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It seems
everyone is trying to sell some workout routine with a
magic set and rep scheme. Some claim only low rep
schemes should be used, others claim anything under 10
reps is a waste of time, some even recommend repetition
schemes as high as 100! So what’s the deal? There is no
magic rep scheme. ALL rep schemes have merit and all
should be utilized in order to achieve maximal physique
development.
Low Reps
Low reps are typically defined as
being anywhere from 1-5. Low rep schemes place the
largest load on muscles because heavier weights can be
handled when performing fewer reps. Low rep schemes also
have the advantage of activating ALL fiber types,
including the slow twitch fibers! Many think high reps
are needed to activate slow twitch fibers, but that
isn’t so. Muscle fibers are recruited in order from
slow, to intermediate, to fast. When a heavy load is
being lifted, muscles recruit all the slow fibers first.
If the tension the created in the slow fibers is not
sufficient to support the load, intermediate fibers are
then recruited, and if they can’t cut it, the fast
twitch fibers are recruited.
Lower rep
schemes and heavier loads also better affect the
stimulation of myofibrillar (the actual proteins that
are responsible for contraction) protein synthesis than
any other rep scheme. Low rep lifting will yield great
strength gains, which will enable the use of more weight
in other rep ranges, thus overloading the muscle even
further & causing greater hypertrophy.
Moderate Reps
Moderate reps
are typically defined as being between 6 and 12 reps.
Moderate rep schemes are sort of the
“jack-of-all-trades, master of none.” They have many of
the benefits of high rep schemes and many benefits of
low rep schemes. In peer review studies, it is this rep
range that seems to consistently cause the most overall
hypertrophy. This is probably because the rep range is
low enough to allow use of heavy loads, but enough reps
are performed that the muscle is under tension for a
longer period of time than it would be in a low rep
range. This should then result in a greater hypertrophic
response.
High Reps
High reps are
typically defined as anything around or above 15 reps.
While low rep schemes stimulate all the fibers and
result in the best strength gains and moderate reps
schemes result in the most hypertrophy, high rep schemes
still have value. High repetitions cause massive
glycogen depletion during a workout. The body
compensates for that in the post workout period by
increasing the amount of glycogen muscles store. Since
glycogen is very hydrophilic, extra glycogen will pull
more water into muscle cells (about 2.7g water/gram of
glycogen). An increase in intracellular water is very
anabolic. Increased cell hydration induces increases in
protein synthesis and also causes cells to stretch.
Muscle cell stretching is one of the signals for
cellular growth. If stretching is forceful enough, it
can induce the release of growth factors. |
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So how is all
this information integrated into a routine? Consider a
chest workout as an example. The routine can be started
off with a compound movement for low reps using heavy
weights. Starting off in the low rep range allows
lifting the heaviest possible weights since not fatigued
at the beginning of a workout (if sets with heavy
weights/low reps were done at the end of a workout, not
nearly as much weight could be moved). Some form of
dumbbell or barbell press for 3-5 sets for 3-5 reps each
would be great for stimulating strength gains and
overloading muscle. Rest periods should last as long as
needed to recover and feel 100% mentally focused for
another set. Focus should be on moving as much weight as
possible during these sets.
Three to five
sets of a different pressing movement, aiming for a load
where 6-12 reps can be achieved, can follow the strength
sets. Muscles will be partially fatigued from low rep
exercise, so using a pressing movement that requires
less stabilization & balance would be ideal so focus can
be on moving the weights. Something like a Hammer
Strength press machine would be ideal. Hitting the lower
and higher ends of the rep range is a good idea. For
example, doing around 6 reps on the first set, reducing
the weight to perform 8 reps on the second set, 10 reps
on the third, and 12 reps on the final set. All the
benefits of this moderate rep range can be taken
advantage of by
performing sets in this manner. Rest periods between
these sets should be around 2-3 minutes. An isolation
exercise for 2-3 sets of high reps (15+ reps) should be
used to finish off the workout. Using an isolation
exercise ensures the chest will fatigue instead of
having shoulders or triceps failing first, which can
occur during pressing movements. Cable crossovers,
dumbbell flyes, cable flyes, or pec deck flyes would be
optimal for this high rep work. Rest periods between
sets should be 60-90 seconds MAX! Strive for a pump and
burn!
Layne Norton is an IFPA pro
natural bodybuilder, has a B.S. degree in Biochemistry,
and is a Ph.D. Candidate in Nutritional Science with
specialization in amino acid metabolism.
FP |
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