Tuesday, July 26, 2011

Common Mistakes on the Clean & Jerk


The clean & jerk is one of two Olympic lifts, with the other lift being the snatch. These lifts work on strength, power, speed, flexibility and coordination like no other. The Olympic lifts are also notoriously unforgiving of poor form and this inhibits many athletes from progressing very far in these lifts. The following chart will help outline some common, faults, causes, and the suggested corrections you can take to fix your lifts.

The Clean - Faults, Causes and Corrections
Fault
Possible Cause
Suggested Correction
  1. Lifter elevates Buttocks before raising bar

  • Insufficient leg strength
  • Insufficient flexibility
  • Weak posture muscles
  • Ankle tightness
  • Standard strength exercises
  • Lifting standing on blocks
  • Incorporate flexibility as a core element of training
  • Introduce core stability exercises as a core element of training
  • Seek professional advice (shoe implants, screening)
  1. Bar ends up being forward
  • Early movement onto toes before the bar reaches the knee
  • Projection of the bar is positioned ahead of the metatarsal-phalangeal joints, with a greater inclination of the shins in the starting position, therefore in lifting the weight the bar has to travel around the knees i.e. the bar turns out to be in front of the lifter.
  • The lifter does not fully straighten the trunk and legs and failing to utilize explosive hip drive
  • Arms bend early at the elbows
  • Elbows are taken back early in the final extension movement
  • The lifter fails to accomplish an upward pelvic rotation at the top of the pull extension
  • Position the bar closer to the ankle joints and ensure the shins at the start have a shallow inclination (Ankle angle should not be less 60-70 degrees.
  • Balance on both feet from start to full extension of the pull
  • Aim for fully extended legs, hips, trunk and shoulders
  • Elbows must move strictly upwards parallel with the trunk throughout the pull
  1. Bar is pulled excessively
  2. Backward
  • Early movement onto heels
  • Arms bend far too soon
  • Shoulders move back ward
  • Head is thrown back viciously
  • Balance on both feet
  • perform pulls standing on blocks
  • Elbows must move strictly upwards parallel with the trunk throughout the pull
  • Pulls and other movements from blocks set at designated heights
  • Perform Cleans from mid-thigh/waist using light weights
  • Increase back and abdominal (core) strength utilizing specific exercises
  1. Bar is lifted far away
  2. from shins in opening phase of Clean
  • Shins are too inclined
  • Angle of the ankle joint is to acute (less than 60 degrees)
  • Bar is positioned too far from the lifter
  • Position bar over metatarsal-phalengeal joint
  1. Bar travels forward
  2. Reacting from the thigh push
  • Lifter thrusts hips through not upward
  • Lifter sufficiently straightens legs but not hips
  • Lifters trunk remains inclined but hips travel forward
  • Ensure correct starting position
  • Keep balance
  • Ensure bar travels in most efficient line
  • Pulls from knee (concentric/eccentric)
  • Shrugs
6. Weak Full Extension


  • Insufficiently strong muscles
  • Too great a weight
  • Lifter fails to place knees under the bar to instigate upward bar trajectory
  • No coordination between extensors of legs, hips and trunk and
flexors of arms and shoulders
  • Build strength
  • Perfect practice = perfect skill application
  • Sub component exercises designed to enhance force application
  • Pulls from varying heights
  1. Bar Racked but not Secured

  • Lifter does not have sufficient time to rotate elbows
  • Collapsed chest
  • Lifter delays drop and looses momentum
  • Lifter drops rather than drives under the bar
  • Lack of flexibility around joint complexes
  • Emphasize drive under the bar
  • Clean drops from full extension
  • Correct breathing technique
  1. Knee Touch
  • Trunk inclined too far forward
  • Elbows not fully rotated
  • Bar not received on clavicles
  • Lethargic descent under the bar
  • Perform properly executed pulling movements
  • Cleans from varying heights
  • Specialized flexibility
  • Perform Bench and Incline Press


The Jerk - Faults, Causes and Corrections
Fault
Possible Cause
Suggested Correction
1. Weak Jerk
  • Lifter fails to make the preparatory dip on full feet but on toes
  • Lifter does not balance on two legs
  • Trunk inclines forward
  • Chest drops during dip
  • Hands grip bar too tightly
  • Bar lifts off clavicle during preparatory dip
  • A deep slow dip
  • Slow straightening of the legs
  • Keep the weight of the bar across the clavicles
  • Coordinate muscle and joint action to instigate the necessary force
  • Employ a soft grip to the bar
  • Keep trunk upright
  • Dip on both feet quickly
  • Stop the downward movement sharply
  • Utilize the elasticity of the bar
  • Straighten the legs vigorously
  • Instigate the greatest speed in the upward movement of the bar
  1. Bar turns out to
  2. be forward
  • The lifters does carry the shoulders and hips under the Center of Gravity
  • Preparatory dip is performed on the toes
  • The jerk off proceeds forwards and upwards away from the lifter
  • Feet do not split equally fore and aft
  • Chest drops
  • Weak postural muscles
  • Elbows are too far back
  • Perform preparatory dip on whole feet
  • Hold elbows slightly forward
  • Jerk off should be strictly upwards
  • Pelvis should be locked
  • Only knees displace form the mid-line
  • Include Jerk Balance as a corrective exercise
  1. Lifter drops too much in the Split
  • A slow deep preparatory dip
  • Limited drive from dip
  • Lifter travels very low in split to catch the bar on straight arms
  • Insufficient strength and coordination
  • Increase effort of upward drive
  • Practice Jerk Heaves
  • Half Front Squats
  • Speed
  1. Bar is jerked to straight arms but turns to be far back and holding the weight aloft is impossible
  • The Jerk of the bar is not vertical
  • The Jerk has significant horizontal translocation
  • The lifter moves hips, trunk and shoulders too far forward
  • Strict movement in pure vertical plane
  • Ensure hips, trunk and shoulders are placed exactly under the center of gravity
  • Practice Push Press, Jerk Balance, Jerk Heaves and Jamieson Squat exercises
  1. The bar is correctly jerked upwards to straight arms, but the lifter cannot hold onto the weight on straight arms
  • Poor movement in elbow joints
  • Insufficient mobility in shoulder joints
  • Excessive flexibility in radio-carpal joints >90 degrees
  • Work on exercises designed to develop flexibility in the elbow and shoulder joints
  • Bandage wrists or make use of wrist-band
  • Position bar closer to wrist joint
  • Turn forearms slightly out wards on the dip and drive
  1. Jerking the bar to arms length the lifter moves around the platform with weight aloft
  • Inexact work of the legs (asymmetrical)
  • Center of gravity situated outside of the base
  • Head thrown back and lifter looks upwards at the bar
  • Head is forced forward and shoulders extended
  • Legs cross paths
  • Head pressed into chin
  • Execute aggressive jerk off
  • Essential to split the legs fore and aft evenly and maintain shoulder width distance L-R
  • Hips, trunk and shoulders should be directly under bar
  • Head held straight looking forward

The above matrix relating to the Clean and Jerk mistakes is by no means exhaustive. Moreover, there are many different and subtle mistakes not listed above.
Prevention is better than cure. Technical mistakes need to be nipped as soon as they appear. The correction of mistakes, especially old ones, which are strengthened in the course of training, are very difficult to eradicate. 

On another note: Christina made chocolate chip cookies. Feast mode engage!


Chart taken from "qwa.org". To read the original article, please visit this link

3 comments:

  1. Are you not going to bother referencing this from where you stole it from?

    ReplyDelete
  2. It clearly says "Chart taken from "qwa.org". To read the original article, please visit this link" at the bottom.

    Read the whole page next time, anonymous.

    ReplyDelete
  3. Love the tips. Definitely a huge fan of the blog. Great job on keeping everyone informed and entertained.


    Mark Eckroth

    ReplyDelete