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Austin Graybeal

Dr. Austin Graybeal

Assistant Professor


Dr. Graybeal is an Assistant Professor in the School of Kinesiology & Nutrition at the University of Southern Mississippi. Raised in North Texas, Dr. Graybeal earned a BS in Kinesiology with a concentration in Exercise and Sports Science in 2016 and an MS in Kinesiology with an emphasis in Human Performance in 2018, both from Texas Tech University. Returning home, Dr. Graybeal completed his Ph.D. in Kinesiology and Health Sciences with a concentration in Nutrition, at Texas Christian University in 2021. Dr. Graybeal's research focuses on the accuracy of body composition assessment techniques with a focus on artificial intelligence and the utility of popular dietary interventions in achieving optimal body composition and cardiometabolic health. Specifically, Dr. Graybeal is interested in the effects of hyperketonemia independent of the ketogenic diet.

  • PHD - Texas Christian University (2021)
  • MS - Texas Tech University (2018)

KIN 304: Nutrition and Performance
KIN 402L: Exercise Physiology II Lab
KIN 301: Kinesiology
KIN 301L: Kinesiology Lab
KIN 105: Concepts in Physical Fitness

  • Time-restricted feeding plus resistance training in active females: a randomized trial, AMERICAN JOURNAL OF CLINICAL NUTRITION, 2019, 10.1093/ajcn/nqz126
  • Body Composition Assessment in Male and Female Bodybuilders: A 4-Compartment Model Comparison of Dual-Energy X-Ray Absorptiometry and Impedance-Based Devices, JOURNAL OF STRENGTH AND CONDITIONING RESEARCH, 2020, 10.1519/JSC.0000000000002831
  • Age drives the differences in dietary supplement use in endurance athletes: A cross-sectional analysis of cyclists, runners, and triathletes, Journal of Dietary Supplements, 2022,
  • Improved physiological markers of omega-3 status and compliance with omega-3 supplementation in Division I Track & Field and Cross-country athletes: a randomized controlled crossover trial, International Journal of Sport Nutrition and Exercise Metabolism, 2022,
  • Manipulation of fatty acid composition in a high-fat meal does not result in differential alterations in appetite or food intake in normal weight females: A single-blind randomized crossover study, APPETITE, 2021, 10.1016/j.appet.2020.105085
  • Body composition, not dietary fatty acid composition, explains metabolic responses following a high-fat meal in premenopausal normal-weight women: a single-blind, randomised, crossover study, BRITISH JOURNAL OF NUTRITION, 2020, 10.1017/S0007114520004419
  • Perceptions of appetite do not match hormonal measures of appetite in trained competitive cyclists and triathletes following a ketogenic diet compared to a high-carbohydrate or habitual diet: A randomized crossover trial x2729;, NUTRITION RESEARCH, 2021, 10.1016/j.nutres.2021.07.008
  • The Relationship Between Dietary Intake and Sleep Quality in Endurance Athletes, Frontiers in Sport and Active Living, 2022,
  • Caffeine Supplementation Strategies Among Endurance Athletes, International Journal of Exercise Science, 2021
  • Changes in body composition and neuromuscular performance through preparation, 2 competitions, and a recovery period in an experienced female physique athlete, Journal of strength and conditioning research, 2019, 10.1519/JSC.0000000000002758
  • American College of Sports Medicine
  • National Strength and Conditioning Association
  • The Obesity Society
  • English (Native or Bilingual)

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Contact Me

Joseph Greene Hall (JGH) 351



Areas of Expertise

Body Composition Assessment Techniques, Hyperketonemia, Influence of Diet and Body Composition on Appetite, Obesity