The power clean brings the bar from the floor to the front rack, caught above parallel. Build pull, hip extension and catch with a progression, not a shortcut.
In the power clean you bring the bar from the floor to the shoulders in one pull into the front rack and catch it above parallel, in a high squat. It is the base for the clean & jerk and a common part of WODs.
The honest answer: technique matures slowly here. In a study of 16 snatch novices (36 trials per learning model), no learning approach was superior for technique, and the novices' bar paths fell outside the usual world-class path after every model [1]. That was a power snatch, so transfer to the clean is an assumption; that technique takes extended practice is experience. So plan weeks and months, not days.
The risk lies in back, knee, shoulder and hands: in Olympic weightlifting the injury rate is, according to a recent review, about 2.4 to 3.3 per 1,000 training hours, most often at knee, lower back, shoulder and hands or fingers (powerlifting: 1.0 to 4.4) [2]. Among 109 CrossFit athletes, 45 % of shoulder injuries (9 of 20 cases) were associated with Olympic weightlifting [3].
So: build-up, not a shortcut. First hook grip, front rack, hang variation, then floor and weight.
In the hook grip the thumb sits under the fingers; it takes getting used to. In the front rack the bar sits on the shoulders, elbows pointing forward.
Milestone: 30 seconds in the rack, grip without shaking.
Bar hangs at the thighs, shoulders in front of the bar, chest open. Jump without weight, then with an empty bar; the arms stay passive. Use an external cue – an image from outside: "jump into the ceiling", not "tense the hips". This focus improves execution and retention according to a meta-analysis [4].
Milestone: 3×5 jumps with the bar, arms passive.
Extend hips and legs explosively, shrug the shoulders up, pull yourself under the bar and catch it in the front rack in a quarter squat. The elbows whip forward quickly.
Milestone: 3×3 with a stable catch, no chasing the bar.
The bar starts just below the knee. Bring it to the hang position and continue as before. This teaches the transition between first and second pull.
Milestone: 3×3 with a consistent bar path.
First pull: back long, bar close to the body, legs push. Then the second pull: extend the hips explosively. Then the catch. One rep at a time, each one lowered under control.
Milestone: 5 clean single reps, the bar stays close to the body.
The power clean is safety-critical, not because of magic but because of load and speed. A meta-analysis of 9,306 CrossFit participants found 3.20 injuries per 1,000 hours, most often at spine (26.8 %) and shoulder (25.9 %) [5]. In studies of CrossFit workouts, peak heart rate averaged about 184 beats per minute, and a review puts recovery after a hard workout at 48 to 72 hours (varying by workout) [6]. Technique breaks first under fatigue.
In practice: learn to bail the bar forward, train with bumper plates and do no heavy reps inside a conditioning WOD. A systematic review (11 of 12 studies of poor methodological quality) reports from single studies: injured athletes in one shoulder study named wrong technique as the cause in a third of cases, and soldiers with a previous joint injury had a 3.75 times higher injury risk (very wide confidence interval: 0.88 to 18.6) [7]. Treat that as a hint, not as proof.
This guide explains and motivates but does not replace supervised training. Get a coach before you go heavy.
Film yourself at halfway through the pull. Most mistakes happen when the bar passes the knee. A side video shows whether the bar stays close to the body – that matters more than any weight increase. And one comfort: in a small study of 32 men (CrossFit novices and competition-experienced athletes), CrossFit experience explained performance in two test WODs best, ahead of VO₂max or anaerobic peak power [8]. Technique grows with repetition (experience).
And a rule for heavy days: if the bar travels on a different path every rep, you are too heavy. Go back to a weight where three reps in a row look almost identical – then the load is right, and only then may the weight grow.
In the power clean you catch the bar above parallel, in the squat clean in a deep squat. The power clean is technically easier and the usual start in CrossFit training.
With an empty bar until 5 single reps are clean. Then increase in small steps. We do not quote fixed percentages without a source.
The thumb sits under the fingers on the bar, with the fingers clamping it. It holds the bar more firmly, is uncomfortable at first and takes getting used to. Many coaches recommend it (practice); if you cannot tolerate it, straps can help.
Often the front rack is gripped too tightly or the elbows are not forward fast enough. Grip loosely, rotate the elbows quickly, practise rack mobility separately.
The basic form often sits after a few weeks; consistency with weight takes months (experience). In a study of 16 novices, the bar paths (power snatch) fell outside the usual world-class path [1].
Learn the Power Snatch: The Bar Overhead in One Pull