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JOURNAL
OF
SPORTS SCIENCE &
MEDICINE
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Research
article
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CARDIORESPIRATORY CHARACTERISTICS AND CHOLESTEROL RESPONSES TO A SINGLE SESSION OF HEAVY LEG PRESS EXERCISE |
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Zoe K. Pafili, Gregory C. Bogdanis 
and Maria Maridaki |
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Department of Sports Medicine and Biology of Physical Activity, Faculty of Physical Education and Sports Sciences, University of Athens, Greece. |
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© Journal of Sports Science and Medicine (2010) 9, 580 - 586 |
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| ABSTRACT | |||
| The effect of resistance exercise on blood lipids is not clear
yet. The purpose of this study was to examine the cholesterol responses
to a heavy resistance leg press exercise emphasizing on the eccentric movement
24 and 48 hours following exercise and to quantify the cardiorespiratory
responses of the exercise bout in an attempt to clarify the exercise characteristics
that may be responsible for the effects of heavy resistance exercise on
blood lipids. Nine healthy, untrained male volunteers aged 27.2 ± 1.1 yrs
(76.2 ± 2.5 kg, 1.79 ± 0.02 m) performed a session of heavy RE emphasizing
on the eccentric movement consisting of eight sets of inclined leg presses
at six repetition maximum with 3-min rest intervals. Venous blood samples
were obtained at rest (control) and 24 and 48 hours following exercise.
Average VO2 at rest was 4.0 ± 0.4 ml·min-1·kg-1,
during exercise 19.6 ± 0.2 ml·min-1·kg-1 and during
the 180 sec recovery period between sets 12.5 ± 0.2 ml·min-1·kg-1.
RER values decreased with the progression of the exercise and were significantly
lower during the last four sets compared with the first four sets of the
exercise session. Resting heart rate was 67 ± 2 bpm, and maximum heart rate
during exercise was 168 ± 1 bpm. Serum creatine kinase was significantly
elevated on day 1 (1090 ± 272 U·L-1, p < 0.03) and peaked on day 2 (1230
± 440 U·L-1 p < 0. 01). Total cholesterol, HDL cholesterol and calculated
LDL cholesterol concentration did not change significantly following with
exercise. This protocol of heavy resistance exercise has no effect on TC
or cholesterol sub-fraction concentration 24 and 48 hours following exercise
which may be due to the low energy expenditure of the exercise and/or to
the gender of the participants.
Key words: Muscle damage, energy expenditure, total cholesterol, HDL, oxygen uptake. |
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