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<span id="openzim-page-title" class="mw-page-title-main"><span class="mw-page-title-main">Machine fly</span></span>
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<p>A <b>machine fly</b>, alternatively called a <b>seated lever fly</b> or <b>"pec deck" fly</b> is a <a href="Strength_training" title="Strength training">strength training</a> exercise based on the free weight <a href="Fly_(exercise)" title="Fly (exercise)">chest fly</a>. As with the chest fly, the <a href="Hand" title="Hand">hand</a> and <a href="Arm" title="Arm">arm</a> move through an <a href="Range_of_motion" title="Range of motion">arc</a> while the <a href="Elbow" title="Elbow">elbow</a> is kept at a constant angle. Flyes are used to work the <a href="Muscle" title="Muscle">muscles</a> of the <a href="Torso" title="Torso">upper body</a>, primarily the sternal head of the <a href="Pectoralis_major" title="Pectoralis major">pectoralis major</a>. Because these exercises use the arms as <a href="Lever" title="Lever">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="Military_press" class="mw-redirect" title="Military press">military press</a> and <a href="Bench_press" title="Bench press">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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<div class="mw-heading mw-heading2"><h2 id="Equipment">Equipment</h2></div>
<p>There are two designs of weight training machines available for this exercise. The seated lever fly machine, and the Pec Dec. The seated lever fly involves grasping two handles at shoulder height, and pushing them together while keeping the elbows at a constant angle.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> When using the Pec Dec machine the hands grip two handles at head height, while the forearms push against two pads at chest height.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> The anterior <a href="Deltoids" class="mw-redirect" title="Deltoids">deltoids</a> are used as <a href="Anatomical_terms_of_muscle#Synergist" title="Anatomical terms of muscle">synergists</a> in both variations. The <a href="Biceps_brachii" class="mw-redirect" title="Biceps brachii">biceps brachii</a> act as a synergist in the seated lever exercise, but not on the Pec Dec due to the raised arm position.
</p><p>In some machines, the seated lever can be adjusted to perform a <a href="Rear_delt_raise" title="Rear delt raise">rear delt fly</a> exercise.
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<div class="gallerytext">Butterfly machine fly (pec deck) start</div>
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<div class="gallerytext">Butterfly machine fly (pec deck) end</div>
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<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>
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<li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.exrx.net/WeightExercises/PectoralSternal/LVSeatedFly.html">Lever Seated Fly</a> at exrx.com</span>
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<li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.exrx.net/WeightExercises/PectoralSternal/LVPecDeckFly.html">Pec Dec fly</a> at exrx.com</span>
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<div class="side-box-text plainlist">Look up <i><b><a href="https://en.wiktionary.org/wiki/flye" class="extiw external" title="wiktionary:flye">flye</a></b></i> in Wiktionary, the free dictionary.</div></div>
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</style><div id="Strength_training_exercises841" style="font-size:114%;margin:0 4em"><a href="Strength_training" title="Strength training">Strength training</a> exercises</div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Pectoralis_major" title="Pectoralis major">Pectorals</a> (chest)</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Bench_press" title="Bench press">Bench press</a> (c)</li>
<li><a href="Chest_fly" class="mw-redirect" title="Chest fly">Chest fly</a> (i)</li>
<li><a href="Dip_(exercise)" title="Dip (exercise)">Dip</a> (c)</li>
<li> (i)</li>
<li><a href="Push-up" title="Push-up">Push-up</a> (c)</li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Latissimus_dorsi_muscle" title="Latissimus dorsi muscle">Lats</a> and <a href="Trapezius" title="Trapezius">trapezius</a> (upper back)</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Bent-over_row" title="Bent-over row">Bent-over row</a> (c)</li>
<li><a href="Chin-up" class="mw-redirect" title="Chin-up">Chin-up</a> (c)</li>
<li><a href="Muscle-up" title="Muscle-up">Muscle-up</a> (c)</li>
<li><a href="Pull-down_(exercise)" title="Pull-down (exercise)">Pull-down</a> (c)</li>
<li><a href="Pull-up" title="Pull-up">Pull-up</a> (c)</li>
<li><a href="Seated_row" class="mw-redirect" title="Seated row">Seated row</a> (c)</li>
<li><a href="Shoulder_shrug" title="Shoulder shrug">Shoulder shrug</a> (i)</li>
<li><a href="Supine_row" class="mw-redirect" title="Supine row">Supine row</a> (c)</li>
<li><a href="Face_pull_(exercise)" title="Face pull (exercise)">Face pull</a> (c)</li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Deltoid_muscle" title="Deltoid muscle">Deltoids</a> (shoulders)</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Bridge_(exercise)" title="Bridge (exercise)">Bridge</a> (c)</li>
<li><a href="Face_pull_(exercise)" title="Face pull (exercise)">Face pull</a> (c)</li>
<li><a href="Front_raise" title="Front raise">Front raise</a> (i)</li>
<li><a href="Headstand" title="Headstand">Headstand</a> into <a href="Handstand_push-up" title="Handstand push-up">handstand push-up</a> (c)</li>
<li><a href="Lateral_raise" class="mw-redirect" title="Lateral raise">Lateral raise</a> (i)</li>
<li><a href="Rear_delt_raise" title="Rear delt raise">Rear delt raise</a> (i)</li>
<li><a href="Overhead_press" title="Overhead press">Shoulder press</a> (c)</li>
<li><a href="Upright_row" title="Upright row">Upright row</a> (c)</li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Biceps" title="Biceps">Biceps</a> (front of arms)</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Bicep_curl" title="Bicep curl">Bicep curl</a> (i)</li>
<li><a href="Chin-up" class="mw-redirect" title="Chin-up">Chin-up</a> (c)</li>
<li><a href="Push-up#Variations" title="Push-up">Reverse grip push-up</a> (c)</li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Triceps" title="Triceps">Triceps</a> (back of arms)</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Bench_press#Variations" title="Bench press">Close-grip bench press</a> (c)</li>
<li><a href="Push-up#Variations" title="Push-up">Close grip push-up</a> (c)</li>
<li><a href="Dip_(exercise)" title="Dip (exercise)">Dip</a> (c)</li>
<li><a href="Push-down_(exercise)" title="Push-down (exercise)">Push-down</a> (i)</li>
<li><a href="Lying_triceps_extensions" class="mw-redirect" title="Lying triceps extensions">Triceps extension</a> (i)</li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Forearm" title="Forearm">Forearms</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Wrist_curl" title="Wrist curl">Wrist curl</a> (i)</li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Abdominal_exercise" title="Abdominal exercise">Abdomen and obliques</a> (abdomen)</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Crunch_(exercise)" title="Crunch (exercise)">Crunch</a> (i)</li>
<li><a href="Leg_raise" title="Leg raise">Leg raise</a> (c)</li>
<li><a href="Russian_twist" title="Russian twist">Russian twist</a> (c)</li>
<li><a href="Sit-up" title="Sit-up">Sit-up</a> (c)</li>
<li><a href="Squat_(exercise)" title="Squat (exercise)">Squat</a> (c)</li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Erector_spinae_muscles" title="Erector spinae muscles">Lower back</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Bridge_(exercise)" title="Bridge (exercise)">Bridge</a> (c)</li>
<li><a href="Deadlift" title="Deadlift">Deadlift</a> (c)</li>
<li><a href="Good-morning" class="mw-redirect" title="Good-morning">Good-morning</a> (c)</li>
<li><a href="Hyperextension_(exercise)" title="Hyperextension (exercise)">Hyperextension</a> (c)</li>
<li><a href="Pelvic_lift" title="Pelvic lift">Pelvic lift</a> (c)</li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Hip" title="Hip">Hips</a> and <a href="Buttocks" title="Buttocks">buttocks</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Bridge_(exercise)" title="Bridge (exercise)">Bridge</a> (c)</li>
<li><a href="Deadlift" title="Deadlift">Deadlift</a> (c)</li>
<li><a href="Dirty_dog_exercise" title="Dirty dog exercise">Dirty dog exercise</a> (c)</li>
<li><a href="Leg_press" title="Leg press">Leg press</a> (c)</li>
<li><a href="Lunge_(exercise)" title="Lunge (exercise)">Lunge</a> (c)</li>
<li><a href="Squat_(exercise)" title="Squat (exercise)">Squat</a> (c)</li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Quadriceps" title="Quadriceps">Quadriceps</a> (front of thighs)</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Bridge_(exercise)" title="Bridge (exercise)">Bridge</a> (c)</li>
<li><a href="Deadlift" title="Deadlift">Deadlift</a> (c)</li>
<li><a href="Leg_extension" title="Leg extension">Leg extension</a> (i)</li>
<li><a href="Leg_press" title="Leg press">Leg press</a> (c)</li>
<li><a href="Lunge_(exercise)" title="Lunge (exercise)">Lunge</a> (c)</li>
<li><a href="Squat_(exercise)" title="Squat (exercise)">Squat</a> (c)</li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Hamstring" title="Hamstring">Hamstrings</a> (back of thighs)</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Bridge_(exercise)" title="Bridge (exercise)">Bridge</a> (c)</li>
<li><a href="Deadlift" title="Deadlift">Deadlift</a> (c)</li>
<li><a href="Good-morning" class="mw-redirect" title="Good-morning">Good-morning</a> (c)</li>
<li><a href="Leg_curl" title="Leg curl">Leg curl</a> (i)</li>
<li><a href="Leg_press" title="Leg press">Leg press</a> (c)</li>
<li><a href="Lunge_(exercise)" title="Lunge (exercise)">Lunge</a> (c)</li>
<li><a href="Squat_(exercise)" title="Squat (exercise)">Squat</a> (c)</li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Adductor_muscles_of_the_hip" title="Adductor muscles of the hip">Adductors</a> (inside of thighs)</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Leg_raise#Side-lying" title="Leg raise">Side-lying leg raise</a> (i)</li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Triceps_surae_muscle" title="Triceps surae muscle">Calves</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">
<ul><li><a href="Calf_raises" title="Calf raises">Calf raise</a> (i)</li></ul>
</div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div>
<dl><dt>See also</dt>
<dd><a href="Bodybuilding" title="Bodybuilding">Bodybuilding</a></dd>
<dd><a href="Bodyweight_exercise" class="mw-redirect" title="Bodyweight exercise">Bodyweight exercise</a></dd>
<dd><a href="Calisthenics" title="Calisthenics">Calisthenics</a></dd>
<dd><a href="Muscle_hypertrophy" title="Muscle hypertrophy">Muscle hypertrophy</a></dd>
<dd><a href="Olympic_weightlifting" title="Olympic weightlifting">Weightlifting</a></dd>
<dd><a href="Plyometrics" title="Plyometrics">Plyometrics</a></dd>
<dd><a href="Weight_training" class="mw-redirect" title="Weight training">Weight training</a> (<a href="List_of_weight_training_exercises" title="List of weight training exercises">List of exercises</a>)</dd>
<dd><a href="Flywheel_training" title="Flywheel training">Flywheel training</a></dd>
<dd><a href="Gym" title="Gym">Gym</a></dd></dl>
<dl><dt>Legend</dt>
<dd>(c) – compound exercise, (i) – isolated exercise</dd></dl>
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