Ph.D., Sport Physiology, East Tennessee State University 2013 East Tennessee State University, Johnson City, TN Dissertation: Cell Free DNA as a Monitoring Tool in a Long-Term Athlete Monitoring Program
M.A., Exercise Physiology and Performance, East Tennessee State University 2009 East Tennessee State University, Johnson City, TN Thesis: Developing a Web Based Athlete Monitoring System
B.S., Exercise Science, East Tennessee State University 2004 East Tennessee State University, Johnson City, TN
Living in Johnson City
Current Work & Professional Responsibilities
2015-present, Assistant Professor at Armstrong State University
✓ Instruct a variety of graduate and undergraduate course
✓ Supervise graduate research projects
✓ Oversee sport science and strength and conditioning services for university athletics
2016-present, NSCA Georgia State Advisory Board Member
✓ Assist with and organize state clinics, outreach and other activities
2010-present, Owner and Founder of Sportably.com
✓ Co-founded Sportably.com in late 2010 as a free web based athlete monitoring system
✓ Specify and manage the implementation of web and mobile based tools used to develop and monitor athletes
Laboratory and field based skill and instrumentation experience
✓ Force plates (AMTI, Fitness Technologies, Rice Lake, Pasco)
✓ Zephyr (GPS, accelerometers, etc.)
✓ Catapult Systems (GPS, accelerometers, etc.)
✓ Individual and team pack heart rate monitoring systems (Polar)
✓ Electromyography (Noraxon)
✓ Venous blood collection (1000+ blood draws)
✓ Blood lactate analysis
✓ Lab techniques including centrifugation, pipetting, ELISA procedures and plate reader operation
✓ Maximal and submaximal VO2 testing
✓ Body composition (skinfolds, hydrostatic weighing, Bod Pod and bioelectrical impedance)
✓ Refractometer (hydration/urine specific gravity)
✓ Timing gates (Brower, Fusion Sport, and FreeLap)
✓ Vibration platforms (Power Plate) and custom made local vibration devices
✓ Switch or jump mats (Just Jump)
Software and computer skills
✓ Statistics packages – SPSS, Minitab and R
✓ Microsoft Office Suite (Word, Power Point, Excel, etc.)
✓ Adobe Creative Suite
✓ Content management systems – WordPress, Drupal and a variety of additional blogging and web platforms
✓ Programming – Python, Django, HTML, CSS
✓ Complimentary software to systems/devices listed in lab and field based skills
Additional Professional Experience
2013-2015, Assistant Professor at Meredith College
✓ Instruct a variety of undergraduate exercise and sport science courses
✓ Supervise undergraduate student research projects and internships
✓ Manage human performance lab and performance testing initiatives
✓ Academic advising for new and returning students
✓ Responsible for directing collaborative efforts with other departments and outside organizations/institutions
2013-2015, Sport Scientist and Strength and Conditioning Coach for the City of Raleigh SWAT Teams
My responsibilities to the Raleigh Police Department include but were not limited to,
✓ Responsible for the long-term development of 30 SWAT officers of the Raleigh, NC police department
✓ Educational lectures were provided addressing areas such as nutrient timing/sports nutrition, exercise technique and program design
✓ Development and implementation of a periodized program aimed at enhancing the underlying biomotor abilities necessary to enhance job performance
✓ A thorough battery of anthropometric and performance testing is performed quarterly
✓ Data return presentations are given to all SWAT officers and administrative staff after each testing session/data collection
2013-2015, Sport Science Consultant with North Carolina State University (NSCU) Strength and Conditioning
I have provided the following services to the Strength and Conditioning staff at NSCU.
✓ Design and implement a custom battery of anthropometric and performance tests for several sports
✓ Provide data return presentations to sport coaches, strength and conditioning staff and sports medicine
✓ Data analysis and interpretation
2010-2013, Sport Scientist and Doctoral Fellow for ETSU’s Center of Excellence for Sport Science and Coach Education as well as the Olympic Training Center for USA Weightlifting
My responsibilities in this position included but were not limited to,
✓ Long term athlete monitoring and development of resident Olympic Weightlifters of the Olympic Training Center for USA Weightlifting and NCAA Division I athletes in a variety of sports
✓ Regular lab based performance and other physiological testing Injury tracking
✓ On field monitoring and quantification of on field and weightroom workloads
✓ Development and implementation of periodized strength and conditioning programs
✓ Provision of test result and other feedback to coaches and sport medicine staff
✓ Administered and designed sportscienceed.com, the official website of ETSU’s Center of Excellence for Sport Science and Coach Education
✓ Assisted in the planning and organization of several conferences, namely the annual Coaches and Sport Science College held at ETSU
2006-2010, Exercise Physiologist at ObesityHelp, Inc.
✓ Project leader for numerous web based applications aimed at tracking nutrition, exercise and health variables
✓ Speaker at dozens ObesityHelp conferences throughout the nation
✓ Wrote and created health and fitness content for ObesityHelp.com which generated 13,000,000+ pageviews a month
✓ Wrote a regular column for OH Magazine, a bi-monthly, nationally circulated magazine from 2006-2009
✓ Coordinated project development with bariatric surgeons and allied health professionals around the nation producing support networks for the morbidly obese
✓ Work with Content Management Systems on a daily basis to manage and create web pages throughout ObesityHelp.com
2004-2006, 11B/Infantryman with the United States Army
✓ Stationed in South Korea with the 102nd Military Intelligence Battalion as direct combat support for the ROK
✓ Assisted the 2-87th Infantry Battalion deploy to Afghanistan
✓ Continued to develop leadership skills through training and assisting lower ranking soldiers
2003-2004, Manager at Johnson City Health and Fitness Center, Johnson City, TN
✓ Managed and promoted the Personal Fitness Success Program
✓ Developed and supervised comprehensive strength and conditioning programs for a variety of populations
✓ Responsible for screening, hiring, and managing Personal Fitness Success personal trainers
✓ Prepared and presented general wellness and sport specific seminars
✓ Administered health screenings as well as performing body composition and exercise testing
✓ Ordered and purchased new equipment for facility
✓ Increased revenues and provided clients with highly qualified and educated personal trainers
2001-2003, Store Manager at General Nutrition Centers, Johnson City, TN
✓ Supervised day-to-day retail operations while advancing GNC corporate objectives
✓ Attained a thorough working knowledge of the supplement industry and products available
✓ Responsible for interviewing, hiring and training sales clerks
✓ Generated customer loyalty and consistently surpassed sales goals
✓ Managed in store financial records and promotional campaigns
✓ Controlled the ordering of all store product stock
1998-2001, Critical Care Technician at Johnson City Medical Center, Johnson City, TN
✓ Provided acute and chronic care throughout intensive care units and level one trauma center
✓ Performed 1000+ venous blood draws and electrocardiograms
✓ Offered hands on support to other medical staff during medical emergencies such as cardiac arrests and traumas
✓ Participated and assisted in emergency care through Wings Air Rescue
Gentles, J. A., Coniglio, C. L., Mahnken, M. T., Morgan, J. M., Besemer, M. M., MacDonald, C. J. (2018). The demands of a single elimination collegiate tennis tournament. Sports Performance Science Reports, Jan (16), 1. Download PDF | ResearchGate | Publisher’s website
Hornsby, W.G., Gentles, J. A., MacDonald, C.J., Mizuguchi, S., Ramsey, M.W., Stone, M.H. (2017). Maximum Strength, Rate of Force Development, Jump Height, and Peak Power Alterations in Weightlifters across Five Months of Training. Sports, 5(4), 78. Download PDF | ResearchGate | DOI
Gentles, J. A., Hornsby, W. G., Gray, H. S., Miller, J. A., Dotterweich, A. R., Stuart, C. A., & Stone, M. H. (2015). Changes in cell free DNA during a college soccer season. Journal of Trainology, 4(1), 25-31. Download PDF | ResearchGate | DOI
Oral and Poster Presentations
Wearable Tech – More than just player movement
Oral Presentation at the 2017 Collegiate Strength & Conditioning Coaches Association Annual Conference, Orlando, FL. (one of two speakers)
No Time to Test? So Test While You Train!
Oral Presentation at the 2017 National Strength and Conditioning Association’s Tactical Strength and Conditioning Annual Training, Orlando, FL. (one of two speakers)
The Relationship of Body Composition to Countermovement Vertical Jump Characteristics Across Loaded Conditions
Poster Presentation at 2016 ETSU Coaches and Sport Science College, Johnson City, TN.
The Demands of a Single Elimination College Tennis Tournament
Poster Presentation at the 2016 Georgia State NSCA Clinic, Savannah, GA. This post was also presented at the 2016 ETSU Coaches and Sport Science College, Johnson City, TN.
Off-season Training – Implementation and Challenges
Oral Presentation at the 2016 Georgia State NSCA Clinic, Savannah, GA.
The Periodization Debate – Which periodization model is right for the tactical setting
Oral Presentation at the 2016 National Strength and Conditioning Association’s Tactical Strength and Conditioning Annual Training, San Diego, CA (one of two speakers)
Long-term Monitoring & Development of SWAT Officers
Oral Presentation at the 2015 National Strength and Conditioning Association’s Tactical Strength and Conditioning Annual Training, Orlando, FL. (one of two speakers)
Physiological Point of View for Injury Prevention & Return to Play
Oral Presentation at the 2014 Friesen Physio Fitness Summit, Raleigh, NC.
Differences in sEMG Between Normal Squats and Accentuated Eccentric Loaded Squats in Competitive Collegiate Weightlifters
Oral Presentation at the 2014 International Society of Biomechanics in Sports Conference, Johnson City, TN.
Changes in Cell Free DNA Concentrations During the Course of a Collegiate Soccer Season
Poster Presentation at the 2014 Southeast American College of Sports Medicine Annual Meeting, Greenville, SC. (first author)
A Comprehensive Framework for Monitoring the Training Process
Oral Presentation at the 2014 National Strength and Conditioning Association Coaches Conference, Indianapolis, IN. (one of two speakers)
Long-term athlete monitoring in High School
Oral Presentation at the 2013 North Carolina Alliance for Athletics, Health, Physical Education, Recreation and Dance Annual Meeting, Raleigh, NC. (first author and speaker)
Impact of Baseline NetPVGRF/kg Ability Upon PAP of CMVJ’S During 12 Different Treatments
Poster Presentation at the 2013 American College of Sports Medicine Annual Meeting, Indianapolis, IN.
Long Term Interdisciplinary Athlete Development and Monitoring Programs
Symposium Presentation at the 2013 Southeast American College of Sports Medicine Annual Meeting, Greenville, SC. (one of two speakers)
Volume Load and Training Intensity With and Without Exercise Displacement
Poster Presentation at the 2013 Southeast American College of Sports Medicine Annual Meeting, Greeneville, SC.
Game Performance of NCAA Division I Teams With & Without Integrated Sport Science Support
Poster Presentation at the 2012 ETSU Coaches and Sport Science College, Johnson City, TN.
Analyses of Volume Load and Training Intensity in Competitive Weightlifters Across 5 Months of Training
Poster Presentation at the 2012 ETSU Coaches and Sport Science College, Johnson City, TN.
Reducing Injuries is NOT Enough – It Also Helps to Win
Poster Presentation at the 2012 American College of Sports Medicine Annual Meeting, San Francisco, CA. (first author)
Changes in Measures of Power in NCAA Division I Female Soccer Athletes Through Competitive Seasons
Oral Presentation at the 2012 American College of Sports Medicine Annual Meeting, San Francisco, CA.
An Interdisciplinary Approach to Injury Prevention and Performance Enhancement in NCAA Division I Baseball
Oral Presentation at the 2012 Southeast American College of Sports Medicine Annual Meeting, Jacksonville, FL. (first author and speaker)
Comparisons Between Body Composition and Power Production During Jumps in Collegiate Female Athletes
Poster Presentation at the 2011 National Strength and Conditioning Association National Conference, Las Vegas, NV.
Changes in Measures of Power in NCAA Division I Female Soccer Athletes through Competitive Seasons
Poster Presentation at the 2011 Annual ETSU Coaches College, Johnson City, TN
Monitoring training loads with a web based athlete monitoring system
Practical Demonstration/Oral Presentation at the 2011 ETSU Coaches and Sport Science College, Johnson City, TN. (first author and speaker)
Injury Rates Among Division I Baseball Players With and Without SPEC Program Guidance
Poster Presentation at the 2011 Appalachian Student Research Forum, Johnson City, TN. (first author and speaker)
Injury Rates Among Division I Baseball Players With and Without SPEC Program Guidance
Poster Presentation at the 2010 ETSU Coaches and Sport Science College, Johnson City, TN. (first author and speaker)
Daily athlete monitoring with web and mobile applications
Practical Demonstration/Oral Presentation at the 2010 ETSU Coaches and Sport Science College, Johnson City, TN. (first author and speaker)
Relationships Between Jump Characteristics of Collegiate Female Athletes Competing in Different Disciplines
Poster Presentation at the 2010 ETSU Coaches and Sport Science College, Johnson City, TN.
Teaching Experience and Course Development
Courses Taught at Armstrong State University
Program Design and Advanced Training Techniques (graduate)
An advanced course examining principles of program design, current concepts regarding periodized training and the physiological adaptations in response to power, plyometrics, speed and agility training. Practical mastery as well as theoretical understanding will be required.
Theory and Methodology of Strength and Conditioning (graduate)
The efficacy of methods and models of sports training in activities requiring intensive strength and conditioning programs.
Performance Evaluation and Exercise Testing (graduate)
Study of laboratory and field-based techniques, using biomedical instrumentation, for assessment of physiological responses. Effective appraisal and exercise prescription in various populations is emphasized.
Exercise Physiology (graduate and undergraduate)
Acute and chronic physiological and biochemical responses of the human body to exercise.
Physical Activity in Disease Prevention/Treatment (undergraduate and graduate)
Effects of physical activity on health enhancement and maintenance. Bioenergetics, physical assessment methods, equipment, and exercise prescription.
Healthy Weight Management & Body Composition (undergraduate and graduate)
A survey of research and applications for methods of improving body composition with a focus on optimal health and physical performance. Students will investigate effective strategies for long-term changes in body fatness and lean body mass
Thesis/Professional Project in Sports Medicine I (graduate)
Planning and conducting an original research project as a group project or an individual thesis, supervised by the student’s thesis committee or project advisor.
Thesis/Professional Project in Sports Medicine II (graduate)
Completing and presenting an original research project as a group project or an individual thesis, supervised by the student’s thesis committee or project advisor.
Evaluation and Prescription in Exercise & Sport
Measurement of human performance and laboratory techniques in physical activity and sport
Courses Taught at Meredith College
A study of the neuromuscular and mechanical principles of movement. This course examines the way bones and muscles work in all types of dance and sport related activities. Content also includes understanding muscular imbalances, physiological support systems, body types, movement behavior, and movement efﬁciency.
Exercise Physiology and Lab
A course designed to examine the body’s response and adaptation to exercise and sport and the implication of these changes for physical education and ﬁtness programs. The course includes muscular adaptation, energy systems, and the effects of environmental factors, diet, gender, and the methods of physical training.
This course will provide an introduction to the physiological basis of health and ﬁtness assessments, methods of assessment, and exercise prescription plans required to bring about changes in the health and ﬁtness of both healthy individuals as well as those requiring accommodation for special needs or medical conditions. Course content will also include the business management aspects of a career in ﬁtness program development.
Fitness and Wellness
A course designed to develop understanding in the conceptual knowledge of health and ﬁtness in the development and maintenance of human wellness. The course will allow each student to plan a program of physical activity that meets her unique needs and interests. The ultimate goal is to help students plan for a lifetime of wellness including physical ﬁtness and healthy nutrition.
The purpose of this course is to provide students with information about exercise testing and prescription. Students will develop the skills and technical procedures necessary to conduct exercise and sport fitness testing using a variety of technologies. Hands on experience will be available for a variety of different fitness and health related tests.
Exercise & Sport Bioenergetics
This independent study course is designed to provide students with information explaining how to identify the energy system used during exercise and sporting events as well as the resulting cell signaling mechanisms which cause adaptation. Students will also discover how to enhance athletic and sport performance with proper nutrient timing strategies which leverage the systemic and cellular environments created via exercise.
An introduction to strength training with emphasis on the basic principles of exercise, and safe and effective training techniques.
A course designed to provide students with opportunities to gain knowledge and skills necessary for safe and effective strength training and cardiovascular conditioning. Students will have access to strength machines and free weights, as well as cardiovascular equipment such as stationary bikes, climbers, treadmills and elliptical trainers.
Practicum: Exercise and Sport Science
A supervised ﬁeld experience in a ﬁtness, sport, or wellness-related agency.
Courses Taught at East Tennessee State University
Development of web based courses for online Master’s Degree in Sport Performance
This required the development of video lectures, podcasts and other online materials. This also required integrating course materials with ETSU’s web based course delivery platform.
Exercise Management for Persons with Chronic Diseases and Disabilities
This course examined chronic diseases and disabilities that occur in many individuals. It is oriented toward understanding the disease, the effects exercise may have on the disease, and modifications to general exercise programs.
Exercise Physiology II – Cardiovascular and Pulmonary Physiology
This course presents a foundation for understanding the underlying mechanisms behind the physiological and biochemical acute responses to exercise and also discusses the long-term physiological and biochemical adaptations to exercise.
Cardiovascular Exercise Testing and Electrocardiography
This course provided the student with the background needed to function as a clinical exercise specialist. Additionally, the course provided the background to allow students to obtain exercise specialist or other clinical specialty certifications, offered by the American College of Sports Medicine and other internationally recognized organizations.
Exercise Fitness Testing
This course provided knowledge in exercise testing and prescription for healthy populations. Students were provided with instruction and hands-on experience with underwater weighing, VO2 max testing, treadmill, ergometer cycle, and other laboratory tests and equipment.
Scientific Basis of Human Performance
This course is designed to provide a student with an understanding of the scientific principles of human performance.
Fitness for Life
This course presented specific activities, workout sessions, and health/fitness assessments through lectures and demonstrations.