Ten weeks of combined strength and endurance training resulted in significant .... The extensor muscles of the knee were selected as the muscle group to.
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AD-A261 059 /JI/iIIII //IIIII II/I/I/IhIII/III/I/
_______________________
COMBINED STRENGTH AND ENDURANCE TRAINING: FUNCTIONAL AND MORPHOLOGICAL ADAPTATIONS TO TEN WEEKS OF TRAINING
J. McCarthy
P. Griffth W. K. Prusaczyk H. W. Goforth A. Vailas
DTIC ELECTE MAR 0 9 1993
Report No. 92-26
10
3
8
0 93
93-04973 Jil i,•. 11ýl1 !L1l ýfjjj[1ll!!M
1
Approved for public release: distribution unlimited.
NAVAL HEALTH RESEARCH CENTER P.O. BOX 85122 SAN DIEGO, CALIFORNIA 92186-5122 NAVAL MEDICAL RESEARCH AND DEVELOPMENT COMMAND BETHESDA, MARYLAND
Combined Strength and Endurance Training: Functional and Morphological Adaptations
to Ten Weeks of Training
J.
McCarthy, H.W.
Ph.D.',
P.
Goforth,
Griffith, Jr.,
M.S.2,
W.K.
Ph.D. 3 , and A.
Prusaczyk,
Vailas,
Ph.D.2,
Ph.D.'
Report 92-26, supported by the Naval Medical Research and Development Command, Department of the Navy under work unit 62233N MM33P30.002-6005. The views expressed in this article are those of the author(s) and do not reflect the official policy or position of the Department of the Navy, the Department of Defense, or the U.S. Government. Approved for public release; distribution is unlimited.
Department of Physical Education and Dance. 2(?O) Ohs.,e'vahory Drive. University of Wisconsin. Madison. Wisconsin 53706
"
Geo-Centers. Inc.. 10903 Indian Head Highway. Fort Washingion. Maryland 20744
SNaval
Health Research Center. P.O Box 85122. San Diego. California 92186-5122
KEY FINDINGS
"* Ten
weeks of combined strength and endurance training resulted in significant increases in peak oxygen uptake, muscular strength and power, and muscle hypertrophy.
"*Functional
and morphological adaptations resulting from combined strength and endurance training are similar to those occurring when either strength or endurance training are performed alone.
9 Gains in strength/power development are not impaired or slow training at fast strength and endurance velocities, compared to strength-only training.
by combined contraction
"*Gains
in peak oxygen uptake are not inhibited by combined strength and endurance training, compared to endurance-only training.
"*Gains
in upper body strength and muscle hypertrophy are not inhibited when a three-day-per-week lower body endurance training program is added.
"• The
results from combined training studies appear to be influenced by training mode, intensity, volume, frequency, and the method of integration of the two training programs.
Accesion For NTIS CRA&I DHIC TAB U'anflounced
JL•.Adi~Jtion
Li
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.. .. .. .....
By Di:,tr• b ton I Avaiidibility Codes Avaii andcor Dist Spcclal
2
.... .
SUMMARY Problem Strength and endurance training are often combined by military personnel for tasks requiring multiple physical demands such as endurance, explosive
power.
While
the
literature
suggests
strength
strength,
development
inhibited when endurance and strength training programs are combined, information on their the U.S.
compatibility is
Navy SEALs must
limited and inconclusive.
also consider
within the limited physical
combining these
and
can
be
scientific
Groups such as
two forms
of exercise
training time available.
Obiective The
purpose
endurance
of
training
this
study
programs,
was
to
examine
individually
and
the
in
effects
of
combination,
strength
and
on performance
changes and associated muscle adaptations. Approach Sedentary groups:
males
(n=30)
strength-only
(STR),
endurance (COM). training
were
randomly
assigned to one of
endurance-only
(END),
or
consisted in
of
select
both the strength
upper
and
lower
body
resistance
strength,
(CT)
Strength exercises.
Subjects in
COM
and peak oxygen uptake (cycling) were
biopsies were taken from the vastus lateralis
computed tomography
and
and endurance training programs on the same day.
Anthropometric characteristics, measured;
strength
Subjects trained three days per week for ten weeks.
Endurance training consisted of continuous cycling for 50 min. engaged
three training
combined
muscle;
scans were performed before and after
and mid-thigh
training.
Results Groups
STR
and
COM
repetition maximum squat (6%,
9%);
in
14%)
peak
(23%,
lean body weight (3%,
muscle fiber area (24%, (12%,
showed
and flexor (7%, oxygen
uptake
22%)
significant
(p
