> ## Documentation Index
> Fetch the complete documentation index at: https://movement.mantavyam.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Leg extension

> Beginner · Dynamic · Bilateral. Strength

<video controls playsInline preload="none" poster="/images/exercises/e1bz.jpg" src="https://firebasestorage.googleapis.com/v0/b/calistree.appspot.com/o/exerciseVideos%2Fe1bz%2Fe1bz-264.mp4?alt=media&token=a6900512-5ba2-47a6-bb66-f6332406e5b8" className="w-full aspect-square rounded-xl" />

Also known as: Machine leg extension, Seated leg extension, Leg extension machine, Quad extension.

| | |
| - | - |
| **Difficulty** | Beginner |
| **Velocity** | Dynamic |
| **Symmetry** | Bilateral |
| **Athlete** | Lau |
| **Video length** | 13 s |

<Info>
  **Logging:** Total weight used.
</Info>

## Muscles

<div className="rounded-2xl border border-gray-200 dark:border-gray-800 px-5 pt-4 pb-1 my-6">
  <div className="flex items-center gap-2 font-semibold" style={{color: "#c8102e"}}><Icon icon="dumbbell" color="#c8102e" size={18} /> Strength</div>

  <div className="max-w-md mx-auto my-4">
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      <img src="https://mintcdn.com/openmovement/6MqOY9401y9_GkuQ/images/muscle-map/body.svg?fit=max&auto=format&n=6MqOY9401y9_GkuQ&q=85&s=f51e7c4f06c31ba86e1b6bbd192d6d4d" alt="" noZoom className="block w-full m-0" width="1538" height="1340" data-path="images/muscle-map/body.svg" />

      <svg viewBox="0 0 406.99026 354.43411" className="absolute inset-0 w-full h-full" role="img" aria-label="Strength muscle map">
        <g fill="#c8102e" stroke="#7f1d1d" strokeWidth="0.15">
          <path d="M294.13,220.98 294.42,216.32 294.64,208.14 294.80,204.58 295.15,199.80 295.67,194.74 294.62,195.43 293.24,196.52 292.40,197.34 291.64,198.23 290.97,199.18 290.41,200.21 290.10,201.02 289.97,201.77 290.12,204.94 290.12,208.73 291.52,217.31 292.49,220.21 293.82,223.36 293.78,223.65 293.83,223.74ZM336.39,223.36 337.91,219.68 338.68,217.31 340.09,208.73 340.08,204.94 340.23,201.77 340.11,201.02 339.79,200.21 339.24,199.18 338.57,198.23 337.81,197.34 336.97,196.52 335.59,195.43 334.54,194.74 334.95,198.60 335.33,203.38 335.56,208.14 335.84,217.48 336.08,220.98 336.38,223.74 336.42,223.65ZM84.39,240.62 84.17,242.38 83.78,244.13 84.65,243.23 85.70,242.46 86.88,241.92 88.05,241.64 89.25,241.59 90.45,241.75 91.59,242.12 92.95,242.80 92.63,241.80 92.47,241.29 92.39,241.04 92.32,240.79 92.35,240.88 92.59,241.09 93.07,241.33 93.60,241.43 94.00,241.41 94.49,241.27 94.91,241.03 95.28,240.71 95.66,240.23 96.46,238.74 97.33,236.51 98.00,234.22 98.56,231.71 99.07,228.66 99.44,225.59 99.75,222.01 99.94,218.17 98.29,213.98 97.15,211.53 95.90,209.13 94.72,207.07 93.17,204.55 87.43,195.94 84.78,191.64 83.75,189.81 81.85,186.07 80.03,181.98 79.96,183.98 80.25,190.72 80.16,191.55 79.76,193.17 79.77,193.74 79.98,194.97 79.86,195.24 79.61,195.37 79.34,195.30 79.13,195.10 78.81,194.20 78.64,193.93 77.73,193.19 77.42,192.82 77.16,192.35 76.55,190.88 75.56,189.51 75.27,188.95 75.15,188.53 75.15,188.13 75.42,187.05 75.47,186.61 75.25,185.48 75.27,183.79 75.06,183.17 74.49,182.39 71.84,191.63 71.21,194.37 70.75,197.14 70.57,199.00 70.52,201.80 70.72,204.58 71.11,207.35 71.68,210.11 72.38,212.83 74.12,218.47 76.18,224.29 79.54,232.93 80.79,235.80 81.71,237.41 82.44,238.40 83.82,239.76 84.13,240.17 84.41,240.24 84.42,240.17ZM120.65,244.13 120.20,241.94 120.09,241.06 120.05,240.62 120.02,240.17 120.02,240.24 120.30,240.17 120.61,239.76 121.58,238.85 122.37,237.91 123.05,236.89 124.17,234.66 126.03,230.06 128.79,222.84 130.32,218.47 131.26,215.53 132.06,212.83 132.75,210.11 133.32,207.35 133.54,205.97 133.84,203.19 133.92,200.40 133.79,198.07 133.55,196.22 133.22,194.37 132.59,191.63 129.95,182.39 129.37,183.17 129.17,183.79 129.18,185.48 128.96,186.61 129.02,187.05 129.29,188.13 129.28,188.53 129.17,188.95 128.87,189.51 127.88,190.88 127.27,192.35 127.02,192.82 126.70,193.19 125.80,193.93 125.63,194.20 125.30,195.10 125.09,195.30 124.83,195.37 124.57,195.24 124.45,194.97 124.66,193.74 124.68,193.17 124.27,191.55 124.18,190.72 124.48,183.98 124.40,181.98 122.58,186.07 120.68,189.81 119.66,191.64 117.01,195.94 111.27,204.55 109.71,207.07 108.53,209.13 107.29,211.53 106.15,213.98 104.49,218.17 104.69,222.01 104.99,225.59 105.36,228.66 105.87,231.71 106.43,234.22 107.11,236.51 107.74,238.19 108.64,240.03 108.99,240.52 109.43,240.95 109.83,241.22 110.30,241.39 110.84,241.43 111.36,241.33 111.84,241.09 112.09,240.88 112.12,240.79 112.04,241.04 111.96,241.29 111.80,241.80 111.49,242.80 112.35,242.34 113.60,241.85 114.78,241.62 115.98,241.60 117.17,241.80 118.45,242.30 119.54,243.02Z" fillOpacity="0.9" />

          <path d="M134.88,161.73 136.11,157.99 136.32,156.89 136.34,156.06 136.15,154.93 135.19,152.15 134.76,150.44 134.63,150.96 134.37,151.51 134.07,151.93 133.60,152.41ZM69.47,151.33 68.29,154.93 68.12,155.77 68.09,156.34 68.15,157.17 68.40,158.26 69.55,161.73 70.78,152.78 69.99,152.05ZM125.45,160.72 122.11,168.19 114.22,185.35 109.47,195.47 108.38,197.94 107.38,200.45 106.52,203.00 106.15,204.29 105.70,206.19 105.38,207.95 105.06,210.31 104.82,212.69 104.49,218.17 106.15,213.98 107.29,211.53 108.53,209.13 109.71,207.07 111.27,204.55 117.01,195.94 119.66,191.64 121.65,187.95 122.58,186.07 124.29,182.25 125.08,180.30 126.50,176.36 127.73,172.35 128.60,169.03 129.18,166.43 129.90,162.50 130.45,158.54 130.74,155.55 129.95,157.10 129.33,157.96 128.82,158.50 127.95,159.22 127.00,159.85ZM74.15,159.86 74.75,163.81 75.25,166.43 75.84,169.03 76.70,172.35 77.93,176.36 78.62,178.34 80.14,182.25 80.97,184.17 82.78,187.95 83.75,189.81 85.85,193.44 88.24,197.18 93.17,204.55 95.47,208.34 96.75,210.72 97.92,213.16 98.99,215.64 99.94,218.17 99.75,214.51 99.44,210.90 99.15,208.54 98.73,206.19 98.28,204.29 97.50,201.72 96.57,199.19 95.52,196.70 83.32,170.38 79.13,161.08 76.94,159.85 75.70,158.99 74.61,157.96 74.16,157.36 73.80,156.75Z" fillOpacity="0.4" />
        </g>
      </svg>
    </div>
  </div>

  <Columns cols={2}>
    <Card title="Primary"><ul className="not-prose list-none p-0 mt-2 mb-0 space-y-1.5"><li className="flex items-center gap-2"><span className="inline-block w-2 h-2 rounded-full shrink-0" style={{background: "#cc2742"}} />Quadriceps</li></ul></Card>
    <Card title="Secondary"><ul className="not-prose list-none p-0 mt-2 mb-0 space-y-1.5"><li className="flex items-center gap-2"><span className="inline-block w-2 h-2 rounded-full shrink-0" style={{background: "#e299a6"}} />Pelvis</li></ul></Card>
  </Columns>
</div>

<Accordion title="Individual muscles" icon="list">
  * Rectus femoris
  * Vastus medialis
  * Vastus intermedius
  * Vastus lateralis
</Accordion>

## Equipment

<div className="not-prose" style={{display: "grid", gridTemplateColumns: "repeat(auto-fill, minmax(10rem, 1fr))", gap: "0.75rem"}}><a href="/collections/equipment/leg-extension-machine" className="flex flex-col rounded-xl border border-gray-200 dark:border-gray-800 overflow-hidden no-underline text-gray-900 dark:text-gray-100 hover:border-gray-400 dark:hover:border-gray-600"><div className="bg-white flex items-center justify-center p-3" style={{height: "8.5rem"}}><img src="https://mintcdn.com/openmovement/vLNdve7XPAGUwV8u/images/equipment/q052.webp?fit=max&auto=format&n=vLNdve7XPAGUwV8u&q=85&s=9143bc5f22a73ba09aa117171d1f48b4" alt="Leg extension machine" noZoom className="m-0 w-full h-full object-contain" width="349" height="303" data-path="images/equipment/q052.webp" /></div><span className="px-3 py-2.5 text-sm font-medium leading-snug border-t border-gray-200 dark:border-gray-800">Leg extension machine</span></a></div>

## Appears in

<div className="not-prose rounded-2xl border border-gray-200 dark:border-gray-800 px-5 py-4 flex flex-col gap-4"><div style={{display: "flex", flexWrap: "wrap", gap: "0.5rem 1rem", alignItems: "baseline"}}><div className="flex items-center gap-2 font-medium text-gray-900 dark:text-gray-100" style={{flex: "0 0 10rem"}}><Icon icon="dumbbell" size={16} /> Strength</div><div style={{flex: "1 1 18rem", display: "flex", flexWrap: "wrap", gap: "0.5rem"}}><a href="/collections/strength/pelvis" className="inline-flex items-center gap-1.5 rounded-full border border-gray-200 dark:border-gray-700 px-3 py-1 text-sm text-gray-700 dark:text-gray-300 no-underline hover:border-gray-400 dark:hover:border-gray-500">Pelvis</a><a href="/collections/strength/quadriceps" className="inline-flex items-center gap-1.5 rounded-full border border-gray-200 dark:border-gray-700 px-3 py-1 text-sm text-gray-700 dark:text-gray-300 no-underline hover:border-gray-400 dark:hover:border-gray-500">Quadriceps</a></div></div><div style={{display: "flex", flexWrap: "wrap", gap: "0.5rem 1rem", alignItems: "baseline"}}><div className="flex items-center gap-2 font-medium text-gray-900 dark:text-gray-100" style={{flex: "0 0 10rem"}}><Icon icon="person" size={16} /> Joint movements</div><div style={{flex: "1 1 18rem", display: "flex", flexDirection: "column", gap: "0.5rem"}}><div className="flex flex-wrap items-center gap-2"><span className="text-sm text-gray-500 dark:text-gray-400 w-20">Knee</span><a href="/collections/joint-movements/knee-extension" className="inline-flex items-center gap-1.5 rounded-full border border-gray-200 dark:border-gray-700 px-3 py-1 text-sm text-gray-700 dark:text-gray-300 no-underline hover:border-gray-400 dark:hover:border-gray-500"><span className="inline-block w-2 h-2 rounded-full" style={{background: "#c8102e"}} />extension</a></div><div className="flex gap-4 text-xs text-gray-500 dark:text-gray-400"><span className="inline-flex items-center gap-1.5"><span className="inline-block w-2 h-2 rounded-full" style={{background: "#c8102e"}} /> trains</span><span className="inline-flex items-center gap-1.5"><span className="inline-block w-2 h-2 rounded-full" style={{background: "#1e88e5"}} /> stretches</span></div></div></div></div>

## Progressions

<Columns cols={3}>
  <Card title="Single-leg leg extension" img="https://mintcdn.com/openmovement/C5MvCdZlQGzP5T4h/images/exercises/e1c0.jpg?fit=max&auto=format&n=C5MvCdZlQGzP5T4h&q=85&s=75e2a42b4645434b3235502208f43eea" href="/exercises/single-leg-leg-extension-e1c0" width="320" height="320" data-path="images/exercises/e1c0.jpg">Beginner</Card>
</Columns>

## Variations

<Columns cols={3}>
  <Card title="Single-leg leg extension" img="https://mintcdn.com/openmovement/C5MvCdZlQGzP5T4h/images/exercises/e1c0.jpg?fit=max&auto=format&n=C5MvCdZlQGzP5T4h&q=85&s=75e2a42b4645434b3235502208f43eea" href="/exercises/single-leg-leg-extension-e1c0" width="320" height="320" data-path="images/exercises/e1c0.jpg">Beginner</Card>
</Columns>

<Accordion title="View Similar Exercises" icon="shuffle">
  <Columns cols={3}>
    <Card title="Egg beater" img="https://mintcdn.com/openmovement/qn9pA-8XF4O_0Hwh/images/exercises/e039.jpg?fit=max&auto=format&n=qn9pA-8XF4O_0Hwh&q=85&s=4c6ca4a5b70b4980b871c331eaba47fb" href="/exercises/egg-beater-e039" width="320" height="320" data-path="images/exercises/e039.jpg">Beginner</Card>
    <Card title="Back squat" img="https://mintcdn.com/openmovement/NshFvDFu3JkKMedy/images/exercises/e0h0.jpg?fit=max&auto=format&n=NshFvDFu3JkKMedy&q=85&s=9d57c03f0fcbdbd8d7e04a8bc53ce412" href="/exercises/back-squat-e0h0" width="320" height="320" data-path="images/exercises/e0h0.jpg">Beginner - Elite</Card>
    <Card title="Barbell front squat" img="https://mintcdn.com/openmovement/NshFvDFu3JkKMedy/images/exercises/e0h1.jpg?fit=max&auto=format&n=NshFvDFu3JkKMedy&q=85&s=ba0cb96e728ef21c3a658c27cd9dad6b" href="/exercises/barbell-front-squat-e0h1" width="320" height="320" data-path="images/exercises/e0h1.jpg">Novice</Card>
    <Card title="Double kettlebell front squat" img="https://mintcdn.com/openmovement/Y5MT2oNbCDhFQGmS/images/exercises/e13j.jpg?fit=max&auto=format&n=Y5MT2oNbCDhFQGmS&q=85&s=f816c42f62ec267e4db337da5c0c826d" href="/exercises/double-kettlebell-front-squat-e13j" width="320" height="320" data-path="images/exercises/e13j.jpg">Novice</Card>
    <Card title="Goblet cyclist squat" img="https://mintcdn.com/openmovement/Y5MT2oNbCDhFQGmS/images/exercises/e11o.jpg?fit=max&auto=format&n=Y5MT2oNbCDhFQGmS&q=85&s=f6cebd194e67b2e0585e89c42dd7be3b" href="/exercises/goblet-cyclist-squat-e11o" width="320" height="320" data-path="images/exercises/e11o.jpg">Novice</Card>
  </Columns>
</Accordion>

<Note>
  Want to log this exercise? Open it in [Calistree](https://calistree.app/datasheet/leg-extension-e1bz). Text and images are used under [CC BY-NC-ND 4.0](https://creativecommons.org/licenses/by-nc-nd/4.0/); the video plays from the original source.
</Note>


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