INTRODUCTIONChronotype
is an individual’s inclination towards morningness or eveningness that is
typically assessed via self-assessment questionnaires (Terman et al., 2001;Horne
& Ostberg, 1976). Chronotype is divided into three categories: morning
type, evening type, and neither type; it reflects the time of day when numerous
psychophysiological variables peak (Jacopo Antonino Vitale
& Weydahl, 2017). NEED OF THE STUDY
·
This
research will add to our understanding of how whole-body vibration affects
neuromuscular performance such as Strength, Power, Speed, Agility, and Balance.
·
This
research will also help determine when whole body vibration is most useful and which
types of athletes (morning vs. evening) gain the most from WBV. As a result, it
is vital to know the effect of WBV on NMP in athletes of diverse chronotypes.
·
To
the best of my knowledge, no study has incorporated the acute effects of WBV at
two separate times based on chronotype. The
study’s novelty is the effectiveness of WBV on neuromuscular performance based
on different chronotypes and at two separate times.
RESEARCH
QUESTION
Is there any change in the NMP of a collegiate
male athlete depending on his Chronotype, after single-bout of whole-body
vibration applied at two separate times of the day? OBJECTIVES OF THE
STUDY
·
To find the acute effects
of WBV on neuromuscular performance in male collegiate athletes.
·
To implement the WBV as a
treatment for enhancing neuromuscular performance utilizing %Maximum voluntary
isometric contraction(%MVIC), Countermovement jump height, 20m single sprint,
T-test, and Y-balance test.
·
To find out when WBV is most useful (morning vs evening
time), as well as which types of athletes (morning vs. evening type) gain the
most from WBV.
HYPOTHESIS OF
THE STUDY
Null Hypothesis
There will be no statistically significant variations in Neuromuscular
performance amongst male collegiate athletes of different chronotypes who use
WBV at two distinct time periods.
Experimental hypothesis
There will be statistically
significant variations in Neuromuscular performance amongst male collegiate
athletes of different chronotypes who use WBV at two distinct time periods. SIGNIFICANCE OF
THE STUDY
This research will add to our understanding of whether
chronotype can affect the training and thus the performance of an athlete. It
will also help us to determine how whole-body vibration affects neuromuscular
performance such as Strength, Speed, Power, Agility, and balance. This research
will also help determine when whole body vibration is most useful and which
types of athletes (morning vs. evening) gain the most from WBV. As a result, it
is vital to know the effect of WBV on NMP in athletes of diverse chronotypes. PROTOCOL FOR
DATA COLLECTION:
Subjects will be recruited from different department
of Jamia Millia Islamia, M.A.K Pataudi sports complex and the surrounding
community based on inclusion and exclusion criteria, and they will be informed
about the study. The goal of the study and any potential dangers will be
addressed to the individual. They will be provided with informed consent after
being informed of their rights as study subjects. A
self-administered questionnaire will be used to choose subjects. A self-report
version of revised Morningness-Eveningness Questionnaire (MEQ-REV-SR) will be
used to divide people into three chronotypes: morning, intermediate, and
evening MEQ (Terman M et al., 2001;Horne & Ostberg, 1976).
The intermediate collegiate player will be excluded
from the study. Then the subjects will be separated into two
groups: Morning group and evening group on the basis of said
questionnaire. Subjects will receive WBV training either in the morning or in
the evening randomly using the chit method. Following 48 hours of wash-out
period the subject will be requested to the alternate session than what he has
already done. All identifying information on the permission form, as well
as demographic data, will be kept strictly confidential. PROCEDURE: ·
The subjects will be
selected on the basis of inclusion and exclusion criteria. They will be asked
to fill out the self-reported revised version of Morningness-Eveningness
personality questionnaire(MEQ-REV-SR) to assess the chronotype (Terman M et
al., 2001;Horne & Ostberg, 1976).
Subjects will also be screened to rule out any disease with the help of
physical activity readiness questionnaire. ·
Subjects will be given 1-day
rest from the game before the WBV training and testing to avoid the training
effects. Subjects will be instructed not to perform any form of exercise and
not to consume alcohol or coffee 24hr prior to the session, as it will affect
the training and testing. A familiarization session will be done for both groups. ·
Before WBV training, both
groups will complete a general warmup activity that includes 5 minutes of
jogging and active stretching of the major lower limb muscles (2 repetitions of
gluteus, quadriceps, hamstring, and calf stretching for 30 seconds). ·
Following a one-minute
rest, three trials of baseline measurement of the Y-balance test, %MVIC, CMJ
height, 20-m sprint time, and T-test time will be performed. ·
After 5 minutes, subjects
will be requested to pick up a chit depending on which they shall be subjected
to receive WBV, in the morning or evening. ·
During WBV training, subjects
will be required to stand on a WBV platform and be subjected to a vertical
sinusoidal mechanical WBV. For 5 minutes, a 30 Hz vibration frequency and a
peak-to-peak amplitude 2.5mm of WBV dosage will be delivered. Subjects will
receive a single bout of WBV training consisting of two 30-second squatting
exercise sets and two 30-second single-leg squatting exercise sets with
30-second rest intervals (Munshi et al., 2022). ·
After giving WBV
training, three trials of post-test measurement of the Y-balance, %MVIC through
EMG, CMJ height, 20m sprint time, and T-test will be performed, and the best of
the three will be recorded. ·
Subjects will be asked to
take a 48-hour break to lessen the effects of fatigue on test performance.
After 48 hours, the subjects will be swapped to receive intervention.
Then, again, after WBV training, three trials of post-test
measurement of Y-balance test, %MVIC CMJ height, 20m sprint time, and T-test
will be performed, and the best of the three will be recorded. Variables Independent variable
·
Whole body vibration Dependent variable
·
% MVIC (Maximum voluntary
isometric contraction)
·
Countermovement jump
height
·
20m sprint time
·
T-test
·
Y balance test |