Hip Adduction - 4640 - CYBEX VR2 Owner's And Service Manual

Hip Adduction
The Machine
• Back Pad - The back pad is angled to position the\
hips in 70 degrees of flexion creating both comfort
and ease in introducing proper spinal alignment.
• Variable Resistance - The cam provides increased
resistance at the point in the range where force out-
put of the involved musculature is the greatest.
• 10 to 205 Pounds by Fives - The top plate pro-
vides a minimum weight of ten pounds.
Subsequent plates in the weight stack are twenty
pounds each. Three "slide-on" five pound incre-
mental plates are securely positioned for easy
access and effortless addition thereby
providing 10 to 205 pounds in five pound incre-
ments.
The Abductors
• Hip Adduction With The Hip Flexed - The
movers of a joint with three degrees of freedom,
such as the hip, often change roles or actions
depending upon the starting position of the joint.
With the hip positioned in 70 degrees of flexion,
the adductors magnus, brevis and longus, the gra-
cilis and the pectineus continue to be strong adduc-
tors. The hamstrings are weaker associates in this
role. The functions of the tensor fasciae latae and
gluteus minimus are altered from abductors to
adductors due to the degree of hip flexion.
Conversely, the obturator internus and quadratus
femoris diminish as adductors for the same reason.
• Range of Motion - Hip adduction is limited maxi
mally at 90 degrees within the joint. This
is often limited further during active or resisted adduction by muscular insufficiency or by
meeting the other extremity at midline. The motion of adduction in a sealed position (hip
flexed) may begin from a position of extreme abduction in trained individuals (120 - 180)
but will commonly be limited to much less due to adductor length (passively and actively)
or active insufficiency (resisted eccentrically).
CYBEX VR2 Owner's Manual
MUSCLES TRAINED
Exercise
Page 3-17