Analysis of Upper Body Transfer Momentum During Backhand Drive in Tennis Agus Rusdiana (a*), Angga M Syahid (b), Tian Kurniawan (a)
a) Sport Science Study Program, Universitas Pendidikan Indonesia, Jalan Dr. Setiabudhi No.229 Bandung 40154, Indonesia
*agus.rusdiana[at]upi.edu
b) Sports Physical Coaching study program, Universitas Pendidikan Indonesia, Jalan Dr. Setiabudhi No.229 Bandung 40154, Indonesia
Abstract
Very few studies have analyzed studies related to linear transfer of momentum and angular rotational momentum from the initial motion of the upper extremity to the impact of the ball during a one-handed backhand drive. The purpose of this study was to analyze the linear and angular momentum transfers from upper extremity to hitting the ball with a racket during one-handed backhand drive in tennis. The method used is descriptive with a qualitative approach. The subjects in this study were 12 male tennis players (mean ± SD- age 27 ± 3.72 years, height 169 ± 7.46 cm, weight 71.5 ± 8.32 kg). The study was conducted using 3 handycams, a calibration set, a dartfish pro motion analysis software, and a speed radar gun. The highest value of leftward linear momentum in the acceleration phase is 6.5 kg.m/s-1 which is indicated by the motion of the hand segment, while the peak of leftward linear momentum in the racket of 1 kg.m/s-1 occurs during the impact moment. The magnitude of the acceleration of the hand segment and also the forearm at the time of impact causes the maximum wrist force to be higher by reaching 331.5 ± 140.7 N. The conclusion of study shows that the hand segment contributes significantly to changes in linear momentum (leading and vertical direction) and angular momentum (supination).
Keywords: Tennis- one-handed backhand- linear angular momentum- sport biomechanics
