Hip Abduction - 4645 - CYBEX VR2 Owner's And Service Manual

Hip Abduction
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 increments.
The Abductors
• Hip Abduction 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 gluteus maximus, piriformis and obturator
internus are the primary abductors.
• Range of Motion - In the erect position "pure"
hip abduction can be performed to 45 degrees on
each side (90 degrees between the two extremities).
However, when the hip is flexed all of the liga-
ments surrounding the joint are relaxed and addi-
tionally, skeletal limitation is eliminated. This may
allow as much as 120 to 180 degrees of abduction
in trained individuals.
CYBEX VR2 Owner's Manual
MUSCLES TRAINED
Exercise
Page 3-19