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The Journal of Sports Medicine and Physical Fitness 1998 December;38(4):330-6

Copyright © 1999 EDIZIONI MINERVA MEDICA

lingua: Inglese

Isokinetic testing of flexor and extensor muscles in athletes suffering from low back pain

Ganzit G. P., Chisotti L., Albertini G., Martore M., Gribaudo C. G.

Institute of Sports Medicine, CONI-FMSI, Turin, Italy


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Background. The aim of the ­study was to ver­i­fy the use­ful­ness of iso­ki­net­ic test­ing in ath­letes ­with chron­ic low ­back ­pain (LBP) to ­obtain quan­ti­ta­tive infor­ma­tion for reha­bil­i­ta­tion pur­pos­es.
Methods. Experimental ­design: a com­par­a­tive ­study. Setting: Physiotherapy Depart­ment - Institute of Sports Medicine in Italy. Participants: 50 men, ­aged 25 - 65, prac­tis­ing run­ning, ­cycling, tri­ath­lon, ten­nis, soc­cer, bas­ket­ball, vol­ley­ball, ski­ing and ­golf. The ­patients ­were divid­ed ­into two ­groups. Group A was treat­ed for 3 ­months ­with pos­tu­ral exer­cis­es 2 or 3 ­times a ­week. Group B was treat­ed for the ­same peri­od of ­time ­with resis­tive exer­cis­es per­formed by resort­ing to spe­cif­ic ­machines.
Measurements: before and ­after treat­ment, ­trunk mus­cle ­strength was eval­u­at­ed by ­means of an iso­ki­net­ic ­test car­ried out in a seat­ed posi­tion. The iso­ki­net­ic meas­ure­ments ­used ­were ­peak ­torque (PT), ­work, pow­er-in the ­best rep­e­ti­tion and ­total ­work (TW) in ­four rep­e­ti­tions. Both the ­pain and the func­tion­al impair­ment dur­ing phys­i­cal activ­ity was eval­u­at­ed by sub­jec­tive vis­u­al ana­log­ic ­scale.
Results. The PT ­showed a par­allel ­increase in flex­or and exten­sor mus­cles in Group A. In Group B it ­increased by 32.2% at 60°/s and 44.1% at 120°/s as for the exten­sor mus­cles ­while the flex­ion-to-exten­sion ­ratio ­decreased sig­nif­i­cant­ly. The TW reg­is­tered a ­bigger per­cent­age ­increase in ­both ­groups (+21% at 60°/s and +20.4% at 120°/s in Group A; +36.5% at 60°/s and +50.3% at 120°/s in Group B).
Conclusions. The two reha­bil­i­ta­tion pro­grammes had the ­same ­effect on the ­course of LBP, but in Group B we ­observed a ­bigger ­increase in ­strength ­which ­could be poten­tial­ly use­ful dur­ing a ­sports activ­ity.

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