CYBEX VR2, Owner'S And Service Manual

Page: 84 / 230

The Machine
• Range of Motion Adjustment - The seat adjustment of
the overhead press serves to determine start position and
as a range of motion limit.
• Plane of Motion - The handles are angled to allow opti-
mum average wrist position throughout the movement.
The “barbell” or horizontal position encourages motion
in the frontal plane (abduction). The neutral or parallel
handles encourage motion in the sagittal plane (flex-
ion). Motion in the sagittal plane (pressing in the front)
is considered more functional and safer for the overhead
press and is just as (if not more) effective for stimulation
of the desired muscles.
• Variable Resistance - A cam provides appropriately
varying resistance that is maximal at the end of the
motion where the body’s mechanical advantage
increases.
• 10 to 205 Pounds by Fives - The top plate provides a minimum weight of ten pounds.
Subsequent plates in the weight stack are twenty pounds each. Three “slide-on” five pound
incremental plates are securely positioned for easy access and effortless addition thereby
providing 10 to 205 pounds in five pound increments.
The Shoulders
• Flexion/Abduction in External Rotation -
The anterior deltoid is primarily responsible for
flexion of the shoulder joint as well as abduc-
tion of the shoulder joint when combined with
90 degrees of external rotation (overhead press
position). The middle deltoid is a prime mover
for shoulder abduction, however, it’s level of
involvement diminishes as the shoulder is
externally rotated and the middle fibers are
moved posteriorly. The actual degree of middle
deltoid involvement varies with the user’s
individual deltoid structure. The combined
positions of external rotation to 90 degrees and
abduction to 90 degrees create the most com-
promising position for the shoulder joint.
MUSCLES TRAINED
Exercise
Page 3-53
Overhead Press - Single Axis
CYBEX VR2 Owner’s Manual