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Effect of Concurrent Sprint Interval and Resistance Training on Measures of Strength, Power, and Aerobic Performance
, 2013
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“Do not go where the path may lead; go instead where there is no path and leave a trail.”
, 2010
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A SIX WEEK MODIFIED SPRINT INTERVAL TRAINING PROGRAM INCORPORATING EXTENDED EXERCISE BOUTS DOES NOT INCREASE MAXIMAL CARDIAC OUTPUT
, 2013
"... A six week modified sprint interval training program incorporating extended exercise bouts does not increase maximal cardiac output ..."
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A six week modified sprint interval training program incorporating extended exercise bouts does not increase maximal cardiac output
UNIVERSITY OF PRETORIA Study leader:
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Publications arising from the work undertaken for this thesis:
, 2014
"... I certify that except where due acknowledgement has been made, the work is that of the author alone; the work has not been submitted previously, in whole or in part, to qualify for any other academic award; the content of the thesis/project is the result of work which has been carried out since the ..."
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I certify that except where due acknowledgement has been made, the work is that of the author alone; the work has not been submitted previously, in whole or in part, to qualify for any other academic award; the content of the thesis/project is the result of work which has been carried out since the official commencement date of the approved research program; any editorial work, paid or unpaid, carried out by a third party is acknowledged; and, ethics procedures and guidelines have been followed.
Biological Characteristics of Structural and Functional Remodelling in Skeletal Muscle: Effect of Exercise
, 2013
"... Abstract For more than one and a half century, the effect of locomotory activity on skeletal muscle structure and function has been studied. It is clear that these changes depend on the mode of activity. Resistance and endurance exercise training differ in their intensity and duration as well as ef ..."
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Abstract For more than one and a half century, the effect of locomotory activity on skeletal muscle structure and function has been studied. It is clear that these changes depend on the mode of activity. Resistance and endurance exercise training differ in their intensity and duration as well as effects on metabolic pathways, structures of skeletal muscle, protein synthesis and degradation rate, neuromuscular junctions and muscle spindles. The purpose of this review was to compare differences and similarities in structural-functional rearrangements in skeletal muscle in endurance and resistance training and the effect of these changes on endurance and strength capacity. The main purpose of the study was to compare changes in mitochondrial and myofibrillar compartments and also changes in neuromuscular junctions in extra-and intrafusal muscle fibers. The comparison of morpho-functional changes in different skeletal muscle fiber types may help an 252 Teet Seene and Priit Kaasik exercise biologist, sport physician, endurance and strength specialist to better understand the nature of specificity of different training modes on the functional capacity of an organism and build up exercise training strategies for both recreational and top athletes.
doi:10.4061/2011/234696 Research Article Effects of Tai Chi Training on Antioxidant Capacity in Pre- and Postmenopausal Women
, 2011
"... Copyright © 2011 Attakorn Palasuwan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The risk of oxidative stress-related metab ..."
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Copyright © 2011 Attakorn Palasuwan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The risk of oxidative stress-related metabolic diseases increases with menopause and physical inactivity. We hypothesized that an 8-week Tai Chi (TC) training program (2 sessions in class; 2 sessions at home; 1-1:15/session) would improve antioxidant capacity and reduce cardiovascular risks in both pre- (n = 8) and postmenopausal (n = 7) sedentary women. Selected measures of physical fitness and blood parameters were analyzed before and after the program. Besides the well-known effects of TC on balance, flexibility, and maximum leg extensor strength, TC (1) increased erythrocyte glutathione peroxidase activity—an aerobic training-responsive antioxidant enzyme—and plasma total antioxidant status and (2) decreased plasma total homocysteine, a cardiovascular risk marker. In addition to being a low-velocity, low-impact, and relatively safe, TC is a suitable physical activity design for pre- and postmenopausal women to increase antioxidant defenses. Investigating breathing effects during TC movements would be an interesting area for further research in diseases prevention. 1.
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, 2012
"... The aim of this review was to examine the mechanisms by which physical activity and inactivity modify muscle fatigue. It is well known that acute or chronic increases in phys-ical activity result in structural, metabolic, hormonal, neural, and molecular adaptations that increase the level of force o ..."
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The aim of this review was to examine the mechanisms by which physical activity and inactivity modify muscle fatigue. It is well known that acute or chronic increases in phys-ical activity result in structural, metabolic, hormonal, neural, and molecular adaptations that increase the level of force or power that can be sustained by a muscle. These adap-tations depend on the type, intensity, and volume of the exercise stimulus, but recent studies have highlighted the role of high intensity, short-duration exercise as a time-efficient method to achieve both anaerobic and aerobic/endurance type adaptations.The factors that determine the fatigue profile of a muscle during intense exercise include muscle fiber com-position, neuromuscular characteristics, high energy metabolite stores, buffering capacity, ionic regulation, capillarization, and mitochondrial density. Muscle fiber-type transformation during exercise training is usually toward the intermediate type IIA at the expense of both type I and IIx myosin heavy-chain isoforms. High-intensity training results in increases of both glycolytic and oxidative enzymes, muscle capillarization, improved phosphocreatine resynthesis and regulation of K+, H+, and lactate ions. Decreases of the habitual activ-ity level due to injury or sedentary lifestyle result in partial or even compete reversal of
