Dr Mel Siff Compares Novice vs Expert Bench Pressers
You may recall my referring before to Dr Tom McLaughlin’s book on the biomechanics of bench pressing (“Bench Press More Now”) — well, here is an interesting paper that he and a colleague wrote on the biomechanical differences between novice and expert bench pressers.
Madsen N, McLaughlin T
Kinematic factors influencing performance and injury risk in the bench press exercise
Med & Science in Sports & Exercise. 16(4):376-81, Aug 1984.
The purpose of this research was to identify kinematic factors that could be relevant to performance and injury risk in the bench press. The methods used included: use of high-speed, 2D cinematographic procedures to record the performances of 36 subjects (19 experts and 17 novices), determination of the kinematic and kinetic differences between the groups, and identification of a rationale describing how those kinematic differences could lead to the kinetic differences. Kinematic factors so identified could influence performance and injury risk.
In addition to the fact that experts were able to lift 79% more weight than the novices, the pertinent KINETIC DIFFERENCES included the following:
1. the difference in peak force exerted while lowering the bar was only 43%;
2. the difference in peak force exerted while raising the bar was only 45%;
3. the difference in minimum force exerted while raising the bar was 87%.
There was no significant difference in torque required at the shoulder.
The relevant KINEMATIC DIFFERENCES were:
1. the expert group maintained a smaller bar speed while lowering the bar,
2. the expert group used a bar path closer to the shoulders; and
3. the expert group used a different sequence of bar movements.
The roles of these kinematic factors in the bench press merit further
investigation.
It would be interesting to compare above finding No 2 with the Westside recommendation to follow a lower trajectory than one that is closer to the shoulders. Comments on all the above findings would also be of great interest to many.
Please share your thought on this topic at our Supertraining Yahoogroup.
Dr Mel Siff
http://www.drmelsiff.com
Author of Supertraining and Facts and Fallacies of Fitness
Article Source:http://www.articlesbase.com/computer-forensics-articles/dr-mel-siff-compares-novice-vs-expert-bench-pressers-1766454.html
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