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Isokinetic and muscle damage

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https://www.readbyqxmd.com/read/27768503/effect-of-alcohol-consumption-on-recovery-from-eccentric-exercise-induced-muscle-damage-in-females
#1
Yanita McLeay, Stephen R Stannard, Toby Mundel, Andrew Foskett, Matthew Barnes
This study was designed to investigate the effects of alcohol consumption on recovery of muscle force when consumed immediately post-exercise in young females. Eight young women completed 300 maximal eccentric actions of the quadriceps femoris muscle on an isokinetic dynamometer on two occasions in a randomized, cross-over design after which an alcoholic beverage (0.88g ethanol/kg body weight) or an iso-caloric placebo was consumed. Maximal isokinetic (concentric and eccentric) torque and isometric tension produced across the knee were measured in both the exercised and control leg pre-damage, 36h-post, and 60h-post damage...
October 21, 2016: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/27677023/validation-of-upper-limb-motor-assessment-tasks-using-a-rehabilitation-robot-in-healthy-children
#2
Stéphanie Dehem, Thierry Lejeune, Gaëtan Stoquart, Christine Detrembleur, Anne Renders, Martin Edwards, Charlotte Clarinval, Cécile Frognet, Isaline Brouwers, Vincenza Montedoro, Daniel Galinski
OBJECTIVE: To validate, establish norms and evaluate the reproducibility of upper limb motor assessment tasks using REAplan in healthy children. REAplan is a rehabilitation robotic device allowing upper limb mobilization in the horizontal plane. MATERIAL/PATIENTS AND METHODS: Forty-nine healthy children between six and twelve years participated in this study. Each child was assessed clinically and with REAplan, and twelve children were assessed twice. Elbow flexor and extensor muscles force were assessed with an isometric dynamometer Microfet II...
September 2016: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/27676836/isokinetic-hip-in-soccer-players-moroccan-experience-about-36-cases
#3
Karima Belhaj, Soumia Meftah, Siham Zahi, Fatima Lmidmani, Abdellatif Elfatimi
OBJECTIVE: Isokinetic evaluation allows accurate and reproducible measurement of dynamic muscle strength. It has several application areas, especially in sports, it allows the evaluation, rehabilitation and re-entrainment. It is rarely used for the hip joint. The objective of this study was to report the isokinetic profile of the abductor and adductor muscles of the hip in Moroccan professional players, while comparing players with a history of groin for those without medical history at the hip...
September 2016: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/27632383/differences-in-post-exercise-t2-relaxation-time-changes-between-eccentric-and-concentric-contractions-of-the-elbow-flexors
#4
Eisuke Ochi, Yosuke Tsuchiya, Kazunori Nosaka
PURPOSE: This study compared maximal eccentric (ECC) and concentric (CON) contractions of the elbow flexors for changes in transverse relaxation time (T2) and indirect markers of muscle damage. METHODS: Twelve young men performed five sets of six maximal isokinetic (30°/s) ECC with one arm followed by CON with the other arm. Magnetic resonance images to assess T2 and cross-sectional area (CSA) of biceps brachii, brachialis, and brachioradialis, and measurements of maximal voluntary isometric contraction (MVC) torque, range of motion (ROM), and muscle soreness were taken before, immediately after, and 1, 3, and 5 days after each exercise...
September 8, 2016: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/27468258/post-exercise-branched-chain-amino-acid-supplementation-does-not-affect-recovery-markers-following-three-consecutive-high-intensity-resistance-training-bouts-compared-to-carbohydrate-supplementation
#5
Wesley C Kephart, Petey W Mumford, Anna E McCloskey, A Maleah Holland, Joshua J Shake, C Brooks Mobley, Adam E Jagodinsky, Wendi H Weimar, Gretchen D Oliver, Kaelin C Young, Jordan R Moon, Michael D Roberts
BACKGROUND: Amino acid supplementation has been shown to potentially reduced exercise-induced muscle soreness. Thus, the purpose of this study was to examine if branched chain amino acid and carbohydrate (BCAACHO) versus carbohydrate-only sports drink (CHO) supplementation attenuated markers of muscle damage while preserving performance markers following 3 days of intense weight training. METHODS: Healthy resistance-trained males (n = 30) performed preliminary testing (T1) whereby they: 1) donated a baseline blood draw, 2) performed knee extensor dynamometry to obtain peak quadriceps isometric and isokinetic torque as well as electromyography (EMG) activity at 60°/s and 120°/s, and 3) performed a one repetition maximum (1RM) barbell back squat...
2016: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/27434079/neuromuscular-changes-and-damage-after-isoload-versus-isokinetic-eccentric-exercise
#6
Valentin Doguet, Kazunori Nosaka, Mathieu Plautard, Raphaël Gross, Gaël Guilhem, Arnaud Guével, Marc Jubeau
PURPOSE: This study compared the effects of isoload (IL) and isokinetic (IK) knee extensor eccentric exercises on changes in muscle damage and neuromuscular parameters to test the hypothesis that the changes would be different after IL and IK exercises. METHODS: Twenty-two young men were paired based on their strength and placed to IL (N = 11) or IK (N = 11) group. IL group performed 15 sets of 10 eccentric contractions with a 150% of pre-determined 1-RM load. IK group performed 15 sets of a number of maximal eccentric contractions matched set-by-set for the total amount of work and mean angular velocity with the IL group...
July 18, 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27054353/effects-of-traditional-judo-training-session-on-muscle-damage-symptoms
#7
Daniele Detanico, Juliano Dal Pupo, Emerson Franchini, David Fukuda, Saray G Dos Santos
BACKGROUND: This study aimed to analyze the acute effects of a judo training session on muscle strength, delayed-onset muscle soreness (DOMS), and serum creatine kinase (CK) activity. METHODS: Ten male judo athletes participated in this study and performed a 90 min traditional judo training session. The following measurements were performed before and 48 hours after the training: shoulder external/internal rotation isokinetic torque, countermovement jump (CMJ), DOMS, and blood draw for serum CK analysis...
April 7, 2016: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/26907841/differential-effects-of-unilateral-concentric-vs-eccentric-exercise-on-the-dominant-and-nondominant-forearm-flexors
#8
Travis W Beck, Xin Ye, Nathan P Wages
The purpose of this study was to compare the electromyographic (EMG) intensity patterns after unilateral concentric vs. eccentric exercise in the dominant (DOM) and nondominant (NONDOM) forearm flexors. Twenty-six men (mean ± SD: age, 24.0 ± 3.7 years) volunteered to perform a maximal isometric muscle action of the DOM and NONDOM forearm flexors before (PRE) and immediately after (POST) a series of maximal concentric isokinetic or maximal eccentric isokinetic muscle actions of the DOM forearm flexors. The concentric isokinetic and eccentric isokinetic muscle actions were performed on separate days that were randomly ordered...
March 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/26729210/acute-effects-of-contract-relax-cr-stretch-versus-a-modified-cr-technique
#9
Anthony D Kay, Steven Dods, Anthony J Blazevich
PURPOSE: Contract-relax (CR) stretching increases range of motion (ROM) substantively, however its use in athletic environments is limited as the contractions performed in a highly stretched position require partner assistance, are often painful, and may induce muscle damage. Therefore, the acute effects of performing the contractions 'off stretch' in the anatomical position [stretch-return-contract (SRC)] were compared with traditional CR stretching in 14 healthy human volunteers. METHODS: Passive ankle joint moment and dorsiflexion ROM were recorded on an isokinetic dynamometer with electromyographic monitoring of the triceps surae, whilst simultaneous real-time motion analysis and ultrasound imaging recorded gastrocnemius medialis muscle and Achilles tendon elongation...
March 2016: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/26660557/muscle-damage-and-inflammation-after-eccentric-exercise-can-the-repeated-bout-effect-be-removed
#10
Nikos V Margaritelis, Anastasios A Theodorou, Vasilios Baltzopoulos, Constantinos N Maganaris, Vassilis Paschalis, Antonios Kyparos, Michalis G Nikolaidis
The current consensus in exercise physiology is that the repeated bout effect always appears after few eccentric exercise sessions. This is the first attempt to challenge this tenet, by exploiting specificity in muscle plasticity. More specifically, we examined whether the opposing adaptations in muscle induced after concentric and eccentric exercise can attenuate and/or remove the repeated bout effect. Seventeen young men were randomly assigned into one of the following groups: (1) the alternating eccentric-concentric exercise group; and (2) the eccentric-only exercise group...
December 2015: Physiological Reports
https://www.readbyqxmd.com/read/26644696/the-effects-of-a-strategic-strength-resistance-exercise-program-on-the-isokinetic-muscular-function-of-the-ankle
#11
Kyoung-Kyu Jeon, Tae-Young Kim, Sang-Ho Lee
[Purpose] The purpose of this study was to investigate the effects of a strategic strength resistance exercise program on the isokinetic muscular function of the ankle joint. [Subjects] This study included 22 males in their twenties who were diagnosed with functional injury of the ankle joint. [Methods] To strengthen plantar flexion and dorsiflexion of the ankle joint, 8 weeks of weight, resistance band, and plyometric training, and training using props were performed. [Results] A medical examination by interview indicated that pain, swelling, instability, running, and support capacity of the ankle joint significantly improved with the strategic strength resistance exercise program...
October 2015: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/26578852/effects-of-powdered-montmorency-tart-cherry-supplementation-on-an-acute-bout-of-intense-lower-body-strength-exercise-in-resistance-trained-males
#12
RANDOMIZED CONTROLLED TRIAL
Kyle Levers, Ryan Dalton, Elfego Galvan, Chelsea Goodenough, Abigail O'Connor, Sunday Simbo, Nicholas Barringer, Susanne U Mertens-Talcott, Christopher Rasmussen, Mike Greenwood, Steven Riechman, Stephen Crouse, Richard B Kreider
BACKGROUND: The purpose of this study was to examine whether short-term ingestion of a powdered tart cherry supplement prior to and following intense resistance-exercise attenuates muscle soreness and recovery strength loss, while reducing markers of muscle damage, inflammation, and oxidative stress. METHODS: Twenty-three healthy, resistance-trained men (20.9 ± 2.6 yr, 14.2 ± 5.4% body fat, 63.9 ± 8.6 kg FFM) were matched based on relative maximal back squat strength, age, body weight, and fat free mass...
2015: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/26523661/assessment-of-muscle-pain-induced-by-elbow-flexor-eccentric-exercise
#13
Wing Yin Lau, Anthony J Blazevich, Michael J Newton, Sam Shi Xuan Wu, Kazunori Nosaka
CONTEXT: Delayed-onset muscle soreness (DOMS) is a common muscle pain that many people experience and is often used as a model of acute muscle pain. Researchers have reported the effects of various interventions on DOMS, but different DOMS assessment protocols used in these studies make it difficult to compare the effects. OBJECTIVE: To investigate DOMS characteristics after elbow-flexor eccentric exercise to establish a standardized DOMS assessment protocol. DESIGN: Descriptive laboratory study...
November 2015: Journal of Athletic Training
https://www.readbyqxmd.com/read/26446307/prophylactic-effects-of-sauna-on-delayed-onset-muscle-soreness-of-the-wrist-extensors
#14
Peanchai Khamwong, Aatit Paungmali, Ubon Pirunsan, Leonard Joseph
BACKGROUND: High-intensity of exercise or unaccustomed eccentric exercise can cause the phenomenon of Exercise-Induced Muscle Damage (EIMD) which usually results in cramps, muscle strain, impaired muscle function and delayed-onset muscle soreness. OBJECTIVES: This study investigated the prophylactic effects of sauna towards the symptoms associated with muscle damage from eccentric exercises of wrist extensor muscle group. PATIENTS AND METHODS: A total of twenty-eight subjects (mean age 20...
June 2015: Asian Journal of Sports Medicine
https://www.readbyqxmd.com/read/26424922/reduced-susceptibility-to-eccentric-exercise-induced-muscle-damage-in-resistance-trained-men-is-not-linked-to-resistance-training-related-neural-adaptations
#15
X Ye, T W Beck, N P Wages
The purpose of this study was to examine the acute effects of maximal concentric vs. eccentric exercise on the isometric strength of the elbow flexor, as well as the biceps brachii muscle electromyographic (EMG) responses in resistance-trained (RT) vs. untrained (UT) men. Thirteen RT men (age: 24 ± 4 years; height: 180.2 ± 7.7 cm; body weight: 92.2 ± 16.9 kg) and twelve UT men (age: 23 ± 4 years; height: 179.2 ± 5.0 cm; body weight: 81.5 ± 8.6 kg) performed six sets of ten maximal concentric isokinetic (CON) or eccentric isokinetic (ECC) elbow flexion exercise in two separate visits...
September 2015: Biology of Sport
https://www.readbyqxmd.com/read/26377678/experimental-knee-pain-impairs-submaximal-force-steadiness-in-isometric-eccentric-and-concentric-muscle-actions
#16
David A Rice, Peter J McNair, Gwyn N Lewis, Jamie Mannion
INTRODUCTION: Populations with knee joint damage, including arthritis, have noted impairments in the regulation of submaximal muscle force. It is difficult to determine the exact cause of such impairments given the joint pathology and associated neuromuscular adaptations. Experimental pain models that have been used to isolate the effects of pain on muscle force regulation have shown impaired force steadiness during acute pain. However, few studies have examined force regulation during dynamic contractions, and these findings have been inconsistent...
2015: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/26319562/low-intensity-eccentric-contractions-of-the-knee-extensors-and-flexors-protect-against-muscle-damage
#17
Min-Ju Lin, Trevor Chung-Ching Chen, Hsin-Lian Chen, Bo-Han Wu, Kazunori Nosaka
This study investigated the magnitude and duration of the protective effect of low-intensity eccentric contractions (LowEC) against damage induced by maximal eccentric contractions (MaxEC) of the knee flexors (KF) and extensors (KE). Young men were assigned to 8 experimental groups and 2 control groups (n = 13/group); the experimental groups performed LowEC of KF or KE 2 days (2d), 1 week (1wk), 2 weeks (2wk), or 3 weeks (3wk) before MaxEC, while the control groups performed MaxEC of KF or KE without LowEC...
October 2015: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/26248491/comparison-of-abdominal-wall-morbidity-between-medial-and-lateral-row-based-deep-inferior-epigastric-perforator-flap
#18
COMPARATIVE STUDY
Hirokazu Uda, Yoko Katsuragi Tomioka, Syunji Sarukawa, Ataru Sunaga, Yasusih Sugawara
INTRODUCTION: Although deep inferior epigastric perforator (DIEP) flap is associated with decreased abdominal morbidity, motor nerve damage during flap elevation cannot be ignored. We compared abdominal morbidity after elevation of DIEP flap with lateral row perforators (L-DIEP) and medial row perforators (M-DIEP) to determine the perforators associated with less abdominal morbidity. METHODS: Women who underwent breast reconstruction with DIEP flaps (n = 49) were included in this study...
November 2015: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/26205545/the-acute-response-of-pericytes-to-muscle-damaging-eccentric-contraction-and-protein-supplementation-in-human-skeletal-muscle
#19
Michael De Lisio, Jean Farup, Richard A Sukiennik, Nicole Clevenger, Julian Nallabelli, Brett Nelson, Kelly Ryan, Stine K Rahbek, Frank de Paoli, Kristian Vissing, Marni D Boppart
Skeletal muscle pericytes increase in quantity following eccentric exercise (ECC) and contribute to myofiber repair and adaptation in mice. The purpose of the present investigation was to examine pericyte quantity in response to muscle-damaging ECC and protein supplementation in human skeletal muscle. Male subjects were divided into protein supplement (WHY; n = 12) or isocaloric placebo (CHO; n = 12) groups and completed ECC using an isokinetic dynamometer. Supplements were consumed 3 times/day throughout the experimental time course...
October 15, 2015: Journal of Applied Physiology
https://www.readbyqxmd.com/read/26043222/recovery-kinetics-of-knee-flexor-and-extensor-strength-after-a-football-match
#20
RANDOMIZED CONTROLLED TRIAL
Dimitrios Draganidis, Athanasios Chatzinikolaou, Alexandra Avloniti, José C Barbero-Álvarez, Magni Mohr, Paraskevi Malliou, Vassilios Gourgoulis, Chariklia K Deli, Ioannis I Douroudos, Konstantinos Margonis, Asimenia Gioftsidou, Andreas D Flouris, Andreas D Fouris, Athanasios Z Jamurtas, Yiannis Koutedakis, Ioannis G Fatouros
We examined the temporal changes of isokinetic strength performance of knee flexor (KF) and extensor (KE) strength after a football match. Players were randomly assigned to a control (N = 14, participated only in measurements and practices) or an experimental group (N = 20, participated also in a football match). Participants trained daily during the two days after the match. Match and training overload was monitored with GPS devices. Venous blood was sampled and muscle damage was assessed pre-match, post-match and at 12 h, 36 h and 60 h post-match...
2015: PloS One
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