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# System prepended metadata

title: Influence of Strength Training on Sprint Running Performance

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Influence of Strength Training on Sprint Running Performance
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Introduction
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* Speend and strenght are inherently interrelated hence strength taining for sprinting must be view multidimensionally as different kind of strength is needed including:
    >1. The ability to accelerate the body mass when velocity is low. 
    >2. The ability to aplly forces to the ground when moving at more than 11m/sec.
* The purpose of this article is to reflect the current state of knowledge in the field of sprint running before discussing the possible merits of different strength training apporaches within this field.

1.Sprint Running:Why is it multidimensional.
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>### 1.1Phases in maximal sprint
+ Sprinting include three phases
    1. The accleration phase
        - The ability to perform a high initial acceleration over the first 100m.  
    2. The transition phase
        - The ability to attain high velocities in transition phase(10 to 36m)  
    3. Maximum running speed phase
        - The ability to maintain high running velocities between 36 and 100m.
+ The initial phase(1.) mostly determined by stride length while the latter phrase(2.,3.)is determined by stride frequency.
+ The performance in each phase is very specific and relatively uncorrelated to those in the other phases as there are differences not only in the nervous regulation of the movement but also in the functional role of the muscle involved. 
>### 1.2 Muscle Involvement in Maximal Sprint Running
* Sprint running required the body to propel it in a horizontal direction while counteracting the force of gravity in the vertical direction and because of the changes in the lean of the body different muscle is involved.
* During initial acceleration
    * The increasing activity of the knee extensors(include m.glutues maximus) while the decreasing activity of the hamstring as the body angle is more horizontal.
    * Much of the force comes from muscle contraction rather than elastic response.
* During full speed sprinting
    * Mainly determind by the action of the hamstrings, the m.gluteus maximus and the m. adductor magnus while the harmstrings are known to be the most contribution during the highest levels of speed.
* Research shown the variance of running speed of physical education students:
    * The first 15m :Concentric strength of knee and ankle extensor.
    * 20m to 40m:The strength of hamstrings.
![](https://i.imgur.com/pUKndIS.png)
* Note that these are not universal findings as some research find no correlation btween muscle and running speed. 

2.Strength Training Methods
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