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CYBEX VR2 Owner’s Manual
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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
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Flexion/Abduction in External Rotation -
The anterior deltoid is primarily responsible
for flexion of the shoulder joint as well as
abduction of the shoulder joint when com
bined with 90 degrees of external rotation
(overhead press position). The middle deltoid
is a prime mover for shoulder abduction, how
ever, 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 compromising position for the
shoulder joint.
•
Range of Motion - Full normal abduction or flexion begins with the arm at the side in 0
degrees and ends in a vertical position overhead at 180 degrees. As the arm moves overhead
the direction of travel arcs upward, then inward toward the head.
•
Associated Muscles - Collectively, the scapular muscles are involved in the scapular
rotation that is key to scapulohumeral rhythm. This combined motion of the scapula and
the shoulder joint is required to achieve elevation of the arm overhead in any plane. The
rotator cuff muscles act as dynamic stabilizers during elevation of the arm. The triceps are
always involved in pressing movements as elbow extension is required. Due to the external-
ly rotated position, the posterior deltoid plays a stabilizing role at best and in many shoulder
structures would prove to be an antagonist to overhead movements.
The Positioning
•
Adjust the seat to align the handles with the top of the shoulders.
•
Check the weight to insure that the appropriate resistance has been selected. Body position
and control of the motion should never be compromised by excessive weight.
•
Grip either set of handles and position the elbows directly below the hands.
MUSCLES TRAINED
Exercise
Page 3-50
Summary of Contents for VR2
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Page 166: ...OVERHEAD PRESS SINGLE AXIS 4526 ...
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Page 186: ...FLY 4545 ...
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Page 190: ...SEATED LEG PRESS 4605 ...
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Page 194: ...4613 Leg Extension Total RLD LEG EXTENSION 4611 4612 4613 ...
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Page 198: ...PRONE LEG CURL 4616 4617 4618 4618 Prone Leg Curl Total RLD ...
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Page 206: ...4628 Seated Leg Curl Total RLD SEATED LEG CURL 4626 4627 4628 ...
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Page 222: ...4713 Back Extension Total RLD BACK EXTENSION 4711 4712 4713 ...
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