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Original articles  EXERCISE PHYSIOLOGY AND BIOMECHANICS


The Journal of Sports Medicine and Physical Fitness 2005 March;45(1):44-52

language: English

Relationship between muscle strength in various isokinetic movements and kick performance among soccer players

Masuda K. 1, Kikuhara N. 2, Demura S. 1, Katsuta S. 3, Yamanaka K. 4

1 Faculty of Education, Kanazawa University, Ishikawa, Japan
2 Faculty of Business Administration Osaka University of Commerce, Osaka, Japan
3 Graduate School of Integrated Science and Art University of East Asia, Yamaguchi, Japan
4 Institute of Health and Sport Science University of Tsukuba, Ibaraki, Japan


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Aim. The ­present ­study was car­ried out to exam­ine rela­tion­ships ­between mus­cu­lar ­strength and ­ball veloc­ity ­with ­respect to 3 dif­fer­ent ­approach ­angles and focus­sing on ­both the kick­ing leg and the sup­port­ing leg ­among soc­cer ­players of dif­fer­ent ­skill lev­els.
Methods. Fourteen uni­ver­sity soc­cer ­players ­were divid­ed ­into 2 ­groups (super­i­or ­group, aver­age ­group), and ­kicked the ­ball ­with max­i­mal ­effort ­towards a tar­get 15 m ­away. The ­angles of ­approach to the sta­tion­ary ­ball var­ied in 3 direc­tions (­free, 1.57, 2.36 rad to the ­kick direc­tion). Mean ­ball veloc­ity and the suc­cess ­rate of strik­ing the tar­get ­with the ­ball ­were meas­ured. Maximal iso­ki­net­ic and con­cen­tric mus­cu­lar ­strength was meas­ured in ­terms of ­motions of the ­knee Ext/Flex, hip Ext/Flex and hip Abd/Add ­using an iso­ki­net­ic dyna­mom­e­ter.
Results. The ­mean ­ball veloc­ity at ­free and 1.57 rad ­approach ­angles relat­ed sig­nif­i­cant­ly ­with hip Add but not ­with ­knee Ext ­strength for the kick­ing leg. In con­trast, the ­ball veloc­ity at an ­approach ­angle of 2.36 rad sig­nif­i­cant­ly cor­re­lat­ed ­with ­knee Ext and hip Flex of the kick­ing leg. Although ­ball veloc­ity at the ­free and the 1.57 rad ­approach ­angles ­showed no rela­tion to ­strength of the sup­port­ing leg, the ­ball veloc­ity at the 2.36 rad ­approach ­angle ­showed a sig­nif­i­cant rela­tion­ship ­with ­knee Flex, hip Ext and hip Abd ­strength of the sup­port­ing leg. Furthermore, the super­i­or ­group had ­more ­strength var­i­ables relat­ed to per­for­mance ­than the aver­age ­group.
Conclusion. Different ­approach ­angles ­would ­alter the require­ment on mus­cle ­strength poten­tial of ­both kick­ing and sup­port­ing leg dur­ing kick­ing. Especially an ­angled ­approach to the ­kick direc­tion ­could ­require great­er hip exten­sion and abduc­tion ­strength on the sup­port­ing leg for a high­er capa­bil­ity for sta­bi­liz­ing ­body bal­ance. Besides, ­skill lev­el may ­alter the impor­tance of mus­cle ­strength require­ment to ­kick per­for­mance.

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