« RIP LT Murphy. "Murph" @ CFO | Main | CrossFit Kids!!!! Start em' Young... »

December 8, 2006

Analysis of a Clean, Part 1


Grab a cup of coffee 'cause this is a long one! If nothing else, perhaps I'll aid in your getting a good night's sleep.

We captured this video of Nicole performing hang squat cleans earlier this morning.

Nicole has come a long way with her cleans. This is really good stuff. When Nicole first came to us, she was strictly an arm puller, lacking the ability to pull herself under the bar (the skill that separates decent lifters from great lifters).

The first thing that you want to take a note of in Nicole's clean is the lines formed by the relationship between her body, the bar, and the floor.

Most of the lifting we do comes down to simple geometry (with a dash of physics thrown in). The cleaner the lines, the more force one can generate. So what's the proper line for a clean? Vertical! You want as much force as possible being directed upward. This allows you to create momentum and acceleration on the bar (thanks, Coach B, for adding "momentum and acceleration" to the CrossFit vernacular), allowing the bar to remain weightless for a split second--just long enough for you to pull yourself under it with everything you have and land in a rock-bottom front squat.

Having said that, there's room for improvement with Nicole's clean, as the frame-by-frame sequence (43 frames in total) below demonstrates.

Nic_Clean_03.jpgNic_Clean_04.jpgNic_Clean_05.jpgNic_Clean_06.jpgNic_Clean_07.jpgNic_Clean_08.jpgNic_Clean_09.jpgNic_Clean_10.jpgNic_Clean_11.jpgNic_Clean_12.jpgNic_Clean_13.jpgNic_Clean_14.jpgNic_Clean_15.jpgNic_Clean_16.jpgNic_Clean_17.jpgNic_Clean_18.jpgNic_Clean_19.jpgNic_Clean_20.jpgNic_Clean_21.jpgNic_Clean_22.jpgNic_Clean_23.jpgNic_Clean_24.jpgNic_Clean_25.jpgNic_Clean_26.jpgNic_Clean_27.jpgNic_Clean_28.jpgNic_Clean_29.jpgNic_Clean_30.jpgNic_Clean_31.jpgNic_Clean_32.jpgNic_Clean_33.jpgNic_Clean_34.jpgNic_Clean_34.jpgNic_Clean_35.jpgNic_Clean_36.jpgNic_Clean_37.jpgNic_Clean_38.jpgNic_Clean_39.jpgNic_Clean_40.jpgNic_Clean_41.jpgNic_Clean_42.jpgNic_Clean_43.jpgNic_Clean_44.jpg


(Editorial Note: I'll apologize upfront: for ease of reading I've had to repost the specific frames I want you to look at. I'll learn how to put numbers on the pictures--without degrading the quality of the pictures--the next time I post such a sequence in order to avoid double-posting the pictures.)

What I'm about to do may come across as nitpicking, but by making a few small changes in her technique, Nicole can easily increase her clean poundage. Small changes changes in technique can have a huge impact on results.

Frame 8

Nic_Clean_10.jpg

This frame is critical. In it we see that Nicole has fully extended her legs (they're straight) but has not extended her hip completely (there's still a bend in her hip--it's not vertical). This has caused her to initiate an early arm pull (it's early because she's pulling ahead of her hip extending) and results in the bar moving away from her body (horizontal displacement of the bar).


Frames 9-12

Nic_Clean_11.jpgNic_Clean_12.jpgNic_Clean_13.jpgNic_Clean_14.jpg

This sequence of frames shows Nicole continuing to pull the bar up with her arms, rather than just pulling herself under the bar (it's important to note that she is pulling herself under the bar; it's just that there's a lot of arm pull going on, too). You can see this if you look at the height of the red plate against the black mat that we've stacked against the wall. It continues to move up as each frame in this sequence goes along.


Frame 18

Nic_Clean_20.jpg

This is the frame in which Nicole finally catches the bar. The good news is that she's in a beautiful, deep front squat. The bad news is that the bar has dropped significantly from its max height, resulting in a power clean being ridden down to a front squat. Fortunately, Nicole is able to control the bar on the way down and avoids having the bar crash down on her (she won't have this luxury as the weight she is cleaning goes up).


Thanks to Nicole for being a good sport and allowing us to pick apart her clean. She already has good technique; with a few slight changes she'll be crushing her current PRs in no time flat.

CFO Members
: We're more than happy to perform this type of analysis for you (video + frame-by-frame). If you'd like us to perform such an analysis for you, please say so in our "Comments" section so that we can set aside some time for you. And don't worry, we won't post anything to the blog without your consent. Our intention is to improve your lifting technique, not add to our collection of online videos (of course, we'll be happy to post it to the blog if you want us to!).

Look for Part 2 of this analysis coming soon!

Posted by Mike Minium at December 8, 2006 2:56 PM

Comments

This was also a fascinating example of the Observer effect

In the social sciences and general usage, the effect refers to how people change their behavior when it is observed and set down. People often do not behave in their usual manner when aware of being watched (see Hawthorne effect).

http://tinyurl.com/ye7ncv

Nicole asked for video to be taken so she could analyze her form. The mere act of the video being taken improved her form (Mike's critique notwithstanding).

Posted by: Max Lewin at December 8, 2006 4:52 PM

yikes! that frame by frame is effective (cringe)...this is especially useful if you are a donkey kicker!

Posted by: Nicole Okumu at December 8, 2006 5:10 PM

Who wouldn't want their clean nit picked?

Sign me up.

Posted by: Tim at December 8, 2006 5:49 PM

Totally - sign me up for clean nitpicking/constructive criticism too.

Posted by: Carlo at December 8, 2006 8:17 PM

Go Nicole, nice work on the clean, plus thanks for the the tips with the ball. I still have a long way to go on this one......

F

Posted by: Franklin O at December 9, 2006 12:27 AM

Here's a link to the Burgener Oly Warmup. The PDF has tons of photos. Very helpful.

http://www.crossfit.com/cf-info/faq.html#Exercises12

Posted by: Tim at December 9, 2006 11:24 AM

Here's a link to a PDF of the Burgener Oly Warmup. Includes photos. Very helpful.

http://www.crossfit.com/cf-info/faq.html#Exercises12

Also, how many reps did we do of the one-armed snatch today? 12 per or 15?

Posted by: Tim at December 9, 2006 11:30 AM

It may've felt like 15 but it was only 12.

Posted by: Mike Minium at December 9, 2006 12:00 PM

12 per arm, to clarify.

Posted by: Mike Minium at December 9, 2006 12:03 PM

72 total

Posted by: Max Lewin at December 9, 2006 1:27 PM

Well, that makes it seem more substantial.

Posted by: Tim at December 9, 2006 2:21 PM