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Yet many runners either don't know their MAS or don't understand how to use it properly.",{"type":21,"tag":30,"props":63,"children":64},{},[65],{"type":27,"value":66},"This guide breaks it all down — what MAS is, how to test it accurately, and the specific workouts that will push it higher.",{"type":21,"tag":68,"props":69,"children":71},"h2",{"id":70},"_1-what-exactly-is-mas",[72],{"type":27,"value":73},"1) What Exactly Is MAS?",{"type":21,"tag":30,"props":75,"children":76},{},[77,82,84,89],{"type":21,"tag":36,"props":78,"children":79},{},[80],{"type":27,"value":81},"Maximal Aerobic Speed",{"type":27,"value":83}," is the running speed at which your oxygen consumption hits its ceiling — your ",{"type":21,"tag":36,"props":85,"children":86},{},[87],{"type":27,"value":88},"VO2max",{"type":27,"value":90},". Beyond this speed, your body can't take in any more oxygen and starts relying heavily on anaerobic energy systems, which produce fatigue rapidly.",{"type":21,"tag":30,"props":92,"children":93},{},[94,96,101],{"type":27,"value":95},"In practical terms, MAS is the pace you can hold for roughly ",{"type":21,"tag":36,"props":97,"children":98},{},[99],{"type":27,"value":100},"4 to 8 minutes",{"type":27,"value":102}," at an all-out effort. It's not a sprint — it's a controlled, intense effort where you're right at the edge of what your aerobic system can deliver.",{"type":21,"tag":104,"props":105,"children":107},"h3",{"id":106},"mas-vs-vo2max-whats-the-difference",[108],{"type":27,"value":109},"MAS vs. VO2max — What's the Difference?",{"type":21,"tag":111,"props":112,"children":113},"ul",{},[114,124],{"type":21,"tag":115,"props":116,"children":117},"li",{},[118,122],{"type":21,"tag":36,"props":119,"children":120},{},[121],{"type":27,"value":88},{"type":27,"value":123}," is a physiological measurement: the maximum volume of oxygen your body can use, expressed in ml\u002Fkg\u002Fmin. It's typically measured in a lab with a gas exchange mask.",{"type":21,"tag":115,"props":125,"children":126},{},[127,131],{"type":21,"tag":36,"props":128,"children":129},{},[130],{"type":27,"value":40},{"type":27,"value":132}," is the speed you run at when you reach that VO2max, expressed in km\u002Fh (or min\u002Fkm pace). It's the field-friendly version of VO2max.",{"type":21,"tag":30,"props":134,"children":135},{},[136,138,143],{"type":27,"value":137},"Here's the key insight: two runners can have the same VO2max but different MAS values. The runner with better ",{"type":21,"tag":36,"props":139,"children":140},{},[141],{"type":27,"value":142},"running economy",{"type":27,"value":144}," — a more efficient stride, less wasted energy — will run faster at the same oxygen consumption. That's why MAS matters more than VO2max for practical training purposes.",{"type":21,"tag":104,"props":146,"children":148},{"id":147},"typical-mas-values",[149],{"type":27,"value":150},"Typical MAS Values",{"type":21,"tag":152,"props":153,"children":154},"table",{},[155,174],{"type":21,"tag":156,"props":157,"children":158},"thead",{},[159],{"type":21,"tag":160,"props":161,"children":162},"tr",{},[163,169],{"type":21,"tag":164,"props":165,"children":166},"th",{},[167],{"type":27,"value":168},"Runner Profile",{"type":21,"tag":164,"props":170,"children":171},{},[172],{"type":27,"value":173},"Typical MAS",{"type":21,"tag":175,"props":176,"children":177},"tbody",{},[178,192,205,218],{"type":21,"tag":160,"props":179,"children":180},{},[181,187],{"type":21,"tag":182,"props":183,"children":184},"td",{},[185],{"type":27,"value":186},"Beginner runner",{"type":21,"tag":182,"props":188,"children":189},{},[190],{"type":27,"value":191},"10–13 km\u002Fh",{"type":21,"tag":160,"props":193,"children":194},{},[195,200],{"type":21,"tag":182,"props":196,"children":197},{},[198],{"type":27,"value":199},"Recreational runner (10K in 50 min)",{"type":21,"tag":182,"props":201,"children":202},{},[203],{"type":27,"value":204},"13–15 km\u002Fh",{"type":21,"tag":160,"props":206,"children":207},{},[208,213],{"type":21,"tag":182,"props":209,"children":210},{},[211],{"type":27,"value":212},"Competitive runner (10K in 40 min)",{"type":21,"tag":182,"props":214,"children":215},{},[216],{"type":27,"value":217},"16–18 km\u002Fh",{"type":21,"tag":160,"props":219,"children":220},{},[221,226],{"type":21,"tag":182,"props":222,"children":223},{},[224],{"type":27,"value":225},"Elite runner",{"type":21,"tag":182,"props":227,"children":228},{},[229],{"type":27,"value":230},"20–24 km\u002Fh",{"type":21,"tag":68,"props":232,"children":234},{"id":233},"_2-why-mas-matters-for-every-runner",[235],{"type":27,"value":236},"2) Why MAS Matters for Every Runner",{"type":21,"tag":30,"props":238,"children":239},{},[240,242,247],{"type":27,"value":241},"MAS is your ",{"type":21,"tag":36,"props":243,"children":244},{},[245],{"type":27,"value":246},"aerobic engine",{"type":27,"value":248},". 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A runner with an MAS of 18 km\u002Fh doing a marathon at 80% is running 14.4 km\u002Fh (4:10\u002Fkm). A runner with an MAS of 14 km\u002Fh at the same 80% effort runs 11.2 km\u002Fh (5:21\u002Fkm).",{"type":21,"tag":30,"props":313,"children":314},{},[315],{"type":27,"value":316},"Improving your MAS raises the ceiling on everything.",{"type":21,"tag":68,"props":318,"children":320},{"id":319},"_3-how-to-test-your-mas",[321],{"type":27,"value":322},"3) How to Test Your MAS",{"type":21,"tag":30,"props":324,"children":325},{},[326,328,333],{"type":27,"value":327},"There are several reliable protocols, ranging from simple to highly controlled. The most important thing is to ",{"type":21,"tag":36,"props":329,"children":330},{},[331],{"type":27,"value":332},"pick one method and stick with it",{"type":27,"value":334}," so you can track progress over time.",{"type":21,"tag":104,"props":336,"children":338},{"id":337},"the-cooper-test-12-minutes",[339],{"type":27,"value":340},"The Cooper Test (12 Minutes)",{"type":21,"tag":30,"props":342,"children":343},{},[344],{"type":27,"value":345},"The most widely known field test:",{"type":21,"tag":111,"props":347,"children":348},{},[349,361],{"type":21,"tag":115,"props":350,"children":351},{},[352,354,359],{"type":27,"value":353},"Run as far as you can in ",{"type":21,"tag":36,"props":355,"children":356},{},[357],{"type":27,"value":358},"12 minutes",{"type":27,"value":360}," on flat terrain (a track is ideal).",{"type":21,"tag":115,"props":362,"children":363},{},[364],{"type":21,"tag":36,"props":365,"children":366},{},[367],{"type":27,"value":368},"MAS ≈ distance (in metres) \u002F 200",{"type":21,"tag":370,"props":371,"children":372},"blockquote",{},[373],{"type":21,"tag":30,"props":374,"children":375},{},[376],{"type":21,"tag":377,"props":378,"children":379},"em",{},[380],{"type":27,"value":381},"Example: 3,000 m in 12 min = MAS of approximately 15 km\u002Fh",{"type":21,"tag":30,"props":383,"children":384},{},[385,390,392,397],{"type":21,"tag":36,"props":386,"children":387},{},[388],{"type":27,"value":389},"Pros",{"type":27,"value":391},": Simple, no equipment needed.\n",{"type":21,"tag":36,"props":393,"children":394},{},[395],{"type":27,"value":396},"Cons",{"type":27,"value":398},": Pacing is critical — starting too fast will give you a lower result. 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Beginners can start with gentle 30\u002F30 sessions — even at 10–12 km\u002Fh, interval work delivers real benefits.",{"type":21,"tag":104,"props":1663,"children":1665},{"id":1664},"does-mas-decline-with-age",[1666],{"type":27,"value":1667},"Does MAS decline with age?",{"type":21,"tag":30,"props":1669,"children":1670},{},[1671,1673,1678,1680,1686],{"type":27,"value":1672},"Yes, VO2max drops by roughly 5–10% per decade after age 30–35. But regular interval training ",{"type":21,"tag":36,"props":1674,"children":1675},{},[1676],{"type":27,"value":1677},"significantly slows",{"type":27,"value":1679}," this decline. Runners in their 50s and 60s who train consistently often maintain a higher MAS than sedentary people in their 30s. For more on this, read our guide to ",{"type":21,"tag":299,"props":1681,"children":1683},{"href":1682},"\u002Fen\u002Farticles\u002F2026-04-11-running-after-50-adapt-training.en",[1684],{"type":27,"value":1685},"running after 50",{"type":27,"value":423},{"type":21,"tag":104,"props":1688,"children":1690},{"id":1689},"can-i-do-mas-intervals-on-a-treadmill",[1691],{"type":27,"value":1692},"Can I do MAS intervals on a treadmill?",{"type":21,"tag":30,"props":1694,"children":1695},{},[1696,1698,1703],{"type":27,"value":1697},"Absolutely. The advantage is that the pace is set for you — no guesswork. The downside: the belt moves under your feet, so there's less propulsion demand. Set ",{"type":21,"tag":36,"props":1699,"children":1700},{},[1701],{"type":27,"value":1702},"1% incline",{"type":27,"value":1704}," to simulate outdoor air resistance. And watch your hydration — treadmill running generates more heat.",{"type":21,"tag":104,"props":1706,"children":1708},{"id":1707},"whats-the-difference-between-mas-and-threshold-pace",[1709],{"type":27,"value":1710},"What's the difference between MAS and threshold pace?",{"type":21,"tag":30,"props":1712,"children":1713},{},[1714,1716,1721],{"type":27,"value":1715},"Threshold pace (lactate threshold \u002F VT2) sits at roughly ",{"type":21,"tag":36,"props":1717,"children":1718},{},[1719],{"type":27,"value":1720},"80–88% of MAS",{"type":27,"value":1722},". It's the pace you can hold for 40–60 minutes. MAS is above that — sustainable for 4–8 minutes maximum. Both should be trained as complementary elements.",{"type":21,"tag":68,"props":1724,"children":1726},{"id":1725},"conclusion",[1727],{"type":27,"value":1728},"Conclusion",{"type":21,"tag":30,"props":1730,"children":1731},{},[1732,1734,1739],{"type":27,"value":1733},"MAS is the most practical performance benchmark in distance running. Knowing yours lets you set precise training paces across every session. Improving it — through well-dosed interval work built on a solid foundation of ",{"type":21,"tag":299,"props":1735,"children":1736},{"href":301},[1737],{"type":27,"value":1738},"easy running",{"type":27,"value":1740}," — is the most direct path to getting faster at every distance.",{"type":21,"tag":30,"props":1742,"children":1743},{},[1744,1746,1751,1753,1758,1760,1765],{"type":27,"value":1745},"Three principles to remember: ",{"type":21,"tag":36,"props":1747,"children":1748},{},[1749],{"type":27,"value":1750},"test it regularly",{"type":27,"value":1752},", ",{"type":21,"tag":36,"props":1754,"children":1755},{},[1756],{"type":27,"value":1757},"train it with structure",{"type":27,"value":1759}," (no more than 2 hard sessions per week), and ",{"type":21,"tag":36,"props":1761,"children":1762},{},[1763],{"type":27,"value":1764},"never neglect the aerobic base",{"type":27,"value":1766}," that supports it.",{"type":21,"tag":1768,"props":1769,"children":1770},"hr",{},[],{"type":21,"tag":68,"props":1772,"children":1774},{"id":1773},"further-reading",[1775],{"type":27,"value":1776},"Further Reading",{"type":21,"tag":111,"props":1778,"children":1779},{},[1780,1788,1796,1804],{"type":21,"tag":115,"props":1781,"children":1782},{},[1783],{"type":21,"tag":299,"props":1784,"children":1785},{"href":301},[1786],{"type":27,"value":1787},"Fundamental Endurance: The Complete Guide",{"type":21,"tag":115,"props":1789,"children":1790},{},[1791],{"type":21,"tag":299,"props":1792,"children":1793},{"href":1603},[1794],{"type":27,"value":1795},"Understanding Mitochondria: Your Running Powerhouses",{"type":21,"tag":115,"props":1797,"children":1798},{},[1799],{"type":21,"tag":299,"props":1800,"children":1801},{"href":1044},[1802],{"type":27,"value":1803},"Strength Training Basics for Runners",{"type":21,"tag":115,"props":1805,"children":1806},{},[1807],{"type":21,"tag":299,"props":1808,"children":1809},{"href":1682},[1810],{"type":27,"value":1811},"Running After 50: How to Adapt Your Training",[1813,1817,1821,1825,1829,1833,1837,1841,1845,1849],{"lang":1814,"slug":1815,"url":1816},"fr","2026-05-07-vma-course-a-pied","https:\u002F\u002Frunrun.fr\u002Farticles\u002F2026-05-07-vma-course-a-pied",{"lang":1818,"slug":1819,"url":1820},"no","2026-05-07-vma-maksimal-aerob-hastighet","https:\u002F\u002Frunrun.fr\u002Fno\u002Farticles\u002F2026-05-07-vma-maksimal-aerob-hastighet",{"lang":1822,"slug":1823,"url":1824},"pl","2026-05-07-vma-maksymalna-predkosc-tlenowa","https:\u002F\u002Frunrun.fr\u002Fpl\u002Farticles\u002F2026-05-07-vma-maksymalna-predkosc-tlenowa",{"lang":1826,"slug":1827,"url":1828},"sv","2026-05-07-vma-maximal-aerob-hastighet","https:\u002F\u002Frunrun.fr\u002Fsv\u002Farticles\u002F2026-05-07-vma-maximal-aerob-hastighet",{"lang":1830,"slug":1831,"url":1832},"de","2026-05-07-vma-maximale-aerobe-geschwindigkeit","https:\u002F\u002Frunrun.fr\u002Fde\u002Farticles\u002F2026-05-07-vma-maximale-aerobe-geschwindigkeit",{"lang":1834,"slug":1835,"url":1836},"es","2026-05-07-vma-velocidad-maxima-aerobica","https:\u002F\u002Frunrun.fr\u002Fes\u002Farticles\u002F2026-05-07-vma-velocidad-maxima-aerobica",{"lang":1838,"slug":1839,"url":1840},"pt","2026-05-07-vma-velocidade-maxima-aerobica","https:\u002F\u002Frunrun.fr\u002Fpt\u002Farticles\u002F2026-05-07-vma-velocidade-maxima-aerobica",{"lang":1842,"slug":1843,"url":1844},"it","2026-05-07-vma-velocita-massima-aerobica","https:\u002F\u002Frunrun.fr\u002Fit\u002Farticles\u002F2026-05-07-vma-velocita-massima-aerobica",{"lang":1846,"slug":1847,"url":1848},"ro","2026-05-07-vma-viteza-maxima-aeroba","https:\u002F\u002Frunrun.fr\u002Fro\u002Farticles\u002F2026-05-07-vma-viteza-maxima-aeroba",{"lang":15,"slug":1850,"url":1851},"2026-05-07-vo2max-pace-running-guide","https:\u002F\u002Frunrun.fr\u002Fen\u002Farticles\u002F2026-05-07-vo2max-pace-running-guide"]