Biomedical Engineering Reference
In-Depth Information
−
20
Axial rotation wrt
thorax, Spinal tilt
(Sz)
Axial rotation wrt
Scapula, Spinal Tilt
(Sz)
−
20
−
40
−
40
−
60
−
60
−
80
−
80
−
100
: R
2
Linear = 0,344
−
100
R
2
Linear = 0,891
−
120
−
120
−
5
0
5 10
Spinal Tilt (Sz)
15
20
25
Fig. 2
Volleyball athletes: correlation between spinal tilt (degrees) (Szt) and shoulder axial
rotation (degrees)
w.r.t.
thorax (TH) and
w.r.t.
scapula (degrees) (GH) in fast condition
4
Discussion
Several studies had identified several morphologic and functional adaptations on
the dominant shoulder of overhead athletes, such as volleyball players [
53
], water
polo players [
54
], baseball players [
33
,
45
,
49
,
55
-
57
], swimmers [
10
] and body
building [
28
].
In our study, throwers also showed a significant increase on glenohumeral exter-
nal rotation and loss of internal rotation, while the rotational arch was maintained
(External Rotation
Internal Rotation) as previously reported [
28
,
33
,
49
,
57
-
62
].
In opposition to our study and considering glenohumeral rotational range of
motion variation in overhead-athletes Dwelly et al. [
23
] demonstrated using a
sample of 29 baseball male athletes and 19 softball female athletes, that there is
a significant gain of shoulder external rotation amplitude at the dominant arm, and a
significant raise of the total arch of motion. No changes were found at the amplitude
of internal rotation during the season.
C
