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The Effects of High-Load Versus Low-...

Sarellis, Sofoklis Demetrios.

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The Effects of High-Load Versus Low-Load Resistance Training on Isokinetic Knee Extensor and Flexor Peak Power, Vastus Intermedius, and Vastus Lateralis Muscle Thickness in Untrained Overweight and Obese Adults.

Record Type:	Electronic resources : Monograph/item
Title/Author:	The Effects of High-Load Versus Low-Load Resistance Training on Isokinetic Knee Extensor and Flexor Peak Power, Vastus Intermedius, and Vastus Lateralis Muscle Thickness in Untrained Overweight and Obese Adults./
Author:	Sarellis, Sofoklis Demetrios.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2020,
Description:	114 p.
Notes:	Source: Masters Abstracts International, Volume: 82-03.
Contained By:	Masters Abstracts International82-03.
Subject:	Health sciences. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28029024
ISBN:	9798664758016

The Effects of High-Load Versus Low-Load Resistance Training on Isokinetic Knee Extensor and Flexor Peak Power, Vastus Intermedius, and Vastus Lateralis Muscle Thickness in Untrained Overweight and Obese Adults.
Sarellis, Sofoklis Demetrios.

The Effects of High-Load Versus Low-Load Resistance Training on Isokinetic Knee Extensor and Flexor Peak Power, Vastus Intermedius, and Vastus Lateralis Muscle Thickness in Untrained Overweight and Obese Adults. - Ann Arbor : ProQuest Dissertations & Theses, 2020 - 114 p.

Source: Masters Abstracts International, Volume: 82-03.

Thesis (M.S.)--Arizona State University, 2020.

This item must not be sold to any third party vendors.

Sedentary behavior and excessive weight gain have been proven to deteriorate many characteristics of muscle. Low muscular power and mass with excess fat mass are risk factors for a multitude of chronic conditions and functional disabilities. Resistance training (RT) has long been accepted as a rehabilitative method of maintaining or enhancing muscular performance and composition. There are various methods of determining lower extremity muscular power; however, isokinetic dynamometry has emerged as one of the most accurate and reliable methods in clinical and research settings. Likewise, various methods exist for determining muscle thickness; however, many of those methods are expensive and can expose individuals to radiation. Ultrasonography has emerged as an accurate and reliable alternative to measuring lower extremity muscle thickness. The objective of this study was to assess the effects of high-load/low-volume (HLLV) and low-load/high-volume (LLHV) RT on isokinetic knee extensor and flexor peak power in sedentary, RT naive, overweight or obese men and women (Body Mass Index ≥ 25 kg/m2). Twenty-one subjects (n = 21) completed this study and were randomized into one of the following groups: control, a HLLV group that performed three sets of 5 repetitions for all exercises until volitional fatigue, and LLHV which performed three sets of 15 repetitions for all exercises until volitional fatigue. Subjects randomized to the RT groups performed full-body exercises routines on three non-consecutive days per week. Changes in isokinetic knee extensor and flexor peak power, quadriceps ultrasound muscle thickness, and right leg segment of dual-energy X-ray absorptiometry (DEXA) scans were measured before and after the 12-week RT intervention. There were no significant differences found in group, time or, group by time interactions for knee extensor and flexor peak power using isokinetic dynamometry. Other than a group interaction for vastus intermedius muscle thickness (P=0.008), no significant interactions or differences were observed for any of the other variables tested. Based on the results of this study, neither high- nor low-load RT resulted in significant differences between intervention groups in peak power of the knee extensors and flexor, muscle thickness changes of the vastus intermedius, and vastus lateralis and, in the right lower extremity segmented body composition measures using DEXA.

ISBN: 9798664758016Subjects--Topical Terms:

3168359
Health sciences.
Subjects--Index Terms:

High Load

The Effects of High-Load Versus Low-Load Resistance Training on Isokinetic Knee Extensor and Flexor Peak Power, Vastus Intermedius, and Vastus Lateralis Muscle Thickness in Untrained Overweight and Obese Adults.
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245 1 4 $a The Effects of High-Load Versus Low-Load Resistance Training on Isokinetic Knee Extensor and Flexor Peak Power, Vastus Intermedius, and Vastus Lateralis Muscle Thickness in Untrained Overweight and Obese Adults.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2020
300 $a 114 p.
500 $a Source: Masters Abstracts International, Volume: 82-03.
500 $a Advisor: Ofori, Edward.
502 $a Thesis (M.S.)--Arizona State University, 2020.
506 $a This item must not be sold to any third party vendors.
520 $a Sedentary behavior and excessive weight gain have been proven to deteriorate many characteristics of muscle. Low muscular power and mass with excess fat mass are risk factors for a multitude of chronic conditions and functional disabilities. Resistance training (RT) has long been accepted as a rehabilitative method of maintaining or enhancing muscular performance and composition. There are various methods of determining lower extremity muscular power; however, isokinetic dynamometry has emerged as one of the most accurate and reliable methods in clinical and research settings. Likewise, various methods exist for determining muscle thickness; however, many of those methods are expensive and can expose individuals to radiation. Ultrasonography has emerged as an accurate and reliable alternative to measuring lower extremity muscle thickness. The objective of this study was to assess the effects of high-load/low-volume (HLLV) and low-load/high-volume (LLHV) RT on isokinetic knee extensor and flexor peak power in sedentary, RT naive, overweight or obese men and women (Body Mass Index ≥ 25 kg/m2). Twenty-one subjects (n = 21) completed this study and were randomized into one of the following groups: control, a HLLV group that performed three sets of 5 repetitions for all exercises until volitional fatigue, and LLHV which performed three sets of 15 repetitions for all exercises until volitional fatigue. Subjects randomized to the RT groups performed full-body exercises routines on three non-consecutive days per week. Changes in isokinetic knee extensor and flexor peak power, quadriceps ultrasound muscle thickness, and right leg segment of dual-energy X-ray absorptiometry (DEXA) scans were measured before and after the 12-week RT intervention. There were no significant differences found in group, time or, group by time interactions for knee extensor and flexor peak power using isokinetic dynamometry. Other than a group interaction for vastus intermedius muscle thickness (P=0.008), no significant interactions or differences were observed for any of the other variables tested. Based on the results of this study, neither high- nor low-load RT resulted in significant differences between intervention groups in peak power of the knee extensors and flexor, muscle thickness changes of the vastus intermedius, and vastus lateralis and, in the right lower extremity segmented body composition measures using DEXA.
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650 4 $a Biomechanics. $3 548685
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653 $a Low Load
653 $a Muscle Thickness
653 $a Obese
653 $a Resistance Training
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690 $a 0575
690 $a 0648
710 2 $a Arizona State University. $b Exercise and Wellness. $3 2103403
773 0 $t Masters Abstracts International $g 82-03.
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