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CURRENT ISSUETHE JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS

A Journal on Applied Physiology, Biomechanics, Preventive Medicine,
Sports Medicine and Traumatology, Sports Psychology


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

EXERCISE PHYSIOLOGY AND BIOMECHANICS 

 Original articles

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

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.

language: English


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