Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 22 for “"eccentric contractions"”.
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Neuromuscular characteristics of eccentric contractions of the knee extensors and their muscle damage profiles
… force with lower muscle activation during eccentric (ECC) than isometric (ISO) and concentric (CON) contractions (actions). Unaccustomed ECC exercise induces muscle damage represented by prolonged impairment of muscle function and delayed onset muscle soreness (DOMS), but also confers …
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The influence of set-repetition configuration in eccentric exercise on muscle damage and repeated bout effect
It is well known that maximal eccentric exercise induces muscle damage, especially when it is performed for the first time. However, muscle damage is attenuated in subsequent bouts of the same or similar exercise, which is known as the repeated bout effect. One of the factors affecting the …
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Age Related Differences in Motor Output Variability During Isometric, Concentric and Eccentric Quadriceps Femoris Muscle Contractions
… elderly individuals to produce maximum voluntary contractions (MVC) and control submaximum levels of force during continuous isometric, discrete isometric, discrete concentric and discrete eccentric contractions of the quadriceps femoris. Of particular interest was to model variability of force …
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Direct Comparison of Acute Responses to Isotonic Or Isokinetic Eccentric Muscle Action: Implications For Differential Outcomes In Skeletal Muscle Damage
… performed that isotonic compared to isokinetic eccentric contractions elicits a differential response in regards to surrogate markers of skeletal muscle damage. Purpose: To directly compare between isotonic- and isokinetic-type eccentric contractions for differences in markers of muscle damage. …
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Effects of Eccentric Contraction Duration on Muscle Strength, Power Production, Vertical Jump and Soreness
… research has investigated the effects of either eccentric-only training or comparing eccentric and concentric exercise on changes related to strength and power expression, but no research to date has investigated the impact of altering the duration of either the concentric or eccentric component …
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Pain assessment and possible mechanism of delayed onset muscle soreness
… reduced after the second than the first bout of eccentric exercise (Study 4). From these studies, DOMS was thought to be more associated with connective tissue than muscle fibre damage and inflammation. In Study 1, the relationship between pain level assessed by a visual analogue scale (VAS) and …
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Effect of a non-steroidal, anti-inflammatory drug (Indocin) on selected parameters of muscular function following concentric and eccentric work
Evidence from various studies indicates that eccentric contractions produce more post-exercise changes in muscular function than do concentric contractions. Delayed muscular soreness, the pain and tenderness present 1 or 2 days after exercise, is negatively correlated with muscular performance and …
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The effect of eccentric exercise velocity on selected measures of muscle function and soreness of the Human elbow flexors in untrained males and females
Eccentric contractions, where a muscle is repeatedly lengthened while generating torque, result in decreased muscle function and muscle soreness. This study was designed to determine whether there was a difference in muscle response of the elbow flexors from untrained subjects (n = 12) between a …
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Exercise induced damage to skeletal muscle and connective tissue
… tissue breakdown were studied following eccentric and concentric muscle contractions of the knee extensors (KE). Electrically stimulated eccentric contractions of the KE induced delayed onset muscle soreness (DOMS), a delayed increase in serum creatine kinase (CK) activity, and disruption …
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Quantification of eccentric load using accelerometer imbedded in GPS
… change of directions and stopping require eccentric contractions of leg muscles, potentially causing muscle damage and affecting athletic performance. Thus, it is important to monitor eccentric loading in games and training. A variable known as “eccentric index” (EI) purports to be a better …
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Effects of pulsed electromagnetic field therapy on symptoms associated with eccentric exercise-induced muscle damage
Unaccustomed exercise consisting of eccentric contractions induces muscle damage that is characterised by muscle weakness, soreness, swelling and increased muscle stiffness. These symptoms affect daily activities and athletic performance; therefore, interventions to attenuate the symptoms and …
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The Effects of Dha Supplementation on Markers of Inflammation and Muscle Damage Following an Acute Eccentric Exercise Bout
… damage and inflammation following an acute eccentric exercise bout. Methods: A double-blind placebo-controlled, study was performed using 41 healthy, untrained males aged 18-28 y who consumed either 2 g/d DHA or placebo (PL, corn oil) for 32 days. Supplements were consumed for 28 days prior …
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Exercise induced pain and damage in human skeletal muscle
Two types of dynamic muscle contractions have been compared to investigate their effects on muscle pain and damage in normal subjects. Damage was assessed by studying changes in isometric force generation, muscle enzyme loss, morphological changes and the patterns of radioisotope uptake. Delayed …
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Continuous Therapeutic Ultrasound Decreases Pain Perception and Increases Pain Threshold After Muscle Damage
… (treatment). All subjects performed 50 maximal eccentric contractions in both arms on a Biodex dynamometer, but only the non-dominate arm was measured. Criterion measures of isometric force production and serum creatine kinase activity were measured at baseline and peak damage. Muscle soreness …
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Effects of eccentric versus concentric resistance training in adults with Type 2 Diabetes
… of different muscle contraction types (e.g. eccentric, concentric) on physiological outcomes for this population are still unclear. This study investigated the effects of eccentric (ECC) versus concentric (CON) resistance training on blood markers, muscle strength, physical functional …
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Development of novel strategies to improve skeletal muscle repair and adaptation following eccentric exercise
Eccentric contractions, often required for participation in resistance training, as well as daily activities, can injure skeletal muscle. The repair of muscle damage is essential for effective remodeling, tissue maintenance, and initiation of beneficial adaptations post-exercise. We have previously …
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Effect of vibration treatment on symptoms associated with eccentric exercise-induced muscle damage [thesis]
Unaccustomed eccentric exercise results in delayed onset of muscle soreness (DOMS), loss of muscle strength, reduced range of motion (ROM) and swelling. Vibration treatment has been used in physiotherapy to reduce pain and oedema, and to facilitate the repair of injured tissue. This study tested …
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THE INFLUENCE OF LENGTH CHANGE SPEED AND DIRECTION ON DYNAMIC FUNCTION POTENTIATION IN FAST MOUSE MUSCLE
… or lengthening and peak dynamic (concentric or eccentric) forces were assessed at Lo. Stimulation increased peak concentric force at all frequencies (range: 19±1 to 30 ± 2%) but this increase was proportional to shortening speed, as were the related changes to concentric work/power (range: -15 ± …
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The effect of whey protein-polyphenol on the recovery of muscle function and strength following eccentric exercise- the myogenic and neural contributions to eccentric exercise.
Maximal eccentric contractions result in noteworthy declines in force-generating capacity due to the high intramuscular forces generated in lengthened muscle, especially in individuals unaccustomed to such exercise. Despite the typical characteristics of exercise-induced muscle damage (EIMD), the …
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