Muscle fatigue and shoulder joint position sense

Journal/Book: Aus: Rehab in Review Vol.6 No.S 1998. Physikalische Medizin Heft 5 8. Jahrgang Oktober 1998 M 61. 1998;

Abstract: Carpenter J. E. et al.: The effects of muscle fatigue an shoulder joint Position Sense. Am. J. Sports Med. 26 (1998) 262-265 Previous studies have suggested that shoulder joint dysfunction may be associated with impairment of joint proprioception. Others have observed that upper extremity performance tends to deteriorate with muscle fatigue. This study sought to determine whether an association exists between shoulder joint proprioception and shoulder girdle muscle fatigue. Twenty subjects ranging in age from 19 to 30 years without history of shoulder injury or restrictive range of motion were recruited. Proprioception was measured in a seated position. The shoulder was internally and externally rotated at one degree per second until the subject could detect movement. Mean rotation displacement was used as a measurement of proprioception. Subjects' arms were then exercised at 180° per second until peak torque proprioception was then measured. In the results revealed that in rested shoulders motion was detected at a mean rotation of 0.92°. No difference was found between the dominant and non-dominant arm. Following exercise the ability to detect rotational movement had decreased significantly (73%) to 1.59° (p < 0.001). Conclusion: This study found that shoulder joint proprioception significantly worsens after fatiguing exercises. This finding suggests that shoulder stability as well as performance may decrease with fatigue. schö

Zurück | Weiter