Jakten på det perfekta handbollsskottet: Analys av avstämt handbollsskott
Typ
Examensarbete på kandidatnivå
Program
Publicerad
2021
Författare
Claesson, Albin
Haga, Jakob
Hagström, Gustav
Hansson, Simon
Lorén, Robin
Skogum, Christoffer
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
The aim of this study was to investigate the running shot in handball. A selection of 90
players were set to perform a running shot from seven meters, aiming for a 30cm×30cm
target, five times each. All shots were filmed to be analyzed in Python and MATLAB
in order to convert visual appearence regarding the players techniques into measurable
values. Another point of interest was to explore the chain of muscle activaton during the
shooting sequence. This study was performed on two players of different age and sex with
the aid of electromyography.
There were no concrete statistical correlation between the speed of the shot and accuracy
for any age group. Pertaining the correlation between player length, weight, arm length
and shot speed, weak to moderate connections on the mens side were found. Furthermore
the connections between shot speed and player experience were continually increasing with
age on the mens side. On the womens side the connection between hand circumference and
player experience had a moderate connection to shot speed for the younger age groups.
Using video analysis, it was found that the older players use the rotation in the hip to
create torque in combination with folding the upper body to maximize the length of the
lever-like motion with the arm. A higher positioning of the shooting arm’s shoulder means
that the arm is stretched higher up and results in a longer lever that helps to throw the
ball at a higher speed. Furthermore, it was stated that the magnitude of the force in the
flick movement of the hand affects the speed of the shots. A higher flick force resulted
in a faster shot. Younger players mainly took advantage of their running speed to shoot
faster shots, but did not use the flick motion.
From the study of muscle activation, it could be stated that the two players activated
their muscles in different segments during the shooting sequence. The younger player
used the biceps muscle at the moment of shooting, unlike the older players who mainly
used the forearm. Furthermore, the use of the triceps muscle differs. The older player only
activated the muscle before the shot and during braking, while the younger one used the
muscle during the complete shooting sequence and braking. The trapezius muscle was used
similarly between the players. It was stated by the muscle activation of the brachioradialis
muscle that the older player used the flick significantly more than the younger player. The
difference in activity for the brachioradialis muscle is referred partly to the use of resin
for the older player and partly to the fact that the electrodes on the younger player may
have come loose during the test.
Beskrivning
Ämne/nyckelord
Handboll , avstämt skott , skottkorrelation , videoanalys , elektromyografi , EMG