Author/Authors :
Tajika، Tsuyoshi نويسنده Department of Orthopaedic Surgery, Gunma University
Graduate School of Medicine, Gunma, Japan , , Kobayashi، Tsutomu نويسنده Department of Physical therapy, Takasaki University of
Health and Welfare, Gunma, Japan , , Yamamoto، Atsushi نويسنده , , Shitara، Hitoshi نويسنده Department of Orthopaedic Surgery, Gunma University
Graduate School of Medicine, Gunma, Japan , , Ichinose، Tsuyoshi نويسنده Department of Orthopaedic Surgery, Gunma University
Graduate School of Medicine, Gunma, Japan , , Shimoyama، Daisuke نويسنده Department of Orthopaedic Surgery, Gunma University
Graduate School of Medicine, Gunma, Japan , , Okura، Chisa نويسنده Department of Orthopaedic Surgery, Gunma University
Graduate School of Medicine, Gunma, Japan , , Kanazawa، Saeko نويسنده Department of Orthopaedic Surgery, Gunma University
Graduate School of Medicine, Gunma, Japan , , Nagai، Ayako نويسنده Department of Orthopaedic Surgery, Gunma University
Graduate School of Medicine, Gunma, Japan , , Takagishi، Kenji نويسنده Department of Orthopaedic Surgery, Gunma University
Graduate School of Medicine, Gunma, Japan ,
Abstract :
Grip and pinch strength are crucially important attributes and
standard parameters related to the functional integrity of the hand. It
seems significant to investigate normative data for grip and pinch
strength of baseball players to evaluate their performance and
condition. Nevertheless, few reports have explained the association
between grip and pinch strength and anthropometric variables and types
of pitch throwing for baseball pitchers. The aim of this study was to
measure and evaluate clinical normative data for grip and tip, key,
palmar pinch strength and to assess the relationship between these data
and anthropometric variables and types of pitch throwing among Japanese
high-school baseball pitchers. One hundred-thirty three healthy high
school baseball pitchers were examined and had completed a
self-administered questionnaire including items related to age, hand
dominance, throwing ratio of type of pitch. A digital dynamometer was
used to measure grip strength and a pinch gauge to measure tip, key and
palmer pinch in both dominant and nondominant side. Body composition was
measured by the multi frequency segmental body composition analyzer.
Grip strength and tip and palmer pinch strength in dominant side were
statistically greater than them in nondominant side (P < 0.05).
There were significant associations between grip strength and height (r
= 0.33, P < 0.001), body mass (r = 0.50, P < 0.001), BMI
(r = 0.37, P < 0.001), muscle mass of upper extremity (r = 0.56,
P < 0.001), fat free mass (r = 0.57, P < 0.001), fat mass
(r = 0.22, P < 0.05) in dominant side. A stepwise multiple
regression analysis revealed that fat free mass and tip, palmer, key
pinch strength were predictors of grip strength in dominant side. No
statistical significant correlations were found between the throwing
ratio of types of pitches thrown and grip strength and tip, key, palmar
pinch strength. Our result provides normative values and evidences for
grip and pinch strengths in high school baseball pitchers.
