european college of sport science

IS-SS05 Sport and cultural identity
bout. With increased familiarity with the required exercise task, the RPE strategy became more aggressive, linear and with less metabolic
and cardiorespiratory reserve. This was associated with increased performance. Similarly, during exercise bouts of longer duration,
subjects started exercise bouts with lower RPE scores and maintained these lower RPE values until the final 20-30% of the exercise bout,
after which they increased the RPE to values similar to those recorded during the shorter exercise trials. Subjects therefore maintained a
greater metabolic and cardiorespiratory reserve during longer trials.
1 Noakes TD, St Clair GA, Lambert EV. From catastrophe to complexity: a novel model of integrative central neural regulation of effort and
fatigue during exercise in humans: summary and conclusions. Br J Sports Med 2005;39:120-4.
MUSCLE ACTIVATION PATTERNS IN SHOULDER IMPINGEMENT PATIENTS
STRICKLAND, J., GOSS-SAMPSON, M., WHITE, T.
UNIVERSITY OF GREENWICH
Introduction: Shoulder impingement is one of the most common presentations of shoulder joint problems 1. It appears to be caused by a
reduction in the sub-acromial space as the humerus abducts between 60o -120o – the ’painful arc’. Structures between the humeral
head and the acromion are thus pinched causing pain and further pathology 2. Shoulder muscle activity can influence this joint space but
it is unclear whether this is a cause or effect in impingement patients. This study aimed to observe muscle activation patterns in normal
and impingement shoulder patients and determine if there were any significant differences.
Method: 19 adult subjects were asked to perform shoulder abduction in their symptomatic arm and non-symptomatic. 10 of these subjects
(age 47.9 ± 11.2) were screened for shoulder impingement, and 9 subjects (age 38.9 ± 14.3) had no history of shoulder pathology.
Surface EMG was used to collect data for 6 shoulder muscles (Upper, middle and lower trapezius, serratus anterior, infraspinatus, middle
deltoids) which was then filtered and fully rectified. Subjects performed 3 smooth unilateral abduction movements at a cadence of 16
beats of a metronome set at 60bpm, and the mean of their results was recorded. T-tests were used to indicate any statistical significance
in the data sets. Significance was set at P