The Effect of Dynamic Stretching on 1RM Deadlift: A Research Proposal

This research proposal investigates the impact of dynamic stretching on the 1RM deadlift performance of weightlifters. The study aims to evaluate how dynamic stretching affects 1RM deadlift measurements, focusing on variables such as knee flexion, arm flexion, and trunk flexion. The methodology involves a comparative analysis of participants who incorporate dynamic stretching before deadlifting versus those who do not. Data collection includes quantitative measures from 30 highly trained male weightlifters. The research will employ independent t-tests for statistical analysis to identify significant differences between the groups. Ethical considerations are addressed, including informed consent and adherence to safety protocols. The project timeline spans several weeks, encompassing literature review, data collection, analysis, and report writing. The conclusion suggests that dynamic stretching can modify exercise procedures, potentially improving muscle flexibility and enhancing deadlifting performance. This study highlights the importance of warm-up routines and dynamic stretching in optimizing weightlifting outcomes.

Running head: EFFECT OF DYNAMIC STRETCHING IN 1RM DEADLIFT
RESEARCH PROPOSAL ON EFFECT OF DYNAMIC STRETCHING IN 1RM DEADLIFT
Name of Student:
Name of University:
Author’s Note:

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EFFECT OF DYNAMIC STRETCHING IN 1RM DEADLIFT
Executive summary
The aim of the project is to evaluate how dynamic stretching in people can affect the
measurement of 1RM deadlift. The project here highlights the importance of dynamic stretching
in doing deadlifting. The project has taken the effective participation of sample and indulged
them doing the dynamic stretching. Statistical analysis is done in order to evaluate the
measurement of three variable arm flexion, trunk flexion, knee flexion. The test of variable will
help to come in better conclusion. The proposal is concluded by reflecting the importance of
dynamic stretching.

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EFFECT OF DYNAMIC STRETCHING IN 1RM DEADLIFT
Table of Contents
Introduction......................................................................................................................................3
Background..................................................................................................................................3
Aim of the research......................................................................................................................4
Research objective.......................................................................................................................4
Significance of research...............................................................................................................4
Hypothesis...................................................................................................................................4
Methodology....................................................................................................................................5
Type of data and collection..........................................................................................................5
Statistical analysis........................................................................................................................6
Ethical consideration.......................................................................................................................6
Timeline of project..........................................................................................................................7
Conclusion.......................................................................................................................................8
Reference.........................................................................................................................................9

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EFFECT OF DYNAMIC STRETCHING IN 1RM DEADLIFT
Introduction
The aim of the project is to evaluate how dynamic stretching in people can affect the
measurement of 1RM deadlift. Dynamic stretching is known to increase the extensibility of
muscle which gives proper toning of the body. The project includes selection of participants who
are trained in weight-lifting. A comparative statistical analysis is done to compare the variable
taken which included knee flexion, arm flexion, and trunk flexion.
Background
Energy and power is the critical characteristic of any person doing any exercise, whose
optimization can be enhanced during training and through warm-up (Emmet, 2017). Warm-up is
submaximal aerobic action that also involves stretching and sports activity (Barnes et al., 2015).
Research says that including maximal muscular action improves the neuromuscular activity of
the person (Cadore et al., 2014). There is two types of stretching in warm-up static stretching and
dynamic stretching. Static stretching is the most common one; it involves the function of
maintaining the placing of the muscle in lengthen position (Haddad et al., 2014). It is known to
increase flexibility of body and reduce any risk of injury. However, it also has many limiting
features that may reduce the performance of the sports person. It causes overstretching of the
muscle (Adelsberger& Tröster, 2014). It has adverse effect on muscle strength and vertical
jumping. Dynamic stretching, however, is comprised of that movement of the body that involves
range of motion of limb by contraction of muscle, which includes the relaxation and elongation
of antagonist muscle due to mutual inhibition (Chatzopoulos et al., 2014). Dynamic stretching is
the common type of warm-up routine that every athletic performer does. Studies have shown that
dynamic stretching is known to increase leg power, vertical jumping or deadlift (Paradisis et al.,
2014). It is the most common activity that every sportsperson performs before doing any

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EFFECT OF DYNAMIC STRETCHING IN 1RM DEADLIFT
exercise. The present study intends to measure the effect of dynamic stretching in 1RM deadlift.
Research says that 1RM test is generally performed to measure the isotonic strength of muscle. It
takes into account the maximum weight a person can lift, in one repetition of the exercise
(Loturcoe et al., 2017). The study here focusses on measurement of 1RM deadlift and how it is
affected by involvement of dynamic stretching.
Aim of the research
The major aim of the study is to evaluate the effect of dynamic stretching and how it
plays role in measurement of 1RM deadlift in person.
Research objective
The major objectives of the study are:
 To determine the effect of dynamic stretching on person performing exercise.
 To understand its effect with respect to measurement of 1rm deadlift.
 To determine the consequences involved due to dynamic stretching in person doing 1RM
deadlift.
Significance of research
The major significance of the study is, it will help to make person understand the
importance of warming-up, dynamic stretching in doing 1RM deadlift. It will help the
sportspersons to improve their performance by modifying the type of dynamic stretching.

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EFFECT OF DYNAMIC STRETCHING IN 1RM DEADLIFT
Hypothesis
In respect to the aim of the study following hypotheses has been put forward:
1. Dynamic stretching is the important tool to increase the leg extension power in weight
lifter.
In support of the hypothesis, Mizuno and Umemura (2014) has highlighted the importance of
dynamic stretching through examining its effect on muscle through ultrasonography. He
mentioned in his study that dynamic stretching has increased the flexibility of the tissue of the
body that tends to improve the performance of weight lifter.
Methodology
The study on dynamic stretching will attempt to provide practical application through
observing the consequence of dynamic stretching on person doing 1RM deadlift. The method
involves here will involve the technique of deadlifting, and dynamic stretching. The study
employs the construction of repeated measure to examine the effect of dynamic stretching during
1RM deadlift. To evaluate the measurement of 1RM deadlift, the significant variables are knee
flexion, trunk flexion and arms flexion (Teng, & Powers, 2014; Kienbacher et al., 2015; Massaad
et al., 2014). Technique of deadlift has been described by Eather, Morgan, and Lubans (2016)
was employed in order to study the effect of dynamic stretching.
In order to examine the cause, knee flexion will be analyzed in standing position when
thigh is parallel to the ground. Trunk flexion will be analyzed as because it lies close to vertical
of hip. Arm flexion is examined to know the power and effect of stretching.
To proceed with the research, following equipment would be required, free weights like
dumbbells and barbells, and gym equipments.

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EFFECT OF DYNAMIC STRETCHING IN 1RM DEADLIFT
Type of data and collection
The data collected is of quantitative in nature, that will include the total number of
participant involved in the study will be 30 highly trained male weight lifter. The participants
were trained athlete, none of them were reported with complain of consumption of any steroid.
All the study will be conducted in indoor facility of training room.
In order to proceed with the research, out of 30, 15 will be asked to do deadlifting
without incorporation of dynamic stretching and rest in 15 prior dynamic stretching and warm-up
will be included before doing deadlifting. Total number 3 session will be done at the time
interval of 5 hours and 1RM deadlift measurement will be taken. For participant doing dynamic
stretching, resistance training protocol will be followed each day before starting the exercise.
Each of the RM tests will follow the same protocol.
Comparative analysis of both type of participants that included dynamic stretching and
that which did not involved, with the help of statistical examination that will consist of the
variable taken as the mean of study will be done.
Statistical analysis
Independent t-test will be included as the mean of statistical examination (Lakens, 2017).
This test will be used to compare significant difference in two groups of participants (doing
dynamic stretching and without doing dynamic stretching) value for ultimate angle for every
particular variable, the displacement of these variable and its rate of change of variable in every
participant. The variable included is knee flexion, trunk flexion, and arm flexion. Priori alpha
level of 0.05 value is used to maintain the statistical analysis (Delacre, Lakens & Leys, 2017).

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EFFECT OF DYNAMIC STRETCHING IN 1RM DEADLIFT
Ethical consideration
To proceed with the research basis ethical consideration is maintained. The risk and
benefit associated with the study will be explained to the participant prior to the investigation.
Each of the participants will be asked to sign a consent file that will be approved by the
university board and university ethics committee. The participant included in the study have
eight months of training experience of dynamic stretching, and all of them were acquainted with
the deadlifting exercise. It will make sure that all the of them are free from any leg, arm, and
internal body injury. The subjects were instructed to refrain from any physical activity for the
period of 24hrs before getting into the dynamic stretching test. All the subject should be given
same diet and obstruct them using any caffeine before the study. They will be given full
explanation of the study design, and they approve this, then only study will be proceeded.
Timeline of the project
Research
Activities
0-2 weeks 3-5 weeks 5-7weeks 7-8 weeks 8-10
weeks
Choosing the
topic

Literature review 
Data collection 
Data analysis 
Interpretation of
result
 

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EFFECT OF DYNAMIC STRETCHING IN 1RM DEADLIFT
Preparation for
publishing
  
Submission of
final work

(Figure: Gantt Chart)
Source: (Created by Author)
Conclusion
Lastly, from the discussion, it can be concluded that study on dynamic stretching will
help to modify the procedure of exercise among the sports person as well as other people. This
will help to increase the flexibility of muscle thus, promote deadlifting activity in much easy way
than without incorporating dynamic stretching will do.

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EFFECT OF DYNAMIC STRETCHING IN 1RM DEADLIFT
Reference
Adelsberger, R., & Tröster, G. (2014). Effects of stretching and warm-up routines on stability
and balance during weight-lifting: a pilot investigation. BMC research notes, 7(1), 938.
Barnes, K. R., Hopkins, W. G., McGuigan, M. R., & Kilding, A. E. (2015). Warm-up with a
weighted vest improves running performance via leg stiffness and running
economy. Journal of science and medicine in sport, 18(1), 103-108.
Cadore, E. L., González‐Izal, M., Pallarés, J. G., Rodriguez‐Falces, J., Häkkinen, K., Kraemer,
W. J., ... & Izquierdo, M. (2014). Muscle conduction velocity, strength, neural activity,
and morphological changes after eccentric and concentric training. Scandinavian journal
of medicine & science in sports, 24(5), e343-e352.
Chatzopoulos, D., Galazoulas, C., Patikas, D., & Kotzamanidis, C. (2014). Acute effects of static
and dynamic stretching on balance, agility, reaction time and movement time. Journal of
sports science & medicine, 13(2), 403.
Delacre, M., Lakens, D., & Leys, C. (2017). Why psychologists should by default use Welch’s t-
test instead of Student’s t-test. International Review of Social Psychology, 30(1).
Eather, N., Morgan, P. J., & Lubans, D. R. (2016). Improving health-related fitness in
adolescents: the CrossFit Teens™ randomised controlled trial. Journal of sports sciences,
34(3), 209-223.
Emmet, D. (2017). The concept of power. In Paradigms of Political Power (pp. 78-104).
Routledge.

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EFFECT OF DYNAMIC STRETCHING IN 1RM DEADLIFT
Haddad, M., Dridi, A., Chtara, M., Chaouachi, A., Wong, D. P., Behm, D., & Chamari, K.
(2014). Static stretching can impair explosive performance for at least 24 hours. The
Journal of Strength & Conditioning Research, 28(1), 140-146.
Kienbacher, T., Paul, B., Habenicht, R., Starek, C., Wolf, M., Kollmitzer, J., ... & Ebenbichler,
G. (2015). Age and gender related neuromuscular changes in trunk flexion-
extension. Journal of neuroengineering and rehabilitation, 12(1), 3.
Lakens, D. (2017). Equivalence tests: a practical primer for t tests, correlations, and meta-
analyses. Social Psychological and Personality Science, 8(4), 355-362.
Mizuno, T., & Umemura, Y. (2016). Dynamic stretching does not change the stiffness of the
muscle-tendon unit. International journal of sports medicine, 37(13), 1044-1050.
Loturco, I., Kobal, R., Moraes, J. E., Kitamura, K., Cal Abad, C. C., Pereira, L. A., & Nakamura,
F. Y. (2017). Predicting the maximum dynamic strength in bench press: the high
precision of the bar velocity approach. Journal of strength and conditioning
research, 31(4), 1127-1131.
Massaad, F., Levin, O., Meyns, P., Drijkoningen, D., Swinnen, S. P., & Duysens, J. (2014). Arm
sway holds sway: locomotor-like modulation of leg reflexes when arms swing in
alternation. Neuroscience, 258, 34-46.
Paradisis, G. P., Pappas, P. T., Theodorou, A. S., Zacharogiannis, E. G., Skordilis, E. K., &
Smirniotou, A. S. (2014). Effects of static and dynamic stretching on sprint and jump
performance in boys and girls. The Journal of Strength & Conditioning Research, 28(1),
154-160.

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Teng, H. L., & Powers, C. M. (2014). Sagittal plane trunk posture influences patellofemoral joint
stress during running. journal of orthopaedic & sports physical therapy, 44(10), 785-792.