Nautilus SELECTTECH 552 - Manual (Page 8)

weight selection
Side 1 Side 2 Total dumbbell weight
Weight settings selected 20 lbs (9 kg) 30 lbs (13.6 kg) 25 lbs (11.4 kg)
Weight Difference 10 lbs (4.5 kg)
Weight Distribution 10 lbs (4.5 kg) 15 lbs (6.8 kg) 25 lbs (11.4 kg)
Weight offset + 5 lbs (2.27 kg)
WA R N I N G
A T T E N T I O N
D A N G E R
IMMEDIATE ACTION REQUIRED
C A U T I O N
Do not intentionally engage the locking mechanism
and attempt to lift the entire dumbbell via the grip.
The dumbbell should only be lifted by using the lift
handles molded into the base assembly.
WA R N I N G
A T T E N T I O N
D A N G E R
IMMEDIATE ACTION REQUIRED
C A U T I O N
If the dumbbell locking mechanism fails to perform
in accordance with the test procedure above,
do the following things:
1. Discontinue use of the product immediately until
proper service can be provided.
2. Contact your Nautilus® retailer or contact Nautilus,
Inc. directly by phone at 1-800-628-8458 for service.
Offset weight selection
As indicated above, proper selection for a given weight is
accomplished by selecting that weight number on both ends of the
dumbbell. For example: to select 20 lbs (9 kg), one must dial both
adjustment knobs on the dumbbell to the number 20. By selecting
the same number on both sides of the dumbbell, you will replicate
a common dumbbell, this is to say, a balanced dumbbell with equal
weight on both sides. While this is the most common form of weight
selection and will be used in the vast majority of workouts, the
Nautilus ® SelectTech ® Dumbbell offers a useful and unique workout
alternative known as offset weight selection. Offset weight selection
involves using a different weight setting on one side of the dumbbell
relative to the other. Doing so can be a powerful muscle development
tool during certain workouts, such as the biceps curl. The SelectTech ®
Dumbbell functions exactly the same way whether you have selected
balanced or offset weights. The only exception is that when you are
using offset weights, you must return the dumbbell to the base in the
same orientation that you removed it. When you have offset weight
selection the combination of weight plates selected will not be the
same on both sides of the dumbbell. You must therefore make certain
to return the dumbbell to the base in the same orientation in which
it was removed, in order for the weight plates to settle back into the
corresponding vacant slots in the dumbbell base.
Example of offset weight selection workout
Performed traditionally, dumbbell curls strengthen the biceps, but do
little for the forearm muscles that assist in supination and pronation
of the wrist. Supination and pronation are terms describing a rotating
motion of the wrist. For example, turning a doorknob and turning your
key in your car’s ignition are examples of supination and pronation.
Turning a doorknob clockwise would be the supination direction, while
counter-clockwise would be the pronation direction. Whether you are
training for a specific sport, or just training to become stronger and
improve activities of daily living, training your forearm muscles that
are involved in supination and pronation can be beneficial.
These dumbbells allow you to train differently than
traditional dumbbells. By using different weight settings on either
side of the dumbbells, you can use those supination/pronation
muscles during your curls. Using more weight on the thumb side of
the dumbbell will improve pronation strength, while more weight on
the little finger side will improve supination strength. Not only will
you be strengthening your biceps, but also you can become stronger in
activities involving rotation of the wrist!
The following example of a Biceps Curl using offset weight is a good
demonstration of the superior muscle development
provided by the SelectTech ® Dumbbell.
The dumbbell weight has been set to 20 lbs (9 kg) on one side and 30
lbs (13.6 kg) on the other. The total weight of the dumbbell is therefore
25 lbs (11.4 kg). This 25 lb (11.4 kg) dumbbell has the weight distributed
such that there are 10 lbs (4.5 kg) on one side and 15 lbs (6.8 kg) on the
other for a total of 25 lbs (11.4 kg).
With the dumbbell weight configured as defined above, the user should
grip the dumbbell with 20 lbs (9 kg) on the thumb side of the hand and
the 30 lbs (13.6 kg) on the little finger side of the hand.