Barbell & Olympic Weightlifting

Full-timeline processing preserves motion order, but blur, obstruction, changing views and tracking errors can still hide or misidentify a fast phase. Beta output is experimental. The report does not grade technique, prescribe a safe load or decide whether a competition lift passes.

• film one clear repetition
• replay each timestamp against the original clip
• identify the visible arm, joint and phase when correcting feedback
• read camera and visibility limits first

• treating experimental output as validated accuracy
• assuming every attempted frame produced a correct pose
• treating an observation as a calibrated measurement

• review one repetition with a coach
• film the next attempt from a similar view

Different views answer different questions. Front and rear footage cannot establish side-view squat depth or forward/back bar path. Rear footage may hide the front rack; side footage hides far-side symmetry. No calibrated distances are reported.

• keep the camera still at roughly hip or bar height
• include the floor, feet and overhead bar position
• use a second angle when an important detail is hidden

• camera panning or zooming
• comparing apparent alignment across different views
• treating perspective distortion as a technique fault

• record a stable front or rear reference clip
• record a separate side-view attempt for additional context

Landmark occlusion, loose clothing and motion blur can reduce usability. Body points that are not clear enough are left unmeasured in the report. An apparent angle alone does not establish a fault or injury risk.

• read the detected camera view
• inspect visibility limits before drawing conclusions
• compare only similar movements and recording conditions

• equating a low angle with a universal technical fault
• treating a model estimate as a medical finding
• assuming the sampled range contains every rapid peak

• review clear footage with a qualified coach
• re-film when the important action is blurred or obscured

An official lifting decision requires the complete attempt and qualified application of the relevant rules. A small set of 2D body and bar checkpoints cannot establish a valid lift or a press-out decision.

• separate training feedback from a referee decision
• use the published IWF rule edition appropriate to the event

• calling a measurement report an IWF score
• judging an attempt from isolated frames

• review the full attempt with a qualified coach or technical official

Large shifts toward the toes or heels often create compensations in bar path and joint sequencing.

• whole-foot pressure
• stay connected to the floor
• finish balanced

• early shift to toes
• heels unload prematurely
• backward recovery step

• tempo pulls
• pause-at-knee variations

Loss of trunk control can change bar position and load distribution; visible spinal shape alone does not establish injury risk.

• brace before load leaves supports
• keep torso change intentional
• avoid breathless repetitions

• brace lost during transition
• uncontrolled torso collapse
• overextension at lockout

• paused squat
• tempo eccentric
• submaximal positional holds

Unnecessary horizontal displacement increases the correction required later in the lift.

• keep the bar close
• move around the bar with purpose
• finish vertically

• bar loops forward
• bar drifts around the knees
• contact drives the bar away

• halting pull
• no-contact variation
• pull to power position

A timing error can produce a technically similar final position through a less repeatable path.

• push then transition
• keep positions connected
• finish before pulling under

• hips rise faster than shoulders
• premature arm bend
• early pull-under

• segment lift
• tempo first pull
• high-hang variation

One universal set of joint angles is not appropriate for every lifter or squat style.

• descend over the mid-foot
• track knees consistently
• drive through the sticking region

• uncontrolled descent
• asymmetric shift
• bar moves outside the base

• tempo squat
• pause squat
• pin squat

A late or soft receiving action reduces the time available to stabilise the system.

• turn over aggressively
• reach into the bar
• settle before standing

• press-out pattern
• bar received forward
• feet land excessively wide

• tall snatch
• drop snatch
• overhead squat with pause

Connected turnover timing improves control and the quality of the recovery.

• stay close
• fast elbows
• meet the bar

• bar crash
• slow elbows
• forward rack catch

• tall clean
• clean from power position
• front squat with controlled rack

A displaced or disconnected dip changes the direction of force and the bar's receiving path.

• dip through the legs
• drive vertically
• lock before the feet settle

• forward dip
• pause between dip and drive
• bar received in front

• jerk dip squat
• tall jerk
• pause dip jerk