Relationship between static and dynamic foot postures in professional baseball players.

STUDY DESIGN Observational study of static and dynamic foot postures in professional baseball players. BACKGROUND Throughout the course of a professional baseball season, running, cutting, and sprinting activities can produce a breakdown in players' foot function, causing overuse injuries. OBJECTIVES To investigate the relationship between static and dynamic foot postures; to determine the occurrence of abnormal foot postures in professional baseball players and the incidence of overuse injuries in the lower extremity; and to compare the foot postures of pitchers to those of positional players. METHODS AND MEASURES The foot postures of 74 professional baseball players were evaluated at rest and during gait. Measures of static foot posture were obtained with a goniometer and included the subtalar neutral position, forefoot/rearfoot position, ankle joint dorsiflexion, tibial angle in standing, and calcaneal angle in standing. The FootTrak motion analysis system provided measures of dynamic foot posture (rearfoot supination and pronation) during the stance phase of gait. A questionnaire was completed by players who reported previous lower extremity injuries. The chi-square statistic was used to determine the associations between forefoot position (varus or valgus) and the amount of foot pronation during gait. RESULTS The forefoot varus and calcaneal valgus in standing was significantly associated with the maximum pronation during the stance phase of gait. Of the 65 players who demonstrated excessive pronation (> 8 degrees), 28 (43%) also reported a previous lower extremity injury. No statistically significant difference occurred, however, between injured and uninjured players with respect to the mean values of static or dynamic foot posture. In addition, foot postures were not associated with a player's position. CONCLUSIONS Selected measures of static rearfoot and forefoot postures may have value in predicting dynamic rearfoot movement during the stance phase of gait. Excessive pronation in the baseball players we studied was not found to be a significant contributing factor in the development of overuse injuries.

[1]  F. Delacerda.  A study of anatomical factors involved in shinsplints. , 1980, The Journal of orthopaedic and sports physical therapy.

[2]  J. Taunton,et al.  A Survey of Overuse Running Injuries. , 1981, The Physician and sportsmedicine.

[3]  S. James,et al.  Injuries to runners , 1974, The American journal of sports medicine.

[4]  M Solomonow,et al.  Biomechanics of muscle overuse injuries: a theoretical approach. , 1987, Clinics in sports medicine.

[5]  H. M. Sommer,et al.  Effect of foot posture on the incidence of medial tibial stress syndrome. , 1995, Medicine and science in sports and exercise.

[6]  W. Kibler,et al.  Functional biomechanical deficits in running athletes with plantar fasciitis , 1991, The American journal of sports medicine.

[7]  M. Pierrynowski,et al.  Proficiency of foot care specialists to place the rearfoot at subtalar neutral. , 1996, Journal of the American Podiatric Medical Association (Print).

[8]  M. Cornwall,et al.  The relationship between static lower extremity measurements and rearfoot motion during walking. , 1996, The Journal of orthopaedic and sports physical therapy.

[9]  M P Murray,et al.  COMPARISON OF FREE AND FAST SPEED WALKING PATTERNS OF NORMAL MEN , 1966, American journal of physical medicine.

[10]  T P Schmalzried,et al.  Injuries in Runners: A Prospective Study of Alignment , 1998, Clinical journal of sport medicine : official journal of the Canadian Academy of Sport Medicine.

[11]  S. Messier,et al.  Etiologic factors associated with selected running injuries. , 1988, Medicine and science in sports and exercise.

[12]  M. L. Root,et al.  Normal and abnormal function of the foot , 1977 .

[13]  M. Cornwall,et al.  Comparison of rearfoot motion in overground versus treadmill walking. , 1995, Journal of the American Podiatric Medical Association.

[14]  M. Kadaba,et al.  Repeatability of phasic muscle activity: Performance of surface and intramuscular wire electrodes in gait analysis , 1985, Journal of orthopaedic research : official publication of the Orthopaedic Research Society.

[15]  J. Hamill,et al.  Relationship between selected static an dynamic lower extremity measures , 1989 .

[16]  P. Catlin,et al.  The frontal plane relationship of the forefoot to the rearfoot in an asymptomatic population. , 1994, The Journal of orthopaedic and sports physical therapy.

[17]  E. Kreighbaum,et al.  Analysis of selected alignment of the lower extremity related to the shin splint syndrome. , 1979, Journal of the American Podiatry Association.

[18]  M. Pierrynowski,et al.  Evaluation of soft foot orthotics in the treatment of patellofemoral pain syndrome. , 1993, Physical therapy.

[19]  P. Catlin,et al.  The effect of two types of foot orthoses on rearfoot mechanics. , 1995, The Journal of orthopaedic and sports physical therapy.

[20]  R. Donatelli,et al.  Effects of three different posting methods on controlling abnormal subtalar pronation. , 1994, Physical therapy.

[21]  T P Schmalzried,et al.  Lower extremity alignment and risk of overuse injuries in runners. , 1997, Medicine and science in sports and exercise.

[22]  D Brunt,et al.  The effect of foot orthotics and gait velocity on lower limb kinematics and temporal events of stance. , 1993, The Journal of orthopaedic and sports physical therapy.

[23]  M R Pierrynowski,et al.  The effect of soft foot orthotics on three-dimensional lower-limb kinematics during walking and running. , 1994, Physical therapy.

[24]  T G McPoil,et al.  Relationship between three static angles of the rearfoot and the pattern of rearfoot motion during walking. , 1996, The Journal of orthopaedic and sports physical therapy.

[25]  K. Leo,et al.  Total hip and knee replacement treatment programs: a report using consensus. , 1996, The Journal of orthopaedic and sports physical therapy.

[26]  M. Pierrynowski,et al.  Rear Foot Inversion/Eversion During Gait Relative to the Subtalar Joint Neutral Position , 1996, Foot & ankle international.

[27]  M. Cornwall,et al.  Relationship Between Neutral Subtalar Joint Position and Pattern of Rearfoot Motion During Walking , 1994, Foot & ankle international.

[28]  Jukka T. Vtasalo,et al.  Some biomechanical aspects of the foot and ankle in athletes with and without shin splints , 1983, The American journal of sports medicine.

[29]  O. Svensson,et al.  Kinematics of the Ankle/Foot Complex—Part 2: Pronation and Supination , 1989, Foot & ankle.

[30]  J. Taunton,et al.  Achilles tendinitis and peritendinitis: Etiology and treatment , 1984, The American journal of sports medicine.

[31]  J A Hanson,et al.  The influence of experience on the reliability of goniometric and visual measurement of forefoot position. , 1997, The Journal of orthopaedic and sports physical therapy.