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The main purpose of this study is to characterize and compare the 3D shoulder kinematics bilaterally while performing functional movement patterns tests that hypothetically replicate the 5 main phases of the throwing cycle. The tests are based on diagonal D2 for flexion (early and late cocking of the arm) and D2 for extension (acceleration, deceleration and follow-through of the arm) of the upper extremity of proprioceptive neuromuscular facilitation techniques.
The 3D shoulder kinematics (thorax, scapula and humerus) will be collected in different groups of subjects with specific characteristics. To load the upper extremity during PNF D2 for flexion and extension directions, elastic tubing (Thera-Band) will be used as resistance. Selection of the two resistances will be according to a self-perceived ability of the subjects to consistently move a maximal amount of resistance (color) during PNF D2 flexion and extension tests for 15s and 30s, respectively. Each subject will be permitted to sample various resistances in order to assist in selecting the most appropriate load, with no more than three practice repetitions permitted per each resistance sampled.
To perform the tests, subjects will be sited in a standard chair without armrests, with their feet and lower legs placed on another standard chair, positioned just in front of their chair and the non-testing arm placed across the thoracic wall, to minimize the participation of the legs and trunk to upper extremity performance during testing. Elastic tubing will be anchored to a stable base to perform the diagonals (Thera-Band door anchor accessory or the opposite foot). Five repetitions of each test on both sides will be performed, in two different moments (5-10 minutes apart). A rate of 2 seconds per repetition will be employed during recordings using a metronome. A rest period will be given between trials to avoid fatigue. To perform the tests, subjects will begin/end with their hand on the contralateral hip and end/begin at head height and shoulder width. A marker will be placed in the latter position to standardize the start and end of hand position. The order of the tests (PNF D2 flexion and extension) and side (symptomatic/dominant and asymptomatic/non-dominant) will be randomized.
Observational Model: Case Control, Time Perspective: Cross-Sectional
PNF D2 for flexion; low-to-moderate loading condition, PNF D2 for flexion; moderate-to-high loading condition, PNF D2 for extension; low-to-moderate loading condition, PNF D2 for extension; moderate-to-high loading condition
Faculdade de Motricidade Humana, Universidade de Lisboa
Not yet recruiting
Universidade do Porto
Published on BioPortfolio: 2016-08-03T06:08:26-0400
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