Effects of strength training on strength development and joint position sense in functionally unstable ankles

C L Docherty, J H Moore, B L Arnold, C L Docherty, J H Moore, B L Arnold

Abstract

Objective: To examine the effects of ankle-strengthening exercises on joint position sense and strength development in subjects with functionally unstable ankles.

Design and setting: Subjects were randomly assigned to a training or control group. The training group participated in a 6-week strength-training protocol using rubber tubing 3 times a week throughout the training period. The control group did not participate in the strength-training protocol.

Subjects: Twenty healthy college students (10 females, 10 males, age = 20.6 +/- 2.23 years; ht = 176.40 +/- 7.14 cm; wt = 74.18 +/- 10.17 kg) with a history of functional ankle instability volunteered to participate in this study.

Measurements: We pretested and posttested dorsiflexor and evertor isometric strength with a handheld dynamometer and collected joint position sense (JPS) data at 20 degrees for inversion and plantar flexion and at 10 degrees for eversion and dorsiflexion.

Results: Statistical tests for strength and JPS revealed significant group-by-time interactions for dorsiflexion strength, eversion strength, inversion JPS, and plantar flexion JPS. Simple main-effects testing revealed improvements in training group strength and JPS at posttesting. There were no significant effects for eversion JPS, but the group main effect for dorsiflexion JPS was significant, with the experimental group having better scores than the control group.

Conclusions: Ankle-strengthening exercises improved strength, inversion JPS, dorsiflexion JPS, and plantar flexion JPS in subjects with functionally unstable ankles.

References

    1. Am J Phys Med. 1979 Jun;58(3):115-30
    1. Clin Sports Med. 1989 Oct;8(4):877-91
    1. Sports Med. 1988 Sep;6(3):146-68
    1. Int J Sports Med. 1988 Apr;9(2):141-4
    1. Int J Sports Med. 1986 Oct;7(5):291-4
    1. Acta Physiol Scand. 1970 Mar;78(3):315-33
    1. Brain. 1972;95(4):705-48
    1. J Neurophysiol. 1973 Nov;36(6):1090-103
    1. J Bone Joint Surg Br. 1965 Nov;47(4):661-8
    1. J Bone Joint Surg Br. 1965 Nov;47(4):678-85
    1. Am J Sports Med. 1984 Nov-Dec;12(6):441-6
    1. Med Sci Sports Exerc. 1984;16(1):64-6
    1. J Orthop Sports Phys Ther. 1995 Feb;21(2):90-3
    1. J Orthop Sports Phys Ther. 1995 Apr;21(4):206-15
    1. J Bone Joint Surg Am. 1955 Dec;37-A(6):1237-43
    1. J Physiol. 1958 Mar 11;140(3):408-20
    1. Q J Exp Physiol Cogn Med Sci. 1961 Oct;46:389-98
    1. J Physiol. 1964 Oct;174:109-31
    1. J Physiol. 1964 Oct;174:132-51
    1. J Physiol. 1951 Dec 28;115(4):456-69
    1. J Physiol. 1952 Jun;117(2):152-71
    1. J Athl Train. 1997 Apr;32(2):127-35

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