ARTICLE –
abstractShoulder
rotator muscle normative values in Indian overhead athletes with and
without impingement syndrome Sandhu Jaspal Singh, Yadav Abhinav, Shenoy Shweta Department of Sports Medicine and Physiotherapy, Guru Nanak Dev University, Amritsar, Punjab, India
Abstract
Background:
Few researchers have examined shoulder strength in different overhead
athletes with and without impingement symptoms. To compare internal and
external rotation isokinetic peak torque, average torque, average power
and fatigue index at different speeds in different overhead athletes. Methods:
80 male athletes from swimming, badminton, handball and cricket were
taken in 2 groups, injured(with impingement) and normal(without
impingement) (40 in both groups) between the age group 20-30 years
{mean normal group (24.9±2.19), injured group
(25.63±1.6)}, with participation in university, state and
national level sporting competitions were included, 10 from each sport. Result:
We measured concentric peak torque, average torque, average power,
fatigue index of internal and external rotators of the shoulder at
speeds of 60 and 120 Radians/sec. Swimmers have the highest values for
the outcome variables in both injured and normal groups. Significant
group differences are present in the normal group indicating training
adaptations for the specific sports. Between the injured and normal
groups there are significant differences, showing that impingement
affects muscular balance. In the injured athletic group, group
differences are significant only for external rotator average torque at
higher speed (p=0.03). Conclusions: differences in between the
groups appear to be related more to injury prevalence than to absolute
strength. Shoulder dysfunction related to strength deficits also may
exist in adult male overhead athletes. Intergroup differences in normal
subjects are due to the training adaptations of the respective sports.
Preventive shoulder strengthening programs focused on external rotators
strength at higher speeds may be warranted for all overhead athletes.
Key
words:isokinetic shoulder rotations, impingement, overhead athletes
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