Kinetic Features Squat and Countermovement Jumps

A comparison of the kinetic characteristics of
the squat and countermovement jumps
STUDENT DETAILS
STUDENT DETAIL

HUMAN MOVEMENT 1
Introduction
Sports biomechanics studies indicated human motion during exercise and sports activities.
Athletic and any physical activity in sports are conducted on the basis of the principle of the
law of mechanics. Not only in sports but biomechanics can be applied to normal physical
activity also (Aeles, 2018). With the help of sports biomechanics, athletes and performers
learn effectively about analysing their movement during exercise and sports activity
(Cushion, Goodwin and Cleather, 2016). In this report, there will be a discussion about a
comparison of the kinetic characteristics of the squat and countermovement jumps by
utilizing secondary collected data. This discussion will also incorporate the utilization of
theories and formulas of relevant measures in an effective and efficient way.
Methodology
For this section, secondary data will be utilized. This secondary data will incorporate the lab
studies and research of peer-reviewed literature. As research indicates that the relativeness in
squat movement as compared to kinetic energy utilizes elastic energy for the performance
enhancement in countermovement jump (CMJ) (García-Ramos, et. al., 2017). As this
secondary study is based on the test of 6 male volleyball players that performed CMJ with
squat jumps. In this observation, the primary parameters for incorporation include kinematics,
kinetics, and muscle electrical activity that directly creates pressure on the six muscles of
push-off that is the same as SJ and CMJ. In another word, this study indicates that while
playing volleyball three energy take incorporation (similar to as the law of mechanics) which
are kinematics, kinetics and muscle electrical activity. With this relevance energy, it creates
pressure on the functions of the six muscles of legs in an effective and efficient way (Driller,
et. al., 2017).
The formula for calculating reactive strength index are:

HUMAN MOVEMENT 2
 Formula 1: Reactive strength index (RSI) = Jump of the jump Height / Time (in which
body comes back to the ground)
 Formula 2: RSI = Flight time / time
 Formula 3 = Height measure of jump/ take off time (Gencer, et. al., 2018).
These are the formulas for calculating RSI for CMJ and SJ. In calculating these formulas, the
law of mechanics plays an important role. While calculating ground time, knees should be
bent at 90 degrees. At the time for calculating take-off time, jumps should be done in the
vertical position as much high as possible (Lorenzetti, et. al., 2019).
(Norton, 2018)
Results
It is analysed that CMJ and SJ are widely recognised as the major performance indicator to
analyse the performance of an athletes. As compare to these both jumps (CMJ and SJ), CMJ
is better performance indicator as compare to the SJ because in CMJ it is important to
properly utilize the stretch-shortening cycle which drives accurate results while conducting a
session for judging the performance of the athletic in an effective and efficient way (Wells,
et. al., 2018). Moreover, it is also derived that understanding this mechanism is also