Summary
While aerobic training and, to a lesser degree, resistance
training are known to reduce blood concentrations of lowdensity
lipoprotein cholesterol (LDL-C), little is known about
the effects of a combination of aerobic and resistance training
on LDL-C concentrations. The aim of the investigation
was to examine the effects of 16 weeks of no exercise, aerobic
training or a combination of aerobic and resistance training
on lowering blood concentrations of LDL-C.
Thirty-eight healthy, previously untrained men (mean
age: 25 years and six months) with borderline high blood
LDL-C concentrations volunteered to participate in this
investigation. Each subject’s blood LDL-C concentrations
were measured following a nine- to 12-hour fasting period
and prior to any exercise. Aerobic training consisted of exercise
using a combination of treadmills, rowers, steppers and
cycle ergometers. Combined aerobic and resistance training
consisted of a combination of aerobic training at 60%
of heart rate maximum, and resistance training using eight
prescribed exercises performed for two sets of 15 repetitions
at 60% of the estimated one-repetition maximum (1-RM).
The no-exercise group was found to have had no significant
(p ≤ 0.05) change in blood LDL-C concentrations (from
4.12 ± 0.27 to 4.21 ± 0.42 mmol.l-1), whereas the aerobic
training and combined training groups showed significant
and similar (p = 0.123) decreases in blood LDL-C concentrations
(from 3.64 ± 2.87 to 2.87 ± 0.64 mmol.l-1 and from
4.39 ± 1.04 to 3.23 ± 0.71 mmol.l-1, respectively). This investigation
indicates that a larger dose of aerobic exercise does
not necessarily equate to a greater improvement in LDL-C
concentrations if the lost aerobic exercise time is replaced with resistance exercise.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:tut/oai:encore.tut.ac.za:d1001731 |
| Date | 02 November 2009 |
| Creators | Shaw, I, Shaw, BS, Krasilshchikov, O |
| Publisher | Cardiovascular Journal of Africa |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Text |
| Format | |
| Rights | Cardiovascular Journal of Africa |
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