Boyi Dai, Ph.D.

Assistant Professor
Biomechanics

RESEARCH INTERESTS

I am interested in injury biomechanics and sports biomechanics. I utilize motion, force, EMG measurements, and musculoskeletal modeling to understand the mechanism of exercise and sports related injuries and provide information for injury prevention and post-injury rehabilitation. I investigated the injury mechanism of ACL injuries, ACL re-injuries, ankle sprain, and low back injuries. I also conducted technique analysis for elite discus and javelin throwers. I am particularly interested in applying the knowledge of biomechanics to the developments of effective and efficient injury screening tools and injury prevention programs.

EDUCATION

Ph.D. Human Movement Science (emphasis in Biomechanics), The University of North Carolina at Chapel Hill (2012)

M.S. Kinesiology (emphasis in Biomechanics), Iowa State University (2009)

B.E. Exercise Science, Beijing Sport University (2007)

TEACHING

• KIN 3042 Biomechanics of Human Movement

AFFILIATIONS

• American Society of Biomechanics
• American College of Sports Medicine

GRANTS, HONORS, AWARDS

• Travel Award, 2011
  Graduate and Professional Student Federation, The University of North Carolina at Chapel Hill
• Graduate Student Writing Award, 2011
  American Kinesiology Association
• Outstanding Master Student, 2009
  Department of Kinesiology, Iowa State University
• Chinese National Scholarship, 2005
  Chinese Government
• Outstanding Student, 2005
  Beijing Sport University
• University Scholarship, 2004, 2006
  Beijing Sport University

PUBLICATIONS

Boyi Dai, Steve Leigh, Hanjun Li, Vicki S. Mercer, and Bing Yu (In press). The relationships between technique variability and performance in discus throwing. Journal of Sports Sciences

Boyi Dai, Robert J. Butler, William E. Garrett, and Robin M Queen (In Press). ACL reconstruction in adolescent patients: limb asymmetry and functional knee bracing. American Journal of Sports Medicine.

Boyi Dai, Christopher J. Sorensen, Timothy R. Derrick, and Jason C. Gillette (In Press). The effects of postseason break on knee biomechanics and lower extremity EMG in a stop-jump task: implications for ACL injury. Journal of Applied Biomechanics.

Boyi Dai, William B. Ware, and Carol A. Giuliani (2012). A structural equation model relating physical function, pain, and impaired mobility (IM), AND falls in older adults. Archives of Gerontology and Geriatrics, 55: 3, 645-652.

Boyi Dai, Daniel Herman, Hui Liu, William E. Garrett, and Bing Yu (2012). Prevention of ACL injury, part I: injury characteristics, risk factors, and loading mechanism. Research in Sports Medicine, 20: 3-4, 180-197.

Boyi Dai, Daniel Herman, Hui Liu, William E. Garrett, and Bing Yu (2012). Prevention of ACL injury, part II: effects of ACL injury prevention programs on neuromuscular risk factors and injury rate. Research in Sports Medicine, 20: 3-4, 198-222.

Boyi Dai, Sangeun Jin, Xiaopeng Ning, and Gary A. Mirka (2010). The effects of horizontal load speed and lifting frequency on lifting technique and biomechanics. Ergonomics, 53: 8, 1024-1032.

Boyi Dai, Christopher J. Sorensen, and Jason C. Gillette (2010). The effects of postseason break on stabilometric performance in female volleyball players. Sports Biomechanics, 9: 2, 115-122.

NATIONAL AND INTERNATIONAL PRESENTATIONS

Boyi Dai, Robert J. Butler, William E. Garrett, and Robin M. Queen. Gender effects on lower extremity biomechanics in adolescent patients following ACL reconstruction. American Society of Biomechanics 36th Meeting. Gainesville, FL, USA, 2012.

Boyi Dai, Bing Yu. Estimating ACL force from lower extremity kinematics and kinetics. American Society of Biomechanics 36th Meeting. Gainesville, FL, USA, 2012.

Robert J. Butler, William E. Garrett, Dean Taylor, Boyi Dai, Robin M. Queen. Functional testing following ACL rehabilitation: Are our patients “normal” at discharge?. Southern Orthopaedic Association Annual Meeting. White Sulphur Springs, WV, USA, 2012.

Robert J. Butler, William E. Garrett, Boyi Dai, Robin M. Queen. Do lower extremity mechanics correlate between a jump landing and a deep squat?. Southern Orthopaedic Association Annual Meeting. White Sulphur Springs, WV, USA, 2012.

Boyi Dai, Robert J. Butler, William E. Garrett, and Robin M. Queen. Predicting knee kinetic asymmetries from ground reaction forces in adolescent patients post ACL reconstruction. Human Movement Science Research Symposium. Chapel Hill, NC, USA, 2012.

Boyi Dai, William B. Ware, Carol A. Giuliani. A structural equation model relating physical function, pain, impaired mobility, and falls in older adults. Human Movement Science Research Symposium. Chapel Hill, NC, USA, 2012.

Robert J. Butler, Boyi Dai, Michael P. Reiman, William E. Garrett, Robin M. Queen. Are fundamental movement patterns meaningful in identifying patients at risk for sustaining a second ACL tear?. American Society of Sports Medicine Annual Meeting. San Francisco, California, USA, 2012.

Robert J. Butler, Boyi Dai, William E. Garrett, Robin M. Queen. Asymmetry in stop jump mechanics correlates to asymmetry in deep squat mechanics in patients 6 months following ACL reconstruction. American Society of Sports Medicine Annual Meeting. San Francisco, California, USA, 2012.

Mary E. Russell, Boyi Dai, Robert J. Butler, Robin M. Queen. Changes in plantar loading during the lower quarter Y balance test. American Society of Sports Medicine Annual Meeting. San Francisco, California, USA, 2012.

Boyi Dai, Robert J. Butler, William E. Garrett, and Robin M. Queen. Using ground reaction forces to predict knee kinetic asymmetries in adolescent patients post ACL reconstructions. ACL Research Retreat VI. Greensboro, NC, USA, 2012.

Boyi Dai and Carol Giuliani. A confirmatory path analysis relating physical functions and pain to falls in elderly adults. Gerontological Society of America 64th Annual Meeting. Boston, MA, USA, 2011.

Boyi Dai, Steve Leigh, Hanjun Li, and Bing Yu. The relationships between technique variability and performance in elite discus throwers during competition. American Society of Biomechanics 35th Meeting. Long Beach, CA, USA, 2011.

Boyi Dai, Robert J. Butler, William E. Garrett, and Robin M. Queen. Limb asymmetries during a side-cutting task in adolescent patients 6-12 month following ACL reconstruction. American Society of Biomechanics 35th Meeting. Long Beach, CA, USA, 2011.

Christopher J. Sorensen, Boyi Dai, and Jason C. Gillette. Trunk and lower extremity kinetics during variations of the forward lunge exercise. American Society of Sports Medicine 2011 Annual Meeting. Denver, CO, USA, 2011.

Robin M. Queen, Robert J. Butler, Boyi Dai, and William E. Garrett. Functional bracing and limb symmetry following ACL reconstruction in adolescent patients. American Society of Sports Medicine 2011 Annual Meeting. Denver, CO, USA, 2011.

Boyi Dai, Robert J. Butler, William E. Garrett, and Robin M. Queen. Limb asymmetries and bracing effects during a side-cutting task in adolescent patients following ACL reconstruction. Human Movement Science Research Symposium. Chapel Hill, NC, USA, 2011.

Sangeun Jin, Boyi Dai, Xiaopeng Ning, and Gary A. Mirka. The effect of horizontal load dynamics on lifting biomechanics. Human Factors and Ergonomics Society 2010 Annual Meeting. San Francisco, CA, USA, 2010.

Boyi Dai and Jason C. Gillette. Knee kinematics and kinetics at two landings in a vertical stop jump task. ACL Research Retreat V. Greensboro, NC, USA, 2010.

Boyi Dai, Timothy R. Derrick, and Jason C. Gillette. The effects of postseason break on knee sagittal plane kinematics and kinetics during a stop-jump task. Human Movement Science Research Symposium. Chapel Hill, NC, USA, 2010.

Boyi Dai, Christopher J. Sorensen and Jason C. Gillette. The effects of detraining on stabilometric performance in volleyball players. American Society of Biomechanics 33th Meeting. State College, PA, USA, 2009.

Christopher J. Sorensen, Boyi Dai, Patrick McIntyre, and Jason C. Gillette. The effects of strength training on knee biomechanics during a drop jump in males. American Society of Biomechanics 33th Meeting. State College, PA, USA, 2009.