF9wkFaR">fitness culture</a>.<a class="footnote-ref" id="fnref:21" href="#fn:21"><sup>21</sup></a><a class="footnote-ref" id="fnref:22" href="#fn:22"><sup>22</sup></a> </p><p>Physical therapists Col. Pauline Potts and Dr. <a href="/facts/Kenneth_H._Cooper/2U6NKykp">Kenneth H. Cooper</a>,<a class="footnote-ref" id="fnref:23" href="#fn:23"><sup>23</sup></a> 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<a class="footnote-ref" id="fnref:24" href="#fn:24"><sup>24</sup></a><a class="footnote-ref" id="fnref:25" href="#fn:25"><sup>25</sup></a> 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 <i>The New Aerobics</i> in 1979. Cooper encouraged millions into becoming active and is now known as the "father of aerobics".<a class="footnote-ref" id="fnref:26" href="#fn:26"><sup>26</sup></a><a class="footnote-ref" id="fnref:27" href="#fn:27"><sup>27</sup></a> Cooper's book inspired <a href="/facts/Jacki_Sorensen/72d4p796">Jacki Sorensen</a> 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 <a href="/facts/Jazzercise/gzvvGDWd">Jazzercise</a>. </p><p>In the 1970s, there was a <a href="/facts/Running_boom_of_the_1970s/M98fy9yE">running boom</a>. It was inspired by the Olympics, the New-York marathon and the advent of cushioned shoes.<a class="footnote-ref" id="fnref:28" href="#fn:28"><sup>28</sup></a> </p><p>Aerobics at home became popular worldwide after the release of <i><a href="/facts/Jane_Fonda%27s_Workout/2WHAye4n">Jane Fonda's Workout</a></i> exercise video in 1982.<a class="footnote-ref" id="fnref:29" href="#fn:29"><sup>29</sup></a><a class="footnote-ref" id="fnref:30" href="#fn:30"><sup>30</sup></a> <a href="/facts/Step_aerobics/Se8yhLHY">Step aerobics</a> was popular in the 1990s, driven by a step product and program from <a href="/facts/Reebok/kuxnf0Lt">Reebok</a> shoes. </p> <h2 id="definition">Definition</h2> <p class="note">Main article: <a href="/facts/Bioenergetic_systems/mdu3B590">Bioenergetic systems</a></p> <p>Aerobic exercise comprises innumerable forms.<a class="footnote-ref" id="fnref:31" href="#fn:31"><sup>31</sup></a> In general, it is performed at a moderate level of intensity over a relatively long period of time. For example, <a href="/facts/Running/h09J9jtb">running</a> a long distance at a moderate pace is an aerobic exercise, but <a href="/facts/Sprint_(running)/nCAnq1dj">sprinting</a> 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 <a href="/facts/Fartlek/FFcBnpr1">fartlek</a> 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, <a href="/facts/Rowing_(sport)/vN9AnU2G">rowing</a> 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. </p> <h3>Examples</h3> <p>Moderate activities<a class="footnote-ref" id="fnref:32" href="#fn:32"><sup>32</sup></a> </p> <ul><li><a href="/facts/Swimming/hnU8XbVg">Swimming</a><a class="footnote-ref" id="fnref:33" href="#fn:33"><sup>33</sup></a></li> <li><a href="/facts/Dance/s9SeYNR9">Dancing</a></li> <li><a href="/facts/Hiking/agJbxevo">Hiking</a> on flat ground</li> <li><a href="/facts/Cycling/XH6EKjAF">Bicycling</a><a class="footnote-ref" id="fnref:34" href="#fn:34"><sup>34</sup></a> at less than 10 miles per hour (16 km/h)</li> <li>Moderate <a href="/facts/Walking/Mow1X5Im">walking</a> (about 3.5 miles per hour (5.6 km/h))</li> <li><a href="/facts/Alpine_skiing/JpfFIynW">Downhill skiing</a></li> <li><a href="/facts/Doubles_(tennis)/UgwbrwD0">Tennis (doubles)</a></li> <li><a href="/facts/Softball/4aPg2eqt">Softball</a></li> <li><a href="/facts/Gardening/vj2nF0mB">Gardening</a></li> <li>Light <a href="/facts/Lawn/8j5Yf84C">yard work</a></li> <li><a href="/facts/Jogging/XQeTpmTt">Jogging</a><a class="footnote-ref" id="fnref:35" href="#fn:35"><sup>35</sup></a></li></ul> <p>Vigorous activities </p> <ul><li>Brisk walking (about 4.5 miles per hour (7.2 km/h))</li> <li>Bicycling at more than 10 miles per hour (16 km/h)</li> <li>Hiking uphill</li> <li><a href="/facts/Cross-country_skiing/dxBzlgTn">Cross-country skiing</a><a class="footnote-ref" id="fnref:36" href="#fn:36"><sup>36</sup></a></li> <li><a href="/facts/Stair_climbing/d88p6l24">Stair climbing</a><a class="footnote-ref" id="fnref:37" href="#fn:37"><sup>37</sup></a></li> <li><a href="/facts/Soccer/yttjeD0D">Soccer</a></li> <li><a href="/facts/Jogging/XQeTpmTt">Jogging</a></li> <li><a href="/facts/Jumping_rope/kvCkB6oc">Jumping rope</a></li> <li><a href="/facts/Tennis/GwVaWdn0">Tennis</a> (singles)</li> <li><a href="/facts/Basketball/M5pl4Pzo">Basketball</a></li> <li>Heavy yard work<a class="footnote-ref" id="fnref:38" href="#fn:38"><sup>38</sup></a><a class="footnote-ref" id="fnref:39" href="#fn:39"><sup>39</sup></a></li> <li>Elliptical training<a class="footnote-ref" id="fnref:40" href="#fn:40"><sup>40</sup></a></li> <li><a href="/facts/Rowing/qVIXbUwA">Rowing</a><a class="footnote-ref" id="fnref:41" href="#fn:41"><sup>41</sup></a></li></ul> <h3>Versus anaerobic exercise</h3> <p>Aerobic exercise and fitness can be contrasted with <a href="/facts/Anaerobic_exercise/EcD1WW3U">anaerobic exercise</a>, of which <a href="/facts/Strength_training/G5u5cBH0">strength training</a> and <a href="/facts/Short-distance_running/nCAnq1dj">short-distance running</a> 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.<a class="footnote-ref" id="fnref:42" href="#fn:42"><sup>42</sup></a> Common <a href="/facts/Kettlebell/ePxTPQfS">kettlebell</a> exercises combine aerobic and anaerobic aspects. Allowing 24 hours of recovery between aerobic and strength exercise leads to greater fitness.<a class="footnote-ref" id="fnref:43" href="#fn:43"><sup>43</sup></a><a class="footnote-ref" id="fnref:44" href="#fn:44"><sup>44</sup></a> </p><p>New research on the endocrine functions of contracting muscles has shown that both aerobic and anaerobic exercise promote the secretion of <a href="/facts/Myokine/4ytmFxnK">myokines</a>, 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.<a class="footnote-ref" id="fnref:45" href="#fn:45"><sup>45</sup></a> 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. </p><p>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 <a href="/facts/Glycolysis/a5ApxLoG">glycolysis</a> paired with <a href="/facts/Lactic_acid_fermentation/8eQ5uBDq">lactic acid fermentation</a>, and the <a href="/facts/Creatine/xhBTBard">phosphocreatine system</a> to generate energy in the form of <a href="/facts/Adenosine_triphosphate/nB9bwgcU">ATP</a>. </p> <h3>Fuel usage</h3> <p>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 <a href="/facts/Fat/87HcP11s">fat</a> (in the form of <a href="/facts/Adipose_tissue/PxxedB6e">adipose tissue</a>) and <a href="/facts/Glycogen/kWa8fPFE">glycogen</a>. At lower intensity aerobic exercise, the body preferentially uses fat as its main fuel source for <a href="/facts/Cellular_respiration/kb6gpsvL">cellular respiration</a>, however as intensity increases the body preferentially uses <a href="/facts/Glycogen/kWa8fPFE">glycogen</a> stored in the muscles and liver or other carbohydrates, as it is a quicker source of energy.<a class="footnote-ref" id="fnref:46" href="#fn:46"><sup>46</sup></a> Aerobic exercise at low or moderate intensity is not a very efficient way to lose fat in comparison to high intensity aerobic exercise. Lipolysis (hydrolysis of triglyceride into fatty acids),<a class="footnote-ref" id="fnref:47" href="#fn:47"><sup>47</sup></a> not fat burning (conversion of fatty acid to carbon dioxide), explains the intensity-dependent fat mass reduction. It has been shown that fatty acid is consumed for wound healing, where moderate intensity exercise does not produce significant damage like high intensity exercise. The size of adipose tissue is determined by the magnitude of nutrient competition from muscle and lungs for cell regeneration and energy replenishment after exercise.<a class="footnote-ref" id="fnref:48" href="#fn:48"><sup>48</sup></a> </p> <h2 id="health-effects">Health effects</h2> <p>Among the possible health benefits of regular aerobic exercise are:<a class="footnote-ref" id="fnref:49" href="#fn:49"><sup>49</sup></a> </p> <ul><li>May improve mood<a class="footnote-ref" id="fnref:50" href="#fn:50"><sup>50</sup></a><a class="footnote-ref" id="fnref:51" href="#fn:51"><sup>51</sup></a></li> <li>Strengthens and enlarges the <a href="/facts/Heart/fF4KSGdk">heart</a> muscle, to improve its pumping efficiency and reduce the resting heart rate, known as <a href="/facts/Aerobic_conditioning/IguWHEAt">aerobic conditioning</a></li> <li>May improve circulation efficiency and reduce blood pressure</li> <li>May help maintain independence in later life<a class="footnote-ref" id="fnref:52" href="#fn:52"><sup>52</sup></a><a class="footnote-ref" id="fnref:53" href="#fn:53"><sup>53</sup></a></li> <li>Increases the total number of red blood cells in the body, facilitating transport of oxygen<a class="footnote-ref" id="fnref:54" href="#fn:54"><sup>54</sup></a></li> <li>Improves mental health, including reducing stress and lowering the incidence of depression, as well as increased cognitive capacity.<a class="footnote-ref" id="fnref:55" href="#fn:55"><sup>55</sup></a></li> <li>Slightly reduced depression may also be observed, especially if aerobic exercises are used as additional treatment for patients with a hematological malignancy<a class="footnote-ref" id="fnref:56" href="#fn:56"><sup>56</sup></a></li> <li>Reduces the risk for diabetes (One <a href="/facts/Meta-analysis/IcfChd8z">meta-analysis</a> has shown, from multiple conducted studies, that aerobic exercise does help lower <a href="/facts/HbA1c/jTNaU7Jv">Hb A1Clevels</a> for type 2 diabetics.<a class="footnote-ref" id="fnref:57" href="#fn:57"><sup>57</sup></a>)</li> <li>Moderates the risk of death due to cardiovascular problems<a class="footnote-ref" id="fnref:58" href="#fn:58"><sup>58</sup></a></li> <li>Promotes <a href="/facts/Weight_loss/DQE4cXw0">weight loss</a><a class="footnote-ref" id="fnref:59" href="#fn:59"><sup>59</sup></a><a class="footnote-ref" id="fnref:60" href="#fn:60"><sup>60</sup></a></li> <li>Reduces the risk of <a href="/facts/Osteoporosis/xa1W00Tj">osteoporosis</a><a class="footnote-ref" id="fnref:61" href="#fn:61"><sup>61</sup></a></li> <li>May improve <a href="/facts/Episodic_memory/1QIEM9gQ">episodic memory</a><a class="footnote-ref" id="fnref:62" href="#fn:62"><sup>62</sup></a></li></ul> <h2 id="risks-and-disadvantages">Risks and disadvantages</h2> <p>Some drawbacks of aerobic exercise include: </p> <ul><li>Overuse injuries of the <a href="/facts/Musculoskeletal_system/8BNFttqw">musculoskeletal system</a> because of repetitive exercise, with young athletes (under the age of 19) particularly at risk<a class="footnote-ref" id="fnref:63" href="#fn:63"><sup>63</sup></a></li> <li><a href="/facts/Overtraining/J8QGGCgN">Overtraining</a> syndrome may lead to persistent dysfunction of a number of body systems<a class="footnote-ref" id="fnref:64" href="#fn:64"><sup>64</sup></a></li> <li>High volumes of training with insufficient calorie intake puts athletes—particularly female ones—at risk for <a href="/facts/RED-S/QCFqXfQ8">RED-S</a><a class="footnote-ref" id="fnref:65" href="#fn:65"><sup>65</sup></a></li> <li>Aerobic exercise may not be as efficient as other exercise methods. For example, <a href="/facts/High-intensity_interval_training/vNfuDGVB">High-intensity interval training</a> (HIIT) has been shown to provide similar benefits in a fraction of the time spent exercising per week.<a class="footnote-ref" id="fnref:66" href="#fn:66"><sup>66</sup></a></li></ul> <p>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.<a class="footnote-ref" id="fnref:67" href="#fn:67"><sup>67</sup></a> </p> <h2 id="commercialization">Commercialization</h2> <p>Aerobic exercise has long been a popular approach to achieving weight loss and physical fitness, often taking a commercial form. </p> <ul><li>In the 1970s, Judi Sheppard Missett helped create the market for commercial aerobics with her <a href="/facts/Jazzercise/gzvvGDWd">Jazzercise</a> program,<a class="footnote-ref" id="fnref:68" href="#fn:68"><sup>68</sup></a> at the same time as <a href="/facts/Jacki_Sorensen/72d4p796">Jacki Sorensen</a> was expanding her system of aerobic dancing.<a class="footnote-ref" id="fnref:69" href="#fn:69"><sup>69</sup></a></li> <li>In the 1980s, <a href="/facts/Richard_Simmons/8o3dDurT">Richard Simmons</a> hosted an aerobic exercise show on television, and followed <a href="/facts/Jane_Fonda/9knThj1W">Jane Fonda</a>'s lead by releasing a series of exercise videos.<a class="footnote-ref" id="fnref:70" href="#fn:70"><sup>70</sup></a></li> <li>In the 1990s, <a href="/facts/Billy_Blanks/eD41rP96">Billy Blanks</a>'s <a href="/facts/Tae_Bo/8ERKFtAJ">Tae Bo</a> helped popularize cardio-boxing workouts that incorporated martial arts movements.<a class="footnote-ref" id="fnref:71" href="#fn:71"><sup>71</sup></a> <a href="/facts/Reebok/kuxnf0Lt">Reebok</a> shoes popularized <a href="/facts/Step_aerobics/Se8yhLHY">step aerobics</a> with their Reebok Step device and training program.<a class="footnote-ref" id="fnref:72" href="#fn:72"><sup>72</sup></a></li></ul> <h2 id="see-also">See also</h2> <ul><li><a href="/facts/Aerobics/JlVLyrgk">Aerobics</a></li> <li><a href="/facts/Endurance_training/e7tRhK8T">Endurance training</a></li> <li><a href="/facts/Exercise_physiology/xdbprG30">Exercise physiology</a></li> <li><a href="/facts/Neurobiological_effects_of_physical_exercise/kVVntCLn">Neurobiological effects of physical exercise</a></li> <li><a href="/facts/Music_and_aerobic_exercise_performance/nTqryLre">Music and aerobic exercise performance</a></li></ul> <h2 id="further-reading">Further reading</h2> <ul><li>Aberg MA, Pedersen NL, Torén K, Svartengren M, Bäckstrand B, Johnsson T, et al. (December 2009). <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2785721">"Cardiovascular fitness is associated with cognition in young adulthood"</a>. <i>Proceedings of the National Academy of Sciences of the United States of America</i>. 106 (49): 20906–20911. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/2009PNAS..10620906A">2009PNAS..10620906A</a>. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1073%2Fpnas.0905307106">10.1073/pnas.0905307106</a>. <a href="/facts/PMC_(identifier)/dX1zMt71">PMC</a> <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2785721">2785721</a>. <a href="/facts/PMID_(identifier)/JlHAvMHt">PMID</a> <a href="https://pubmed.ncbi.nlm.nih.gov/19948959">19948959</a>.</li> <li>Cooper KD. <i>The New Aerobics</i>. Eldora, Iowa: Prairie Wind.</li> <li>Donatelle RJ (2005). <i>Health: The Basics</i> (7th ed.). San Francisco: Pearson Benjamin Cummings. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-8053-7795-8.</li> <li>Friedman D (2022). <a href="https://www.penguinrandomhouse.com/books/645493/lets-get-physical-by-danielle-friedman/"><i>Let's Get Physical: How Women Discovered Exercise and Reshaped the World</i></a>. New York: G. P. Putnam's Sons. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 9780593188422. <a href="https://web.archive.org/web/20220408230750/https://www.penguinrandomhouse.com/books/645493/lets-get-physical-by-danielle-friedman/">Archived</a> from the original on 8 April 2022.</li> <li>Guiney H, Machado L (February 2013). <a href="https://doi.org/10.3758%2Fs13423-012-0345-4">"Benefits of regular aerobic exercise for executive functioning in healthy populations"</a>. <i>Psychonomic Bulletin & Review</i>. 20 (1): 73–86. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.3758%2Fs13423-012-0345-4">10.3758/s13423-012-0345-4</a>. <a href="/facts/PMID_(identifier)/JlHAvMHt">PMID</a> <a href="https://pubmed.ncbi.nlm.nih.gov/23229442">23229442</a>. <a href="/facts/S2CID_(identifier)/ldJsHa2Y">S2CID</a> <a href="https://api.semanticscholar.org/CorpusID:24190840">24190840</a>.</li> <li>Hinkle JS (1992). <a href="https://web.archive.org/web/20100719225713/http://www.ericdigests.org/1992-3/fitness.htm"><i>School Children and Fitness: Aerobics for Life</i></a>. ERIC Clearinghouse. Archived from <a href="http://www.ericdigests.org/1992-3/fitness.htm">the original</a> on 2010-07-19. Retrieved 2008-02-20.</li> <li>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". <i>Psychology, Health & Medicine</i>. 13 (2): 180–4. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1080%2F13548500701426729">10.1080/13548500701426729</a>. <a href="/facts/PMID_(identifier)/JlHAvMHt">PMID</a> <a href="https://pubmed.ncbi.nlm.nih.gov/18350462">18350462</a>. <a href="/facts/S2CID_(identifier)/ldJsHa2Y">S2CID</a> <a href="https://api.semanticscholar.org/CorpusID:24444650">24444650</a>.</li></ul> <h2 id="external-links">External links</h2> <ul><li> Media related to Aerobic exercise at Wikimedia Commons</li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>"Exercise and Physical Fitness". medlineplus.gov. 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