ORIGINAL
PAPERS – abstractIsotonic
Evaluation of Peak Force in Overhead
Athletes with Shoulder Impingement Syndrome
Vikrant
Mohan Miglani, Shweta Shenoy, Jaspal Singh Sandhu
Department
of Sports Medicine and Physiotherapy, Guru Nanak Dev University,
Amritsar, State- Punjab, India
Abstract.
Background: Overhead
activities such as throwing, tennis, or volleyball place athletes at
considerable risk for overuse injuries. A relationship between
scapulothoracic muscle imbalance and shoulder pain has been suggested.
Objective: To compare the peak force during scapular
movements during
concentric and eccentric contraction in overhead athletes with
impingement syndrome and without impingement syndrome.
Design
and
Methodology: Experimental study with different subject design. 20
overhead athletes from various sports were participated in this study.
10 athletes had shoulder impingement syndrome and 10 were healthy
athletes. Surface electromyographic data were collected. Isotonic peak
force was evaluated during protraction-retraction and
Scaption-depression with two different loading conditions (i) 2kg load
and (ii) 6 kg load. Results: Isotonic peak force values for
protraction-retraction and scaption-depression were 6 % - 12 %
(p<0.005) less on the injured side (Right) of impingement group
when
compared to the same side of the control (Non-impingement) group and
also the force is decreased 5 % - 14 % (p<0.05) during all
scapular
movements, when compared to non-injured side of impingement group.
Force-Body weight ratio was decreased by 7 % - 13 % ( p<0.05) on
injured side of impingement group when compared to the same side of the
control group and force-Body weight ratio was decreased by 5 % - 14 %
(p<0.05) during all scapular movements when compared to
non-injured
side of impingement group.
Conclusion: Overhead athletes demonstrate decrease in peak force and
force- body weight ratio on the impingement side when compared to their
non-injured side; also the peak force and force- body weight ratio in
impingement patients was decreased when compared to normal athletes.
Key
words:
isotonic,
force,
scapular movements.
