and Study Aim
It can be said that recently, with the popularity of women’s football and playing at a professional
level, physical and physiological needs have increased. In this context, this study was conducted to
examine the relationship between isokinetic lower extremity strength and vertical jump parameters
in elite female football players.
The model of the research was the relational survey model, one of the survey models. The research
group consisted of 26 volunteer professional female football players competing at the Turkish
women’s super league level. The maximum strength of the knee extensor and flexor muscles of
female soccer players was measured using an isokinetic dynamometer device (Cybex NORM®,
Humac, CA, USA) that allows the recording of instant isokinetic torque. The vertical jump test data
of the female football players were determined with the Fusion Sport-Smart Jump brand jump mat.
While SPSS 25.0 package program was used for statistical analysis evaluation, correlation analysis
was applied to compare the relationship between isokinetic lower extremity strength and vertical
Results When the participants’ vertical jump, right knee flexion and extension degrees were examined, a
moderate positive correlation was found between the vertical jump parameter and the 240s Flexion
Right %Body Weight values, and no relationship was found between the other parameters and the
vertical jump. A moderate positive correlation was detected between the vertical jump parameter
and 240s Flexion Left %Body Weight. Another moderate positive correlation was found between
the vertical jump parameter and 240s Extension Left %Body Weight values. At the same time, no
relation was found between other parameters and vertical jumps.
Conclusions As a result, when the study results were evaluated, a positive relationship was determined
between vertical jump and right knee flexion parameters and similarly left knee flexion-extension
parameters. Based on this situation, it was concluded that the contraction levels of the lower
extremity strength, which plays an important role in determining the performance in the football
branch, contribute positively to the jump performance.
Keywords: football, isokinetic lower extremity strength, vertical jump, strength, football players