The clean and jerk is a two-part weightlifting movement where you lift a barbell from the floor to your shoulders (the clean), then drive it overhead to full arm extension (the jerk). It’s one of two competition lifts in Olympic weightlifting, alongside the snatch, and it allows athletes to move more total weight than any other overhead lift. Elite lifters can clean and jerk well over twice their body weight.
The lift demands a rare combination of raw strength, explosive speed, coordination, and mobility. Because it moves a heavy load through such a large range of motion at high velocity, it’s also widely used outside competitive weightlifting as a training tool for athletes in dozens of sports.
How the Clean Works
The clean is the first half of the lift: getting the barbell from the floor to the front of your shoulders, a position called the front rack. Coaches break this into three distinct pulls, each with a different job.
The first pull is the initial lift off the floor. Your shoulders stay over the bar as your legs push the ground away. This phase is relatively slow and controlled, building tension through your legs and back. Once the bar passes your knees, you transition into the second pull, where your shoulders shift to a position on top of or slightly behind the bar. This is the explosive phase. Your hips and knees extend rapidly to accelerate the barbell upward, generating peak power. Research on collegiate athletes measured peak power output during the power clean at roughly 1,860 watts, with bar speeds near 1.6 meters per second at maximal loads.
The third pull is what separates the clean from a deadlift or a shrug. Once you’ve fully extended your hips, you aggressively pull yourself under the bar, dropping into a full front squat position and catching the barbell across the front of your shoulders. You then stand up out of that squat to complete the clean. The entire sequence, from floor to standing with the bar on your shoulders, takes about one to two seconds.
How the Jerk Works
With the barbell resting on your shoulders, you pause briefly, then perform the jerk: driving the bar overhead and locking your arms out. Every jerk style shares the same opening mechanics. You dip by bending your knees slightly while keeping your torso vertical, then immediately reverse direction, driving the bar upward with your legs. As the bar rises, you push yourself under it and lock your arms out overhead.
Where jerk styles differ is in how you receive the bar overhead:
- Split jerk: The most common style in competition. You split your feet into a lunge position, one forward and one back. This allows you to get low under the bar while staying stable, and it’s the most forgiving of small positioning errors. If the bar drifts slightly forward or backward, the split stance lets you make quick micro-adjustments with your feet.
- Power jerk: Your feet stay in a squat stance and you catch the bar with your thighs above parallel. This requires more precise overhead positioning but can feel more natural for athletes with strong pressing strength and good shoulder mobility.
- Squat jerk: The rarest style. You drop into a full overhead squat to receive the bar. It demands exceptional mobility and balance, but allows you to get very low under the bar, which can be an advantage for certain body types.
In competition, the lift is complete when you stand up from your receiving position with the bar locked out overhead, feet in line, and your body motionless. Referees watch closely for “press-outs,” which occur when a lifter continues extending their arms after reaching the lowest point of their catch position. A press-out results in a failed lift.
Muscles Used in the Clean and Jerk
The clean and jerk is a true full-body movement. During the pulling phases of the clean, the primary drivers are the glutes, hamstrings, and quadriceps, with the large inner thigh muscle (adductor magnus) contributing significantly to hip extension. Your entire back, from the spinal stabilizers along your lower back up through the muscles between your shoulder blades, works to keep your torso rigid and the bar close to your body.
The core muscles play a continuous stabilizing role. The obliques act as rotators and trunk stabilizers, while the lower back muscles brace the spine throughout the pull and the squat. The muscles around your hips and pelvis fire to keep everything aligned under rapidly shifting loads.
During the jerk, the demand shifts. Your legs generate the initial drive, but once the bar is overhead, your shoulders take over as stabilizers. The front of the shoulder is heavily active during the lockout and overhead hold. Your upper back and the muscles surrounding the shoulder blade work to keep the bar balanced directly over your center of mass.
Why Athletes Train the Clean and Jerk
The clean and jerk produces force at high speed, which makes it uniquely effective for developing explosive power. The goal is to move the bar as fast as possible, which forces your nervous system to recruit fast-twitch muscle fibers, the ones responsible for sprinting, jumping, and rapid changes of direction. Research comparing Olympic-style lifting to slower strength training methods like powerlifting found that the high-velocity demands of the clean and jerk specifically improved explosive ability in ways that slower lifting did not.
That nervous system training effect is the main reason coaches in sports like football, basketball, and track prescribe the clean and jerk. It trains your body to produce large amounts of force in very short time windows, which directly translates to athletic movements. Beyond power development, the lift also builds strength in connective tissue and joint capsules, reinforces whole-body coordination, and creates significant metabolic demand because so many large muscle groups fire in a short burst.
The explosive hip extension in the second pull also has a useful flexibility benefit. When your glutes and hamstrings contract forcefully, the opposing hip flexor muscles on the front of your thigh are forced to lengthen, which can counteract the tightness that comes from sitting all day.
Competition Standards and Equipment
In Olympic weightlifting competitions, athletes get three attempts at the clean and jerk. Each attempt is judged by three referees who watch for specific faults. Beyond the press-out rule, any deliberate oscillation (bouncing) of the barbell before beginning the jerk is also a foul. The athlete must be completely motionless before initiating the dip and drive. Any attempt where the bar reaches knee height but isn’t completed counts as a failed lift.
The men’s competition barbell weighs 20 kilograms (about 44 pounds) and has blue markings, while the women’s bar weighs 15 kilograms (about 33 pounds) and carries yellow markings. Both bars are built to flex under heavy loads, and that controlled flex (called “whip”) actually helps experienced lifters during the jerk by allowing them to time their dip with the bar’s natural oscillation.
Common Injury Sites
Weightlifting has a training injury rate of roughly 2.4 to 3.3 injuries per 1,000 hours of training, which is comparable to or lower than many recreational sports. The most frequently injured areas are the knee (21% of injuries), lower back (19%), hands and fingers (15%), and shoulder (15%).
Knee injuries are the most common largely because of the deep squat positions required to catch the clean. The full-depth front squat creates higher biomechanical forces at the knee and ankle compared to the shallower squats used in powerlifting. Shoulder injuries typically occur during the overhead receiving position of the jerk, where the joint must stabilize heavy loads at full extension. Lower back injuries tend to stem from the cumulative loading of the pulling phases, especially when fatigue degrades positioning. Most of these injuries are overuse-related rather than acute, meaning they develop gradually from training volume and load rather than from a single catastrophic event.