Machine fly

<p>A machine fly, alternatively called a seated lever fly or "pec deck" fly is a <a href="/facts/Strength_training/G5u5cBH0">strength training</a> exercise based on the free weight <a href="/facts/Fly_(exercise)/pM4Ka6Kx">chest fly</a>. As with the chest fly, the <a href="/facts/Hand/0yhW6deV">hand</a> and <a href="/facts/Arm/u2Q8DA5K">arm</a> move through an <a href="/facts/Range_of_motion/UnYUTh9v">arc</a> while the <a href="/facts/Elbow/2bH9FY0F">elbow</a> is kept at a constant angle. Flyes are used to work the <a href="/facts/Muscle/dmxrL8pH">muscles</a> of the <a href="/facts/Torso/97u5nUje">upper body</a>, primarily the sternal head of the  <a href="/facts/Pectoralis_major/TYGcRM1U">pectoralis major</a>.  Because these exercises use the arms as <a href="/facts/Lever/HYDtMuAq">levers</a> at their longest possible length, the amount of weight that can be moved is significantly less than equivalent press exercises for the same muscles (the <a href="/facts/Military_press/JgFA0Uph">military press</a> and <a href="/facts/Bench_press/EdEravIA">bench press</a> for the shoulder and chest respectively). Denie Walter is credited with calling it the Peck Dec back in the 1970s.
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Machine fly open-in-new

Machine fly