Ability for tennis specific variables and agility for determining the Universal Tennis Ranking (UTR)

Authors: Jennifer A. Kurtz* (1), Jake Grazer (2), Bradley Alban (3), Mike Martino (4)

Corresponding Author:
Jennifer A. Kurtz, MS
120 Coventry Court
Fayetteville, GA 30215
Jennifer.kurtz06@gmail.com
404-509-3384

Jennifer Kurtz is a doctoral student at The University of Georgia studying exercise physiology. She is also an assistant strength and conditioning coach at Elite Performance Institute.

Jake Grazer is an Assistant Professor of Exercise Science at Georgia College & State University.

Bradley Alban is an Assistant Professor of Exercise Science at Georgia College & State University.

Mike Martino is an Professor of Exercise Science at Georgia College & State University.

Ability for tennis specific variables and agility for determining the Universal Tennis Ranking (UTR): A Review and Recommendations

ABSTRACT

Our purpose was to investigate tennis specific measures to predict a player’s Universal Tennis Ranking (UTR) value and to see what percentage of the variables most influence the ranking. Methods: 15 male and 14 female athletes volunteered to participate in this study. Each volunteer performed no more than 16 total serves or eight from the add and deuce side down the “T”, no more than 16 total forehands and backhands down-the-line, three spider tests, and two trials of footwork taps in 30 seconds. Only the top two hits were analyzed. Results: A multiple linear regression was calculated predicting a player’s UTR based on serve, forehand, backhand, agility, and footwork taps. The regression equation was significant (F (5,23) = 29.66, p<.05) with an R squared value of 0.866. Coefficient of variation (CV) and intra-class correlation coefficients (ICC) were calculated to assess reliability between player serve (r=0.902), forehand (r=0.843) and backhand velocity (r=0.858), agility (r=-0.817), and footwork (r=0.472). More noticeable was the significant predictive value of serve (r=0.902) and backhand velocity (r=0.858) to the player’s UTR. Conclusion: These results underline the important relationship between the player’s UTR and tennis-specific characteristics (serve and backhand velocity) as assessed by the player’s stroke velocity. The ability of training regimens to improve tennis-specific metrics would improve performance qualities and the player’s UTR.

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2019-12-04T14:27:14-06:00November 29th, 2019|Research, Sports Health & Fitness|Comments Off on Ability for tennis specific variables and agility for determining the Universal Tennis Ranking (UTR)

Concussions in Cheerleaders Reported from a Countywide Concussion Injury Surveillance System

Authors: Luis Gude, MD, Gillian Hotz, PHD

Corresponding Author:
Gillian Hotz Ph.D
Lois Pope LIFE Center – 1-40, (R-48)
1095 NW 14th Terrace, Miami, Florida 33136
ghotz@med.miami.edu
305-243-4004

Gillian A. Hotz, PhD is a research professor at the University of  Miami, Miller School of

Medicine and a nationally recognized behavioral neuroscientist and expert in pediatric and adult neurotrauma, concussion management, and neurorehabilitation. Dr. Hotz is the director of the KiDZ Neuroscience Center, WalkSafe, BikeSafe, and SkateSafe programs, and has been co-director of the Miller School of Medicine’s Concussion Program since 1995. She continues to assess and treat many athletes from Miami-Dade County public and private high schools, the University of Miami, and from other colleges and the community.

Concussions in Cheerleaders Reported from a Countywide Concussion Injury Surveillance System

ABSTRACT

The purpose of this study was to advocate for the acceptance of cheerleading as a sport so that its athletes are eligible for the same resources available to other sports, such as concussion education programs and injury surveillance systems. The subjects of this study were cheerleaders from Miami Dade County public high schools who sustained a sports related concussion (SRC) from August 2015 to June 2019, identified from the Miami Concussion Model Concussion Injury Surveillance System. The database is compiled from reports submitted by certified athletic trainers after a suspected concussion, from post-injury ImPACT tests, and from patients who present to the University of Miami Sports Concussion Clinic for evaluation. A total of 29 cheerleaders were identified. The 2018-19 academic year accounted for 45% of reported concussions, representing a large increase in number compared to previous years. This was observed after increased emphasis was placed on certified athletic trainers to report SRC in cheerleaders. On average cheerleaders with SRC were withheld from sport for 26.2 days, and 38% had prolonged recovery of >28 days. Cheerleaders perform complex athletic maneuvers that put them at risk of injury, particularly SRC. If considered a sport, cheerleading would be afforded the same benefits as other sports, including resources for better facilities, mandatory concussion education, ATC availability, baseline neurocognitive testing, and inclusion in injury surveillance systems. Increased knowledge of the long-term sequelae of concussions and repetitive head injuries has led to the development of concussion education programs and injury surveillance systems to protect athletes from these types of injuries. Although competitive cheerleading has been recognized as a sport, cheerleading as a whole has not, putting its athletes at risk as its participants are not included in these safety programs. 

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2019-10-29T08:27:26-05:00November 15th, 2019|Research, Sports Medicine|Comments Off on Concussions in Cheerleaders Reported from a Countywide Concussion Injury Surveillance System

Comparison of BMI-based equations and plethysmography for estimating body fat in female collegiate gymnasts

Authors: Jason C. Casey1, Robert L. Herron2, and Michael R. Esco3

1Department of Kinesiology, University of North Georgia, Oakwood, GA, USA
2Department of Sports Management, United States Sports Academy, Daphne, AL, USA
3Department of Kinesiology, The University of Alabama, Tuscaloosa, AL, USA

Corresponding Author:
Robert L. Herron, MA, CSCS*D, ACSM-RCEP
1 Academy Drive
Daphne Al, 36526
rherron@ussa.edu
251-626-3303

Jason C. Casey, PhD, CSCS*D, EP-C is an Assistant Professor of Kinesiology at the University of North Georgia in Oakwood, GA. His research interests focus on fatigue and recovery associated with exercise, athlete monitoring, and sport-related measurement issues.

Robert L. Herron, MA, CSCS*D, ACSM-RECP is currently faculty member and Sport Management doctoral student at the United States Sports Academy.  Robert’s areas of research interest include: measurement and evaluation in sport-related research and recovery from exercise stressors or sport injuries. 

Michael R. Esco, PhD, CSCS*D, FACSM is an associate professor of exercise physiology in the Department of Kinesiology at the University of Alabama. His research interests are in the areas of heart rate variability, body composition, athletic monitoring, and cardiovascular physiology.

Comparison of BMI-based equations and plethysmography for estimating body fat in female collegiate gymnasts

ABSTRACT

The purpose of this study was to assess the utility of using BMI-based equations (BEQ) to estimate body-fat percentage (BF%) in female-collegiate gymnasts.  As such, the agreement between BF% estimates with BEQ and air-displacement plethysmography (AP) were compared in twenty-two gymnasts (n = 22).  Body mass, height, and BF% were assessed via AP and BEQ [Jackson et al. (JBMI), Deurenberg et al. (DBMI), and Womersley & Durnin (WBMI)]. Results: The assessments produced the following estimated BF%: AP = 20.3 ± 3.6%; JBMI = 26.9 ± 3.9%; DBMI = 26.4 ± 2.2%; and WBMI = 27.9 ± 2.5%. BF% estimated via AP was significantly lower (p < 0.001) than each BEQ. Weak correlations were found between AP and BEQ (JBMI, r = 0.12; DBMI, r = 0.07; WBMI, r = 0.12). The limits of agreement (constant error ± 1.96 SD) for each BEQ compared to AP were: JBMI = 6.6 ­­± 9.5%; DBMI = 6.1 ­­± 7.8%; and WBMI = 7.6 ± 8.0%. These results suggest a wide range of individual differences existed between BEQ and AP. Furthermore, BEQ significantly overestimated BF% relative to AP in this gymnastics population.  Coaches and sport practitioners are in need of a quick, practical, inexpensive, and accurate method of body composition assessment. Based on this study, BEQ does not meet the needs of the practitioner when compared to AP. As a result, practitioners in the field need to consider other field methods of predicting BF% in collegiate female gymnasts.

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2019-10-28T14:00:06-05:00November 8th, 2019|Research, Sports Health & Fitness|Comments Off on Comparison of BMI-based equations and plethysmography for estimating body fat in female collegiate gymnasts

Evaluating the Two-Game Road Trip in College Sports: Does a Travel Partner Scheduling Approach Affect Team Competitiveness?

Authors:  Mark Mitchell, Samuel Wathen, and Robert Orwig

Corresponding Author:
Mark Mitchell, DBA
Professor of Marketing
Associate Dean, Wall College of Business
NCAA Faculty Athletics Representative (FAR)
Coastal Carolina University
P. O. Box 261954
Conway, SC  29528
mmitchel@coastal.edu
(843) 349-2392

Mark Mitchell, DBA is Professor of Marketing at Coastal Carolina University in Conway, SC.
Samuel Wathen, PhDis Professor of Management at Coastal Carolina University in Conway, SC.
Robert Orwig, DBA is Associate Professor of Management at the University of North Georgia in Dahlonega, GA.

Evaluating the Impact of Two-Game Road Trips in College Sports:  Does a Travel Partner Scheduling Approach Affect Team Competitiveness?

ABSTRACT

Some NCAA athletic conferences have implemented a geographic travel partner strategy when scheduling league games.  Teams are organized into two-team clusters.  A visiting team comes to the region and plays both opponents during one road trip before returning to campus.  Prior research reveals NBA teams tend to have a lower winning percentage when playing back-to-back games on back-to-back evenings.  This study examines the performance of college sports teams on two-game road trips to see if the NBA pattern exists in college sports.  Game results (and winning percentages) from the Sun Belt Conference for the 2016-17 season are evaluated over four sports (women’s soccer, women’s volleyball, women’s basketball, and men’s basketball).  Team performance in Game 2 was comparable to Game 1 in women’s soccer, women’s basketball, and men’s basketball. Game 2 performance was improved in women’s volleyball.   There was not a significant reduction in road team performance in Game 2 of two-game road trips when the quality of the opponent was introduced into the analysis of women’s soccer, women’s volleyball and women’s basketball.  However, men’s basketball teams tended to win more often during Game 1 rather than Game 2 when playing comparable opponents.  The travel partner scheduling model maximizes player rest, reduces travel time, and minimizes missed class time.  This study suggests its implementation does not impact team competitiveness, particularly during Game 2 as found in the NBA.  Conference personnel and university athletic administrators may take comfort that their drive to control costs and enhance the student-athlete experience is not impacting the competitiveness of their teams.

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2019-10-28T09:14:46-05:00November 1st, 2019|Research, Sports Management|Comments Off on Evaluating the Two-Game Road Trip in College Sports: Does a Travel Partner Scheduling Approach Affect Team Competitiveness?

Perceptions of Dry Needling for Performance & Recovery in NCAA Division I Athletes

Authors: Shemeika McCray & Joni M. Boyd, PhD. CSCS*D

Corresponding Author:
Joni M. Boyd, PhD, CSCS*D
216L West Center
Rock Hill, SC 29732
boydj@winthrop.edu
803-323-4936

Shemeika McCray is an undergraduate student in the Exercise Science Program at Winthrop University.  Dr. Joni Boyd is an Associate Professor of Exercise Science and Coaching at Winthrop University in Rock Hill, SC.

Perceptions of Dry Needling for Performance & Recovery in NCAA Division I Athletes

ABSTRACT

The aim of this study was to examine the perceptions of dry needling within NCAA Division I athletes for muscle performance and/or recovery.Seventy-seven NCAA Division I Athletes completed an 15-item online survey sent via e-mail, which included demographics, exposure to dry needling, and perceptions of effectiveness. Those that had no experience of dry needling were asked to rate their perceptions and reasoning for non-exposure. The results indicated that 66% (n=51) of participants did not have experience with dry needling, while 34% (n=26) did have experience with dry needling. Athletes that experienced dry needling reported that dry needling was effective and comfortable for efficient and speedy recovery. They also reported that they would recommend others to use this recovery treatment.  Those athletes with non-exposure to dry needling reported that they would rather use other treatments, concerned with pain or bruising from dry needling or was not sure it would work for recovery.  These results help to fill current gaps in research on dry needling.  Future research could compare treatment protocols for pain management and/or recovery effectiveness.

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2019-10-21T15:46:38-05:00October 21st, 2019|Research, Sports Medicine|Comments Off on Perceptions of Dry Needling for Performance & Recovery in NCAA Division I Athletes