Dr. Mike Reacts to a 1,500-Pound Leg Press: What Lifters Should Learn
UPLIFT IRON CLUBThe 1,500-Pound Leg Press That Turned Training Into a Spectacle
The most striking thing about El Campeon's viral leg press is not simply the number of plates. It is the whole production: a crowded sled, multiple belts, elaborate preparation and a movement that, in the clips being discussed, covers only a small part of the machine's travel. Exercise scientist Mike Israetel's reaction has renewed an old gym argument. If the machine moves under an enormous load, does that automatically count as an impressive leg workout? The answer depends on what the lifter is trying to achieve and what is actually happening at the joints.
A leg press can be an excellent quadriceps exercise. It supports the torso, reduces the balance demands of a free-weight squat and allows a lifter to work hard without needing to stabilize a barbell. None of those advantages requires a theatrical pile of plates. The resistance printed in a video caption is not even a universal measure of difficulty: sled angle, starting resistance, leverage, friction and the machine's design all change the relationship between plates and force at the feet. Comparing two people's leg-press numbers across different machines is often meaningless.
The footage also invites a distinction between an attempted maximal display and a normal hypertrophy set. A tiny knee bend at the top of a leg press is a different exercise experience from a controlled descent to a repeatable depth. The first may involve substantial forces, but it exposes the knee and hip extensors to a narrower range and tells viewers little about how that lifter would perform with a standardized movement. There is no honest conversion from a short-range sled number to a full-depth squat or to a leg-press record on another machine.
Israetel's larger point is that the training stimulus should justify the setup. Loading and unloading plates, adjusting belts and constructing unusual configurations consume time that could otherwise go into useful sets. That does not make elaborate lifts inherently worthless; strongman contests and maximal strength demonstrations are legitimate pursuits. It means a bodybuilder should evaluate the session by muscular effort, controlled repetitions and progression rather than the camera-friendly total.
El Campeon is entertaining precisely because the spectacle is so far outside ordinary gym behavior. You can appreciate that spectacle without imitating it. Before copying any viral set, ask three questions: What movement is being trained? How much of that movement is actually completed? And can the setup be repeated safely enough to produce consistent progress over weeks? Those questions are more useful than asking whether the number in the thumbnail is bigger than your own personal best.
What the Range-of-Motion Research Really Says About Quad Growth
A dramatic quarter-rep is easy to criticize, but the science of range of motion deserves a more precise explanation than simply saying that every deeper repetition builds more muscle. Studies compare different exercises, different joint angles and different definitions of a partial. Those details matter. A partial that stays near lockout is not equivalent to a partial performed near the stretched position, and neither is identical to a controlled repetition through an individual's comfortable range.
A 2023 systematic review and meta-analysis by Wolf and colleagues found generally small advantages for full-range training across outcomes, while also reporting uncertainty and possible benefits from partials performed at long muscle lengths. Another review of the available literature emphasized that muscle growth can depend on where in the movement a partial is performed. The practical lesson is to choose a consistent, sufficiently challenging range instead of turning every set into a contest for the shortest possible travel.
There is an important leg-press-specific counterpoint. A 2025 study in resistance-trained people compared unilateral leg presses using roughly 5 to 100 degrees of knee flexion with the participant's maximum individualized range, averaging about 154 degrees. Over eight weeks, both conditions increased quadriceps muscle thickness, and the researchers found evidence consistent with no meaningful difference between the conditions they tested. That does not establish that five-degree knee flicks are just as good as substantial reps. Both groups trained through a meaningful arc, and the study was relatively short. It does show why claims that one universal depth always wins are too confident.
For a practical leg press, establish the deepest position you can control while keeping the pelvis and back stable against the pads. Avoid forcing the knees toward the chest if your lower back rolls off the seat. Lower the sled deliberately, keep the feet planted and push through a predictable path. The best working range may differ with body proportions, machine geometry, ankle mobility and hip comfort. What matters is using the same standard each session so a load increase reflects progress rather than disappearing inches of travel.
Consider two sets that both read 400 pounds. In the first, the lifter lowers the sled through a stable, repeatable knee bend for ten challenging repetitions. In the second, the lifter adds plates and performs a few rapid movements near lockout. The second number is bigger, but it does not prove a better hypertrophy stimulus. Track the combination of load, reps, effort and range, not load alone.
When Partial Reps Are a Tool Instead of an Excuse
Partial repetitions are not automatically cheating. A powerlifter may use a rack pull above the knee to practice a particular deadlift position. A weightlifter may program partial squats to overload a portion of the movement relevant to a sport-specific task. A sprinter may use limited-range strength work within a broader program. In these cases the range is selected in advance, the load is appropriate for the equipment and the exercise is judged against a specific objective rather than compared with a full-range personal record.
The distinction is especially important when discussing hypertrophy. Long-length partials deliberately work near a stretched muscle position; short-length partials stay near the shortened position. A 2025 multi-site trial comparing lengthened partials and full-range resistance training adds to an evolving evidence base, but its findings cannot be transferred mechanically to every leg press, muscle group or machine. The body adapts to the positions it trains, and strength measured at one joint angle may not carry over completely to another.
That specificity explains why a top-range quarter squat could have a role in a carefully designed strength program yet still be a poor substitute for all of a recreational lifter's leg work. If your goal is bigger quads, a leg press, hack squat or squat with a substantial controlled range is an uncomplicated foundation. If your goal is to improve a specific sticking point, you can add a targeted partial as an accessory while preserving your main movement standard. One tool does not need to displace the other.
A sensible experiment looks like this: complete your normal working sets first, then add one or two lighter sets in a deliberately chosen portion of the range. Keep the movement smooth, avoid bouncing off the stops and record which joint positions you are using. Stop if you cannot control the load or if the setup changes the machine's intended operation. A partial is only useful when you can describe exactly what it is meant to accomplish and evaluate whether it helped.
There is also a simple programming reason not to make every set maximal and abbreviated. Short-range efforts can tempt lifters to chase ever larger plate counts while fatigue and setup demands rise. That creates a distorted progression metric. A better test is whether your regular full or comfortably deep working sets improve over the next month. If they do, the accessory probably has a place. If the only number improving is the weight on a spectacular quarter-rep, reassess the exercise rather than celebrating the spreadsheet.
Three Belts, Extreme Loads and the Difference Between Support and Safety
A lifting belt can be useful, but it is not a force field. Many lifters wear one because it provides tactile feedback for bracing and helps them maintain a consistent trunk position under demanding loads. Whether it improves a particular leg-press set depends on the lifter, the machine and the belt's fit. A thick belt may even interfere with comfortable hip flexion if it jams between the thighs and torso near the bottom of the movement. The correct question is not how many belts fit around a waist, but whether one properly fitted belt helps the intended lift without compromising position.
El Campeon's habit of wearing multiple belts makes a memorable visual, which is exactly why it spreads. There is no good evidence that stacking three belts produces three times the support or makes an overloaded machine safe. More layers can complicate breathing, movement and the ability to judge how the trunk is responding. For most recreational lifters, consistent bracing and an appropriate load matter more than adding another accessory. If you do use a belt, learn how to brace into it rather than relying on the belt to create stability by itself.
The more consequential issue is the equipment. A leg press, Smith machine, cable station and squat rack each have manufacturer-specific loading limits, safety mechanisms and intended configurations. There is no universal safe maximum for every Smith machine or sled. Some commercial leg presses are built for very high plate loads; others are not. An impressive number in a video does not tell you the rating of the specific machine, the condition of its moving parts or whether improvised attachments change its engineering. Follow the posted instructions and the manufacturer's stated capacities, not the example set by an influencer.
Another overlooked risk is control at the ends of the movement. Do not slam a sled into its stops, bounce a bar off pins or abruptly lock the knees under a load you cannot manage. Set the seat and safety catches before beginning. Make sure the sled can be reracked from a position you can actually reach. If you cannot demonstrate a controlled rep with a load, it is too heavy for that exercise standard regardless of how many plates you have mounted.
Pain is not proof of a productive set, and extreme loading should not be presented as an injury-prevention strategy. A lifter with a history of knee, hip or back problems may need a different range, exercise or professional assessment. The goal is not to be afraid of heavy training; it is to make heavy training repeatable. Supportive equipment belongs in that process as a tool, not as permission to disregard the machine or your movement quality.
The Hidden Cost of Building a Giant Number on the Machine
A workout has a limited budget of time, attention and recovery. One reason Israetel objects to elaborate viral setups is that the setup itself can become the main event. Carrying plate after plate across the gym, arranging extra equipment and repeatedly adjusting a station may leave less time for the sets that actually create the training stimulus. That is a practical issue even if no part of the configuration is unsafe. A 45-minute session with fifteen minutes of productive work and thirty minutes of plate logistics is rarely the most efficient way to build legs.
A straightforward exercise earns its place when it is stable, easy to reproduce and demanding in the target muscles. The leg press is popular because a lifter can establish foot placement, adjust the seat and concentrate on knee and hip extension. A selectorized leg-extension machine is even faster to adjust. A hack squat offers a guided squat pattern. None is universally superior, and no one needs every machine in one session. Choose the equipment that lets you work through a consistent range without fighting the setup.
There is a social side to this too. Loading a shared leg press with every available plate and leaving it that way is inconsiderate to other members, especially those who cannot unload heavy plates easily. The same principle applies to blocking several stations for an improvised combination. Good gym etiquette is part of training efficiency: use what you need, rerack it and leave the station ready for the next person. A successful workout should not require making everyone else wait for a video to finish.
The smartest progression metric is boring in the best possible way. Record the machine, seat position, foot placement, working load, repetitions, perceived effort and approximate depth. If you perform three sets of ten at a stable range this week and three sets of eleven next week at similar effort, you have a clear improvement. If the plates increase but every repetition becomes shallower, the logbook can disguise a loss of work. Comparing two sessions without controlling technique is like comparing sprint times over different distances.
A useful rule is to separate demonstration sets from training sets. A planned heavy single on suitable equipment can be a meaningful strength test when it is done with the right preparation and safeguards. But do not let that test replace the volume that drives your actual goal. Most bodybuilding progress is accumulated across ordinary weeks, not in one clip. The less drama required to repeat the movement, the easier it becomes to measure what is improving and to make adjustments when progress slows.
A Two-Day Leg Plan That Builds More Than a Viral Plate Count
The useful takeaway from the spectacle is not that you should abandon heavy weights. It is that heavy weights should serve a clear training objective. Here is a simple two-day lower-body structure for a healthy recreational lifter who wants stronger, bigger legs. It can be adjusted for training experience and recovery. Leave at least two days between these sessions when possible, and reduce the total sets if you are new to leg training or already doing demanding sport practice.
Day A is quad-focused. Start with two or three progressive warm-up sets on a leg press or hack squat, stopping well before fatigue. Then perform three working sets of six to ten repetitions at a stable depth, finishing with roughly one to three repetitions in reserve. Follow with two or three sets of eight to twelve controlled split squats or reverse lunges per leg. Add two or three sets of ten to fifteen leg extensions, keeping the movement smooth rather than kicking the stack. Finish with two sets of standing calf raises in a comfortable range. The objective is hard work with a repeatable standard, not a new sled-loading record.
Day B balances the lower body. Begin with three sets of six to ten Romanian deadlifts or another hinge you can control, keeping the spine position steady and the weight close to the body. Follow with three sets of eight to twelve squats, leg presses or belt squats using a variation that feels different enough from Day A to manage fatigue. Add two or three sets of ten to fifteen seated or lying leg curls, then two sets of eight to twelve step-ups or walking lunges per leg. Finish with seated calf raises if you have time. If recovery is limited, remove an accessory rather than sacrificing technique on the main lifts.
Use double progression to advance. Choose a load that allows the bottom of the rep range with the prescribed effort. Keep the same load until you can reach the top of the range on every working set without shortening the movement. Then increase the weight by the smallest sensible increment and build the reps again. On a leg press, a modest load increase can be more productive than adding another enormous plate to each side. Write down the seat setting and range standard so that the next session measures the same task.
For the first four weeks, focus on consistency. In week one, establish loads and comfortable depths. In week two, try to add a rep where your technique allows. In week three, add a little load only to movements that have reached the top of their range. In week four, hold steady or reduce volume if fatigue is accumulating. A short video of one representative set can help you compare technique over time, but it should be a form check rather than a stunt. If a joint is painful, adjust the exercise or seek appropriate guidance rather than forcing the planned numbers.
The broader 2026 ACSM resistance-training guidance reinforces a simple point: meaningful gains do not require an exotic method for every workout. Enough hard work, progressive overload, sensible exercise selection and consistency can take you far. El Campeon's lifting is memorable entertainment; the workout that changes your legs is the one you can perform, recover from and improve next month. When the cameras are off, the quality of those ordinary repetitions matters much more than how many belts you wore.
Leg-day gym shirts and workout gear for lifters who never skip squats, lunges and lower-body punishment.
EXPLORE COLLECTION
