Biomechanics Jiu Jitsu…


In general, there are two approaches used to study mechanical aspects of human movement.  There is the quantitative approach that involves the use of numbers.  This approach helps to eliminate subjective description and relies on data from the use of different instruments.  It is a more scientific, publishable, and predictable analysis than the qualitative approach that implies that the movement is described without the use of numbers.  This approach is used a lot in coaching and during the teaching of sports skills.  Both quantitative and qualitative descriptions play important roles in the biomechanics analysis of human movement.

Biomechanics analyses can be divided into four areas.

(1) noncinematographic analysis;
(2) basic cinematographic analysis; (3) intermediate cinematographic analysis; and (4) Biomechanics research.

Noncinematographic analysis is the most common analytical technique used in sports by coaches, athletes, and others.  No film or videotape is used in capturing the performance and/or component parts of the execution of the motor skill.  It requires a disciplined approach to observing and, then, analyzing skills, but does not require intricate mathematical calculations.  It does require a full understanding of biomechanical principles.  Obviously, a qualitative analysis is subject to some error in interpretation.Basic cinematographic analysis involves the use of film or videotape for improving performance.  It does not involve any mathematical calculations.  One advantage of noncinematographic analysis is that you can see the movements in slow motion (frame by frame).  The analysis allows for seeing what actually occurred versus what you may think took place.  It is helpful in reducing the amount of guess work and, thus error in correcting motor skills since it is a qualitative analysis.

Intermediate cinematographic analysis requires some mathematical computations to enhance the analysis.  The use of film is necessary to capture the motor skill and subsequent analysis.  It is a quantitative analysis, where velocity and force (along with other data) are calculated, thus allowing for a significant reduction in guess work in analysis of component parts of a given skill.  As a result, the analysis increases the chances of teaching the skill correctly.

Biomechanics research involves highly sophisticated biomechanical equipment, such as high speed cameras, EMG for muscle involvement, force plates, transducers, computers, and much more.  The equipment allows for very accurate determination of factors that influence human performance.

It is the method for publishing in scientific journals, and usually a doctorate in biomechanics is needed.  As you might imagine, it takes a lot of time to reduce the data before treated with statistical procedures.

Biomechanics is important in jiu jitsu