Mitchel A. Magrini, PhD

Department

Exercise Science and Pre-Health Professions

Position

Associate Professor

Publications

• Isokinetics and exercise science
  Murphy Blake R, Magrini Mitchel A, Hammond Kelley G, Siedlik Jacob A, Krywe April, Stoffel Devon, Hoffman Rashelle M, Agreement between common linear position transducers measuring mean and peak velocities during a belt squat 2025
• Isokinetics and exercise science
  Murphy Blake, Magrini Mitchel, Siedlik Jacob, Krywe April, Stoffel Devon, Hammond Kelley, Hoffman Rashelle, Agreement between common linear position transducers measuring mean and peak velocities during a belt squat, p. - 2025
• Orthopaedic journal of sports medicine
  Smith Calvin, Magrini Mitchel, Dowling Brittany, Williams Elias, Johnson Quincy R., Luera Micheal J., Pennartz Kase, Influence of Throwing Kinematics on Ulnar Collateral Ligament Thickness in Collegiate Baseball Players
  13:4 2025
• Innovation in aging
  Hoffman Rashelle, Stoffel Devon, Murphy Blake, Krywe April, Magrini Mitchel, THE IMPACT OF HIIT ON MUSCULAR, ENDURANCE, AND QUALITY OF LIFE METRICS IN OLDER ADULTS
  8:Suppl 1, p. 1346 - 1346 2024
• Medicine and science in sports and exercise
  Katsavelis Dimitrios, Hammond Kelley G., Barker Lee, Farmer Brooke, Murphy Blake, Magrini Mitchel A., Effectiveness Of An 8-week Progressive Resistance Training Protocol On Muscle Activation And Recovery Time During Slipping In Older Adults
  56:10S, p. 83 - 83 2024
• Journal of athletic training
  Frerichs Connor, DeHope Joseph, Chamberlain Maggie, Bassett Dylan, Farmer Brooke, Kyvelidou Anastasia, Magrini Mitchel, Grindstaff Terry L, The effects of verbal cues on EMG activity during a quadriceps setting exercise 2024
• Nutraceuticals
  Gonzalez Marcos, Jachino Caroline, Murphy Blake, Heinemann Kaitlyn, Magrini Mitchel A., Bredahl Eric C., Eckerson Joan M., Siedlik Jacob A., The Effect of Acute Ketone Supplementation on Time to Fatigue in NCAA Division I Cross-Country Athletes
  4:2, p. 232 - 240 2024
• Clinical biomechanics (Bristol)
  Magrini Mitchel A., Hoffman Rashelle, Barnett Taylor, Bruursema Jennifer, Siedlik Jacob, Effectiveness of a multicomponent rehabilitation protocol on outcomes following post-acute care, p. 106138 - 2023
• Nutrients
  Law David, Magrini Mitchel A., Siedlik Jacob A., Eckerson Joan, Drescher Kristen M., Bredahl Eric C., Creatine and Resistance Training: A Combined Approach to Attenuate Doxorubicin-Induced Cardiotoxicity
  15:18, p. 4048 2023
• Journal of strength and conditioning research
  Barker Leland, Siedlik Jacob, Magrini Mitchel, Uesato Sarai, Wang Harvey, Sjovold Alex, Ewing Garrett, Harry John R., Eccentric Force Velocity Profiling: Motor Control Strategy Considerations and Relationships to Strength and Jump Performance
  37:3, p. 574 - 580 2023
• Medicine and science in sports and exercise
  Bredahl Eric C., Johnson Nik, Kettler Elizabeth, Law David, Dalicandro Megan, Siedlik Jake, Magrini Mitchel, Eckerson Joan, Drescher Kristen, Controlled Metabolic Depression With Adenosine Receptor Agonists
  54:9S, p. 670 - 670 2022
• Journal of strength and conditioning research
  Moghaddam Masoud, Estrada Carlos A., Jacobson Bert H., Muddle Tyler W. D., Magrini Mitchel A., Jenkins Nathaniel D. M., Similar Anaerobic and Aerobic Adaptations After 2 High-Intensity Interval Training Configurations: 10:5 s vs. 20:10 s Work-to-Rest Ratio
  35:6, p. 1685 - 1692 2021
• Journal of Motor Behavior
  Magrini Mitchel A., Jenkins Nathaniel D.M., DeFreitas Jason M., Colquhoun Ryan J., Ferrell Matt C., Fleming Sydnie R., Mota Jacob A., Poidomani Nick M., Siedlik Jacob A., The Influence of Motor Unit Number and Muscle Activation on Early Phase Rate of Torque Development in Younger and Older Men 2021
• Clinical Parkinsonism and Related Disorders
  Hammond Kelley G., Magrini Mitchel A., Scott Bickel C., Bamman Marcas M., Siedlik Jacob A., Influence of muscle fatigue on contractile twitch characteristics in persons with parkinson's disease and older adults
  5 2021
• Medicine and science in sports and exercise
  Magrini Mitchel, Jenkins Nathaniel, DeFreitas Jason, Colquhoun Ryan, Fleming Sydnie, Ferrell Matthew, Physiological Determinants Of The Rate Of Torque Development In Older Men: A Pilot Study: 3413 Board #234 May 29 2:30 PM - 4:00 PM
  52:7 Suppl, p. 941 - 941 2020
• Journal of electromyography and kinesiology
  Tomko Patrick M., Banks Nile F., Colquhoun Ryan J., Magrini Mitchel A., Muddle Tyler W. D., Jenkins Nathaniel D. M., Maximal contraction methods influence the magnitude and reliability of global electromyographic signal characteristics
  48, p. 121 - 127 2019
• Medicine and science in sports and exercise
  Banks Nile, Tomko Patrick, Jenkins Nathaniel, Emerson Sam, Colquhoun Ryan, Muddle Tyler, Magrini Mitchel, ADORA2A, but Not CYP1A2, Genotype Influences Caffeineʼs Effect On Glucose Responses To A Carbohydrate Feeding: 2574 Board #238 May 31 11:00 AM - 12:30 PM
  51:6 Suppl, p. 716 - 716 2019
• Medicine and science in sports and exercise
  Muddle Tyler W.D., Colquhoun Ryan J., Tomko Patrick M., Magrini Mitchel A., Banks Nile F., Jenkins Nathaniel D.M., Test-restest Reliability Of Bioimpedance Spectroscopy For The Analysis Of Body Composition In Physically Active Males
  51:6S, p. 909 - 910 2019
• Medicine and science in sports and exercise
  Magrini Mitchel A., Colquhoun Ryan, Jenkins Nathaniel, DeFreitas Jason, Neural And Contractile Determinants Of Rate Of Force Development: A Preliminary Analysis
  51:6S, p. 345 - 346 2019
• Medicine and science in sports and exercise
  Colquhoun Ryan J., Fleming Sydnie R., Tomko Patrick M., Magrini Mitchel A., Ferrell Matthew C., Banks Nile F., Gradnigo Trey, Jenkins Nathaniel D.M., Reliability of Motor Unit Behavior during a Maximal Voluntary Isometric Contraction of the Knee Extensors
  51:6S, p. 340 - 341 2019
• European journal of applied physiology
  Hester Garrett M., Colquhoun Ryan J., Magrini Mitchel A., Barrera-Curiel Alejandra, Estrada Carlos A., DeFreitas Jason M., Olmos Alex A., Bailly Alyssa R., Ha Phuong L., Cross-education: effects of age on rapid and maximal voluntary contractile characteristics in males
  119:6, p. 1313 - 1322 2019
• Journal of strength and conditioning research
  Muddle Tyler W. D., Tomko Patrick M., Magrini Mitchel A., Colquhoun Ryan J., Luera Micheal J., Jenkins Nathaniel D. M., IMPACT OF FATIGUING, SUBMAXIMAL HIGH- VS. LOW-TORQUE ISOMETRIC EXERCISE ON ACUTE MUSCLE SWELLING, AND ECHO INTENSITY IN RESISTANCE-TRAINED MEN
  33:4, p. 1007 - 1019 2019
• Journal of aging and physical activity
  Hester Garrett M., Magrini Mitchel A., Pope Zachary K., Olmos Alex A., Colquhoun Ryan J., Barrera-Curiel Alejandra, Estrada Carlos A., DeFreitas Jason M., Age Does Not Attenuate Maximal Velocity Adaptations in the Ipsilateral and Contralateral Limbs During Unilateral Resistance Training
  27:1, p. 1 - 8 2019
• Experimental physiology
  Jenkins Nathaniel D. M., Colquhoun Ryan J., Tomko Patrick M., Fleming Sydnie, Gradnigo Trey, Magrini Mitchel A., Muddle Tyler W. D., Ferrell Matthew, El-Sohemy Ahmed, Genetic variant in the beta(2)-adrenergic receptor (Arg16Gly) influences fat-free mass, muscle strength and motor unit behaviour in young men
  103:12, p. 1645 - 1655 2018
• Journal of neurophysiology
  Colquhoun Ryan J, Magrini Mitchel A, Tomko Patrick M, Muddle Tyler W D, Jenkins Nathaniel D M, The influence of input excitation on the inter- and intra-day reliability of the motor unit firing rate versus recruitment threshold relationship
  120:6, p. 3131 - 3139 2018
• Ultrasound (Leeds, England)
  Tomko Patrick M, Luera Micheal J, Jenkins Nathaniel DM, Muddle Tyler WD, Magrini Mitchel A, Colquhoun Ryan J, Reliability and differences in quadriceps femoris muscle morphology using ultrasonography: The effects of body position and rest time
  26:4, p. 214 - 221 2018
• Journal of electromyography and kinesiology
  Tomko Patrick M., Colquhoun Ryan J., Magrini Mitchel A., Muddle Tyler W. D., Jenkins Nathaniel D. M., Global electromyographic signal characteristics depend on maximal isometric contraction method in the knee extensors
  42, p. 111 - 116 2018
• Journal of strength and conditioning research
  Magrini Mitchel A., Sellers John H., Colquhoun Ryan J., Conchola Eric C., Hester Garrett M., Thiele Ryan M., Pope Zach K., Smith Doug B., CAN SQUAT JUMP PERFORMANCE DIFFERENTIATE STARTERS VS. NONSTARTERS IN DIVISION I FEMALE SOCCER PLAYERS?
  32:8, p. 2348 - 2355 2018
• Medicine and science in sports and exercise
  Moghaddam Masoud, Muddle Tyler W.D., Estrada Carlos A., Magrini Mitchel A., Jenkins Nathaniel D.M., Jacobson Bert H., Comparison of Ultrashort Versus Short High-Intensity Interval Training for Body Composition, Anaerobic, and Aerobic Performance
  50:5S, p. 147 - 147 2018
• Medicine and science in sports and exercise
  Colquhoun Ryan, Muddle Tyler, Magrini Mitchel, Haun Cody, Tomko Patrick, Martin Jeffrey, Luera Michael, Mackey Cameron, Vann Christopher, Young Kaelin, DeFreitas Jason, Roberts Michael, Jenkins Nathaniel, Relationships between Motor Unit Behavior during Maximal Effort Contractions and Skeletal Muscle Phenotype: 881 Board #142 May 30 2: 00 PM - 3: 30 PM
  50:5S Suppl 1, p. 201 - 201 2018
• Medicine and science in sports and exercise
  Ha Phuong, Magrini Mitchel, Hester Garrett, Colquhoun Ryan, Pope Zachary, Barrera-Curiel Alejandra, Estrada Carlos, DeFreitas Jason, Effects Of Resistance Training On Maximal Motor Unit Firing Rates In Young And Older Males: 1820 Board #81 May 31 3: 30 PM - 5: 00 PM
  50:5S Suppl 1, p. 429 - 430 2018
• Medicine and science in sports and exercise
  Barrera-Curiel Alejandra, Hernandez-Sarabia Jesus, Colquhoun Ryan, Tomko Patrick, Jenkins Nathaniel D, DeFreitas Jason, Magrini Mitchel, Thiele Ryan, Antagonist Coactivation During A Reactive Leg Drop In Young And Older Adults: 2275 Board #111 June 1 9: 30 AM - 11: 00 AM
  50:5S Suppl 1, p. 556 - 557 2018
• Medicine and science in sports and exercise
  Olmos Alex A., Hester Garrett M., Pope Zachary K., Magrini Mitchel A., Colquhoun Ryan J., Barrera-Curiel Alejandra, Estrada Carlos A., DeFreitas Jason M., Ipsilateral and Contralateral Rapid Torque Adaptations To Unilateral Resistance Training In Young and Older Males
  50:5S, p. 365 2018
• Medicine and science in sports and exercise
  Magrini Mitchel, Tomko Patrick, Jenkins Nathaniel, Hernandez-Sarabia Jesus, Colquhoun Ryan, Barrera-Curiel Alejandra, Thiele Ryan, DeFreitas Jason, Both Slower Sensory Response Time and Electromechanical Delay Explain Age-related Differences in the Reactive Leg Drop: 2322 Board #158 June 1 11: 00 AM - 12: 30 PM
  50:5S Suppl 1, p. 571 - 571 2018
• Journal of neurophysiology
  Magrini Mitchel A, Blackstock Taryn S, Thiele Ryan M, Colquhoun Ryan J, Barrera-Curiel Alejandra, DeFreitas Jason M, The reactive leg drop: a simple and novel sensory-motor assessment to predict fall risk in older individuals
  119:4, p. 1556 - 1561 2018
• Physiological reports
  Muddle Tyler W. D., Magrini Mitchel A., Colquhoun Ryan J., Luera Micheal J., DeFreitas Jason M., Jenkins Nathaniel D. M., Effects of fatiguing, submaximal high- versus low-torque isometric exercise on motor unit recruitment and firing behavior
  6:8, p. e13675 - n/a 2018
• Orthopaedic journal of sports medicine
  Luera Micheal J., Dowling Brittany, Magrini Mitchel A., Muddle Tyler W. D., Colquhoun Ryan J., Jenkins Nathaniel D. M., Role of Rotational Kinematics in Minimizing Elbow Varus Torques for Professional Versus High School Pitchers
  6:3, p. 2325967118760780 - 2325967118760780 2018
• Physiological reports
  Colquhoun Ryan J., Haun Cody T., Magrini Mitchel A., Muddle Tyler W. D., Tomko Patrick M., Martin Jeffrey S., Luera Micheal J., Mackey Cameron S., Vann Christopher G., Young Kaelin C., DeFreitas Jason M., Roberts Michael D., Jenkins Nathaniel D. M., Muscle phenotype is related to motor unit behavior of the vastus lateralis during maximal isometric contractions
  6:5, p. e13636 - n/a 2018
• Strength and conditioning journal
  Magrini Mitchel, Dawes J. Jay, Spaniol Frank J., Roberts Adam, Speed and Agility Training for Baseball/Softball
  40:1, p. 68 - 74 2018
• Isokinetics and exercise science
  Magrini Mitchel A., DeFreitas Jason M., Colquhoun Ryan J., Barrera-Curiel Alejandra, Thiele Ryan M., Smith Doug B., Jenkins Nathaniel D. M., Muscle size, strength, power, and echo intensity, but not specific tension, are affected by age in physically active adults
  26:2, p. 95 - 103 2018
• Medicine and science in sports and exercise
  Sellers John H., Monaghan Taylor M., Schnaiter-Brasche Jessica A., Miller Michelle M., Magrini Mitchel A., Jacobson Bert H., Efficacy of Normobaric Intermittent Hypoxic Training to Improve VO2peak During Acute Hypobaric Hypoxia Exposure
  49:5S, p. 246 2017
• Medicine and science in sports and exercise
  Mackey Cameron S., Thiele Ryan M., Magrini Mitchel A., DeFreitas Jason M., Relationship Between Estimated Muscle Fiber-type And Peak Velocity For The Upper And Lower Extremity
  49:5S, p. 801 - 802 2017
• Medicine and science in sports and exercise
  Olmos Alex A., Barrera-Curiel Alejandra, Estrada Carlos A., DeFreitas Jason M., Magrini Mitchel A., Hester Garrett G., Pope Zachary K., Colquhoun Ryan J., Maximal Velocity Adaptions During Unilateral Resistance Training In Older Adults
  49:5S, p. 49 - 50 2017
• Medicine and science in sports and exercise
  Magrini Mitchel A., Muddle Tyler W.D., Colquhoun Ryan J., DeFreitas Jason M., Smith Doug B., Jenkins Nathaniel D.M., Barrera-Curiel Alejandra, Thiele Ryan M., Relationships Among and Differences between Muscle Quality and Functional Performance in Younger and Older Women
  49:5S, p. 51 - 52 2017
• Medicine and science in sports and exercise
  Luera Micheal J., Magrini Mitchel A., Muddle Tyler W.D., Colquhoun Ryan J., DeFreitas Jason M., Dowling Brittany, Jenkins Nathaniel D.M., Differences Among Kinetics, Kinematics, Performance, and Elbow Varus Torque in Professional Versus High School Pitchers
  49:5S, p. 736 2017
• Medicine and science in sports and exercise
  Estrada Carlos A., Speer Allie G., Colquhoun Ryan J., Magrini Mitchel A., Jacobson Bert H., DeFreitas Jason M., Intra- And Inter-set Velocity Characteristics During High- And Low-load Resistance Training To Failure
  49:5S, p. 129 - 130 2017
• Medicine and science in sports and exercise
  Colquhoun Ryan J., Roberson Paul A., Haun Cody T., Mumford Petey W., Pascoe David D., Feeney Mary P., Young Kaelin C., Martin Jeffrey S., Luera Michael J., Roberts Michael D., Muddle Tyler W.D., Riffe Joshua J., Magrini Mitchel A., Mackey Cameron S., Stock Matt S., Jenkins Nathaniel D.M., DeFreitas Jason M., The Effects Of A Muscle Biopsy On Motor Unit Firing Properties
  49:5S, p. 612 - 613 2017
• Medicine and science in sports and exercise
  Muddle Tyler W.D., Magrini Mitchel A., Colquhoun Ryan J., Thiele Ryan M., M Jenkins Nathaniel D., Comparison Of Quadriceps Femoris Muscle Morphology Using Ultrasonography During Two Different Body Positions
  49:5S, p. 466 2017
• Sports (Basel)
  Gillett Javair S., Dawes J. Jay, Simao Roberto, Bunker Derek J., Spaniol Frank J., Rhea Matthew R., Rogowski Joe P., Magrini Mitchel A., A Description and Comparison of Cardiorespiratory Fitness Measures in Relation to Pitching Performance Among Professional Baseball Pitchers
  4:1, p. 14 2016
• International journal of exercise science
  Magrini Mitchel, Dawes J, Elder Craig, Kluge Mary, Power Training and Functional Performance in Middle Aged Women: A Pilot Study
  9:3, p. 327 - 335 2016

Grants

• Need for Speed: The Effect of a Lower Body Velocity-Based Training Protocol on Neuromuscular Plasticity, T-cell Activation Rates, and Fall Risk in Older Adults/Sponsor: National Strength and Conditioning Association Foundation/NSCAF

• Non-Invasive Assessment of Neuromuscular Function Research Start-Up/Sponsor: State of Nebraska - LB692

• High-Intensity Interval Training: Youngest-old to Oldest-old Adults/Sponsor: Health Sciences Strategic Investment Fund/HSSIF

• The Effect of Hydration Status and Muscle Glycogen Content on Ultrasound Derived Muscle Imaging Variables/Sponsor: CURAS Magis Investigatio Research Award/MIRA

• High-Intensity Interval Training for Older Adults/Sponsor: CURAS Magis Investigatio Research Award/MIRA

• The Influence of Movement Velocity Biofeedback on Muscle Activation and Self Perception in Older Adults with Sarcopenia/Sponsor: Foundation for Physical Therapy Research