Latest Articles

General health orientation based psychological motivations for masters athletes, a consideration of clustering utilizing t-distributed Stochastic Neighbor Embedding

August 21st, 2020|Research, Sports Health & Fitness|

Authors: Joe Walsh, Ian Timothy Heazlewood, Mark DeBeliso, Mike Climstein

Corresponding Author:
Dr. Mike Climstein (FASMF, FACSM, FAAESS)
Clinical Exercise Physiology
Southern Cross University
School of Health and Human Sciences
Gold Coast, Queensland, Australia
Michael.Climstein@scu.edu.au

Dr. Joe Walsh is with Sport Science Institute www.sportscienceinstitute.com

Ian Timothy Heazlewood is Associate Professor and Theme Leader Exercise and Sport Science in The School of Psychological and Clinical Sciences, Faculty of Engineering, Health, Science and the Environment, Charles Darwin University, Darwin, Northern Territory, Australia.

Mark DeBeliso is Professor, Department of Physical Education and Human Performance, Southern Utah University, Cedar City, USA

Dr. Mike Climstein (FASMF, FACSM, FAAESS) is with Clinical Exercise Physiology, Southern Cross University, School of Health and Human Sciences, Gold Coast, Queensland, Australia; Physical Activity, Lifestyle, Ageing and Wellbeing Faculty Research Group, University of Sydney, Sydney, NSW, Australia, 2006.

General health orientation based psychological motivations for masters athletes, a consideration of clustering utilizing t-distributed Stochastic Neighbor Embedding.

ABSTRACT

An exploration of clustering of general health orientation psychological motivations for participation in sport was conducted using t-distributed Stochastic Neighbor Embedding (t-SNE).  The aim of this research was to assess the suitability of applying t-SNE to creating two-dimensional scatter plots to visualise the relationship between different general health orientation motivators.  The data source used for this investigation was survey data gathered on World Masters Games competitors using the Motivations of Marathoners Scales (MOMS).  Application of t-SNE plots could assist in visually mapping general health orientation psychological constructs and gaining greater understanding of the underlying patterns in the MOMS tool.  Some clustering patterns were observed, with some items in the MOMS connected in a logical manner that complied with those originally proposed by the developers of the MOMS.  On tuning the t-SNE model hyperparameters, it became apparent that the t-SNE graphs were able to provide an appropriate representation of clustering with learning rates outside the ranges often recommended (at the time of writing).  As t-SNE is a relatively modern approach to visualizing high dimensional data, this was a finding worth reporting.  Two-dimensional scatter plots produced using t-SNE may assist in creating hypotheses about the relationships present between psychological constructs in such high-dimensional data.

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Predictive Modeling of 4th Down Conversion in Power 5 Conferences: Football Data Analytics

August 14th, 2020|Research, Sports Management, Sports Studies and Sports Psychology|

Authors: Joshua Blinkoff1, Michael Voeller1, Scottie Graham2 and Jeffrey Wilson3

1Barrett Honors College, Arizona State University Tempe, AZ
2Arizona State University, Sun Devils Athletics, Tempe, AZ
3Department of Economics, Arizona State University, Tempe, AZ

Corresponding Author:
Jeffrey R. Wilson, BA, MS, PhD
Department of Economics CPCOM 465D
Arizona State University/Tempe AZ 85287
jeffrey.wilson@asu.edu
480-213-4460

Dr. Jeffrey Wilson is a Professor of Statistics and the Faculty Athletics Representative to the PAC-12 and NCAA. His research includes binary logistic regression models and hierarchical data with random effects.

Predictive Modeling of 4th Down Conversion in Power 5 Conferences: Football Data Analytics

ABSTRACT

Purpose

In the sport of football, coaches are faced with critical decisions at different times in the game. Often the coach makes the decision based on a gut feeling or the advice of an assistant. However, if each decision can be supplemented with data, it is possible to increase the chances of success. This paper uses data (2015-18) from the games played between the 65 teams in Division I in the Power 5 conferences of the NCAA, to present a prediction model useful for 4th down determinations.

Methods

A predictive logistic regression model is used in the determination of 4th down options. In particular, a model based on a logistic regression model with random effects, capable of predicting the likelihood of converting on 4th down decision is presented. The adequacy of the model is estimated through calibration, discrimination, and bootstrap samples.

Results

Distance-to-go, pass or run, line of scrimmage, and the week of season are significant factors in predicting a successful 4th down with team as a random effect.

Conclusion

The paper demonstrates the use of analytics to increase the decision-making in football. It increases the precision in decision making by 36% in these data.

Applications in Sport

Teams can use the model to facilitate similar decisions in other parts of the game. This can also be used in the recruiting of players.

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Assessment of Disinfection Techniques for Decontaminating Athletic Mats

August 7th, 2020|Research, Sports Medicine|

Authors: Max Greisberg
maxgreisberg@gmail.com

Justin Greisberg, MD
Professor of Orthopaedic Surgery, Columbia University
Chief of Foot & Ankle Orthopaedics
Chief of Orthopaedic Trauma
622 W 168th St
PH 11th floor
New York, NY 10032
(212) 305-5604
Fax (212) 305-4024
Jkg2101@cumc.columbia.edu

The authors have no conflicts of interest to disclose.

No funding was received for this research.

Assessment of Disinfection Techniques for Decontaminating Athletic Mats

ABSTRACT

Skin infections are a hazard in close contact sports. Disinfection of wrestling mats is widely recommended to reduce the incidence of infection, but there is little to no evidence how best to clean the mats. In this study, microorganism levels from the wrestling mats of two schools were quantified to determine if disinfection reduces the bacterial load from the surface of the mats and in the seams between mat sections; and to determine if using a flat mop is more effective than a string mop. This study found that both techniques were effective in reducing the bacterial load of the mats. However, neither method was effective at reducing bacterial counts in the grooves between mat sections. There was a trend favoring the use of a flat mop over a traditional string mop, but the trend did not meet statistical significance. Future research may focus on whether widespread adoption of these techniques leads to a lower incidence of skin infection in athletes.

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Improvements in Acute Explosive Power without a Subsequent Decrease in the Range of Motion of Passive Hip-Flexion Muscles in Taekwondo Players Using Foam Rollers

July 31st, 2020|Research, Sports Health & Fitness|

Authors:  Ani AGOPYAN1*, Tugce KAHRAMAN2, Meral KUCUK YETGIN1 and Demet TEKIN3

Affiliations: 1 Department of Coaching Education, Faculty of Sport Sciences, Marmara University, Istanbul, Turkey; 2 National Education Foundation, Secondary School, Istanbul, Turkey; 3 Department of Physiotherapy and Rehabilitation, School of Health Sciences, Fenerbahce University, Istanbul, Turkey.

Corresponding Author:
Ani AGOPYAN, Assoc.Prof.
Department of Coaching Education, Faculty of Sport Sciences, Marmara University,
Marmara Universitesi Anadoluhisarı Yerleşkesi  Spor
Bilimleri Fakultesi  Goksu Mah. Cuma Yolu Cad. No:1PK.
34815 – Beykoz / Istanbul – TURKEY
+90 216 308 56 61; Mobile +90 532 714 17 51; Fax: +90 216 332 16 20
Email: aniagopyan@marmara.edu.tr

Ani Agopyan is an associate professor at Department of Coaching Education, Faculty of Sport Sciences in Marmara University, Istanbul-Turkey.

Improvements in Acute Explosive Power without a Subsequent Decrease in the Range of Motion of Passive Hip-Flexion Muscles in Taekwondo Players Using Foam Rollers

ABSTRACT

Background: Foam rolling (FR) has been developed as a popular intervention, however the acute effect of muscular and range of motion (ROM) function using a FR is unknown in young taekwondo players.

Objective: This study examined the acute effects of multiple (lower extremity and back part of the body) FR exercises on joint ROM and vertical jump performance in taekwondo athletes.

Methods: Nineteen (age: 13.21 ± 0.85 years) black-belt taekwondo athletes (nmale = 13; nfemale = 6), volunteered to participate of this study. Anthropometric measurements, Passive Straight-Leg Raise Test (PSLR) on each limb and vertical jump tests were performed on the first measurement day. In the second day, following a common warm-up model, participants performed FR exercises on five areas (erector spinae, iliotibial band, hamstrings, quadriceps, and calves) for three minutes (30 seconds/1 set for each area). The tests were administered to all participants again by swapping over on the third day. A Two-Way and Three-Way ANOVA Repeated Measures tests were performed.

Results: It was not observed any significant interaction between the three factors (time, side, or gender) and PSLR-ROM degrees of dominant and non-dominant legs (p>0.05). There were observed significant differences between the pre-and post-test measurements in the vertical jump height (+13.02%) and jump power (+5.23%) performance after FR exercises. Conclusion: Multiple FR exercises did not acute affect PSLR-ROM in taekwondo athletes. FR exercises may be effective within warm-up protocols and seems to be an efficient strategy to promote acute improvements in vertical jump performance in a short time period.

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The Effect of Resisted Sprinting on the Production of Horizontal Strength

July 24th, 2020|Sports Health & Fitness|

Authors: Jacqueline Serrano, Brian Serrano

Corresponding Author:
Dr. Brian Serrano
Director of HPI Sports Medicine
HPI Sports Medicine
28062 Forbes Road Unit D
Laguna Niguel, CA 92691
Brianserrano171@gmail.com
818-926-7269

Jacqueline Serrano is the Clinic Director of HPI Sports Medicine. She is a Chiropractor with a passion for Sports Medicine and Nutrigenomics. She uses her master’s degree in Molecular Pharmacology to practice functional medicine and seeks to help patients starting from their internal physiology.

Brian Serrano is the Director of Rehabilitation and Performance at HPI Sports Medicine and currently performs research in the field of Sports Medicine as it relates to overhead athletes. He is a Chiropractor and Athletic Trainer who seeks to bridge between research, rehabilitation, and performance.

The Effect of Resisted Sprinting on the Production of Horizontal Strength

ABSTRACT

Strength is a crucial aspect of sport performance and increasing strength is an important aspect of strength and conditioning programs for athletics. Strength and conditioning professionals are constantly innovating programming methods to increase attributes that accurately translate onto the field of play. PubMed, CINAHL, and EBSCO were searched for systematic reviews from 2000-2020 which used resisted sprinting, either pushing or pulling and their effect on horizontal strength for include in this literature review. Resisted sprinting results in a horizontal impulse that is sport specific to horizontal strength (p<.05). The most effective loading for resisted sprinting seems to be 10-30% of BW (p<0.05). Resisted sprinting in the form of sled pulling seems to be more sport specific because of its use of the upper extremities (CI 95%). Resisted sprinting seems to be a cost-efficient and technically effective form of increase horizontal strength, which can be incorporated into training and seems to have a superior effect to vertical based training modalities.

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