Compare
the strength building exercise principles in use today.
Top
coaches, trainers, athletes, doctors, and physical therapists agree
that
Olle
is superior, 1t'8 called Isokinetics.
The principle
of
isokinetics
i8
relative!y new. It's the basis
of
an
extraordinary new line
cf
strength building equipment for athletics, physical
therapy, and consumcr use. Your
bady
consists ofhundreds
of
different
museies. Depending upan mechanical aud skeletalleverage, same are naturally
stronger than atllers.
No
matter how strang your strangest
l11uscles
are, tiley are
not uniform!y
strang
in every position.
Ta
continually excel and be a consistcl1t
winner in any event,
one
needs to develop maximum strength and power. Let's
compare
thc
different types
of
exercise pro grams.
I.
Isometrie Prineiplc
The
oldest
and
simplest exercise
principle is isometrics.
It
involves
applying as
much
musclliar strength as
possible either pushing or plllling an
im1TIovable object.
As
tension is
increased and maintainec1 for short
periods
of
time, one strengthens his
mllscles
at
that given point, but strength
throughollt
the
range
of
motion is
impossible and lack
of
motivation soon
tenninates
most
individllal's program.
AppUed
:EUarf.
2.
Isotonic Principle
This
form
of
exercise involves
physically lifting or plllling an object to a
predetermined position and then retul11ing
tbe object to its original position,
i.e.
lifting a barbeI!.
One
is limited to the
maximum
weight
he can move at his
weakest
angle throughout the range
of
motion. This is a seriolls drawback.
Because
of
variations in skeletal leverage,
you
do
not
have equal strength
in
aH
positions throllghollt thc rull range ofa11
excrcises
YOll
perform. Thc exercise
movemcnt
is
usually crratic and unstable.
Isotonic exercises do not
n1ake
any
allowance for fatigue.
Ul1tb*llJh:!g
JbI:.h-t.!ute~
T
Speed
Irngub.r
ud
Uft,tabte
3.
Variable
resistance weight
machines
and
cam
dcvices
Because
ofthc
limitations
of
iso tonic resistance as shown
in
2, some
weight m3chines have tried to get variable
resistance by adding some mechanical
features.
Several weight machines add an
off-center lever
bar
that makes the weight
more as one pushes the bar through the
range
of
motion. This has limitcd value as
it increases resistance on only a few
exercises such as squats, bench press, and
sitting leg press where
range
of
motion
gets stronger throughout tbe extended
movement. However, this principle is
DO
good when the middle
ofthe
range is
strongest as in exercises such as curls,
knee extensions,
und those utilizing the
triceps and lats. Cam devices were
...
developed
to
try to solve this dilemma.
They
made
only a slight increase
in
resistance for the middle range, but were
no help in
the stronger extended ranges.
In
both instances, because
a11
individuals do not have the same skeletal
leverage, there ean be no allowance in
rcsistance for the fatigue factor.
It
is not
recommended that you use HRFS (High
Resistance Fast Speed) with these
machines as it can be velY dangerous.
Only with the Isokinetic resistance
can
all the factors be
conected
easily and
safely.
Only with Isokinetic can
you
achieve this strength/aerobic workout.
4.
Isokinetic Principlc
The
most advaneed
fonn
of
strength
building today involves the principle
of
isokinetics. When a true isokinetic
exerciser such as the Mini-Gym is
used, resistance equal to the force
being exerted
is
instantly and
automatically developed throughout
the full range
of
the exercise being
performed. In other words,
if
an
exercise involving your wrist is used
and you
eXe!1
live pounds
of
pull
with
YOUf
hand, the
Mini-Gym's
paten ted isokinetic exercise system
will automatically develop exactly
five pounds
of
resistance. And,
if
during some pOliion
of
the same
exercise, musc1es in the
ann
are
placed in a position so
50 pounds
of
pu11
or pllsh is being exerted at any
given moment, a Mini-Gym
Isokinetic exercise unit will instantly
and automatically adjllst
itself
to
50
pounds
of
resistance.
With
the Mini-
Gym, the amount
of
isokinetic
resistance created always equals the
amount
of
force being applied
pound-
for-pound, ounce-fm·-ounce.
There is no other type
of
exercise
which allows individuals to
work
at
HRFS
(High Resistance
Fast
Speeds).
Working
at fast speeds with
heavy
weights is very dangerous.
Working
with light weights at fast speeds is
of
little value because tbe resistance
becomes a ballistic missile. In
comparison, Mini-Gyms provide
hundreds
of
pounds
of
resistance in
less than
011e
second, and
one
may
do
20 or 100 repetitions in rapid
sueeession without the danger
of
falling weights. Lowering
ofweights
(eccentrie contraction)
1S
great
for
"Body
Builders",
but
there are few,
if
any, athletic events
where
on
needs
the strength
"coming
down".
Nevertheless, the
same
musc1e
groups
are used positively, as weIl as
negatively.
Isokinetic resistance will
not replace weight training,
but
it
will do
much
for you that weights
can't
do.
lIowe
.....
'
ThroaC.
FII11R
..
,.
CoatroU
...
8
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...
AppU'"
Elfort
•
...
MII.hIaC
Re.bha.e
...
Instruction
Manual
7