Questions? Ready to start your project? Contact Us

9.09.2020

Biomechanical And Physiological Factors

A man working out

Coaching technique is about the interaction of different biomechanical and physiological factors coming into play during a movement.  Decisions of how to improve a lift are not as intuitive as one may expect. It is always important to examine the research and confer with the professionals before engaging in weeks, months or even years of seaking success.

The following is an example of how one might look into developing the conventional barbell deadlift by examining the contribution of the musculature involved and looking biomechanically where deficits may occur.  

Physiological:

During the deadlift movement the quadricep complex, that is, the muscles of the front of the thigh have greater activation when compared to gluteus maximus and the hamstrings. 

Within the three muscles of the hamstring complex the semimembranosus, semitendinosus and bicep femoris, the semitendinosus has a greater activation than the bicep femoris. 

The erector spinae muscles include, iliocostalis, longissimus and spinalis. These muscles run the length of the spine and present higher muscle activation than the gluteus maximus and the biceps femoris muscle of the hamstrings.

Biomechanical:

Biomechanically examining isometrically the various positions of the barbell deadlift, it is found the starting position of the movement is the weakest for the lifter. 

This is followed by the position of the bar at knee level.  The strongest position is when the bar is at mid-thigh, which is on the average about 70% stronger than the starting position. 

What can be counterintuitive is that the sticking point in the deadlift is not the position at the beginning of the lift deemed mechanically the weakest.  It is more complex as biomechanical and physiological factors must both be considered in the production of force. 

Knowing the above factors are important in developing a barbell deadlift, targeting specific muscular areas of the body and working on technique to take advantage of bar location and body posture are the basic keys to success.

Consider all factors when Getting Strong.

related

All Five Fingers

Using a Power Grip on the Pendulum Rope Pull The hand has its greatest gripping strength when utilizing a ‘power grip’, that is squeezing with all five fingers. When the thumb is negated, grip strength has the second greatest capability...

Hip Engagement 

There are an abundance of techniques utilized and taught to target the hips when squatting. Ankle, hip and thoracic mobility, posture, quad dominance, bar weight, bar height, stance and form adjustments are just a few of the things coaches address....

Molecular Training

In 1919 Lange wrote a scientific treatise entitled ‘About functional adaptation’…Uber Funktionelle Anpassung.This is what he said: “…. If, however, the muscle performance is increased merely by working against the same resistance as before for a longer time, no increase...