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https://www.readbyqxmd.com/read/28921035/-midportion-achilles-tendinopathy
#1
REVIEW
J Weber, T Buchhorn
Although the incidence of midportion Achilles tendinopathy is under 1% in the general population, it is quite a common disease in runners that is characterized by the symptom triad of pain, swelling and impaired physical performance. Pain and swelling are located in the area 2 to 7 cm proximal the tendon insertion onto the calcaneus.Diagnosis is made by adequate clinical symptoms and corresponding findings in sonography and/or magnetic resonance imaging scans. Histopathologically, mostly degenerative changes in the tendon structure are found, sometimes accompanied by intra- and paratendinous inflammation...
September 18, 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/28920556/the-effects-of-limb-dominance-and-a-short-term-high-intensity-exercise-protocol-on-both-landings-of-the-vertical-drop-jump-implications-for-the-vertical-drop-jump-as-a-screening-tool
#2
Enda F Whyte, Patrick Kennelly, Oliver Milton, Chris Richter, Siobhán O'Connor, Kieran A Moran
The effectiveness of vertical drop jumps (VDJs) to screen for non-contact ACL injuries is unclear. This may be contributed to by discrete point analysis, which does not evaluate patterns of movement. Also, limited research exists on the second landing of VDJs, potential lower limb performance asymmetries and the effect of fatigue. Statistical parametric mapping investigated the main effects of landing, limb dominance and a high intensity, intermittent exercise protocol (HIIP) on VDJ biomechanics. Twenty-two male athletes (21...
September 18, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28912726/cardiovascular-and-muscular-consequences-of-work-matched-interval-type-of-concentric-and-eccentric-pedaling-exercise-on-a-soft-robot
#3
Martin Flück, Rebekka Bosshard, Max Lungarella
Eccentric types of endurance exercise are an acknowledged alternative to conventional concentric types of exercise rehabilitation for the cardiac patient, because they reduce cardiorespiratory strain due to a lower metabolic cost of producing an equivalent mechanical output. The former contention has not been tested in a power- and work-matched situation of interval-type exercise under identical conditions because concentric and eccentric types of exercise pose specific demands on the exercise machinery, which are not fulfilled in current practice...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28912655/chronic-eccentric-exercise-and-antioxidant-supplementation-effects-on-lipid-profile-and-insulin-sensitivity
#4
Christina Yfanti, Athanasios Tsiokanos, Ioannis G Fatouros, Anastasios A Theodorou, Chariklia K Deli, Yiannis Koutedakis, Athanasios Z Jamurtas
Eccentric exercise has been shown to exert beneficial effects in both lipid profile and insulin sensitivity. Antioxidant supplementation during chronic exercise is controversial as it may prevent the physiological training-induced adaptations. The aim of this study was to investigate: 1) the minimum duration of the eccentric exercise training required before changes on metabolic parameters are observed and 2) whether antioxidant supplementation during training would interfere with these adaptations. Sixteen young healthy men were randomized into the Vit group (1 g of vitamin C and 400 IU vitamin E daily) and the placebo (PL) group...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28912650/the-effects-combining-cryocompression-therapy-following-an-acute-bout-of-resistance-exercise-on-performance-and-recovery
#5
William H DuPont, Brek J Meuris, Vincent H Hardesty, Emily C Barnhart, Landon H Tompkins, Morricia J P Golden, Clayton J Usher, Paul A Spence, Lydia K Caldwell, Emily M Post, Matthew K Beeler, William J Kraemer
Compression and cold therapy used separately have shown to reduce negative effects of tissue damage. The combining compression and cold therapy (cryocompression) as a single recovery modality has yet to be fully examined. To examine the effects of cryocompression on recovery following a bout of heavy resistance exercise, recreationally resistance trained men (n =16) were recruited, matched, and randomly assigned to either a cryocompression group (CRC) or control group (CON). Testing was performed before and then immediately after exercise, 60 minutes, 24 hours, and 48 hours after a heavy resistance exercise workout (barbell back squats for 4 sets of 6 reps at 80% 1RM, 90 sec rest between sets, stiff legged deadlifts for 4 sets of 8 reps at 1...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28912360/influence-of-past-injurious-exercise-on-fiber-type-specific-acute-anabolic-response-to-resistance-exercise-in-skeletal-muscle
#6
Ryo Takagi, Riki Ogasawara, Junya Takegaki, Arata Tsutaki, Koichi Nakazato, Naokata Ishii
We investigated influence of past injurious exercise on anabolic response of skeletal muscle fibers to resistance exercise (RE). Wistar rats were divided into exercise (E) and exercise after injury (I-E) groups. At age 10 wk, the right gastrocnemius muscle in each rat in the I-E group was subjected to strenuous eccentric contractions. Subsequently, RE was imposed on the same muscle of each rat at 14 wk of age in both groups. Peak joint torque and total force generation per body mass during RE were similar between the groups...
September 14, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28900719/the-effects-of-exercise-induced-muscle-damage-on-critical-torque
#7
Marcin K Szczyglowski, Carl J Ade, Jason A Campbell, Christopher D Black
OBJECTIVE: Exercise-induced muscle damage (EIMD) has been shown to reduce endurance exercise performance. This study examined the effects of EIMD on critical torque (CT) and the sum of the torque integral above CT during (∫ T total) during a 5-min all-out, intermittent isometric knee extension exercise. METHODS: CT was determined in eight participants prior to and 48-h following EIMD. EIMD was induced using electrically stimulated eccentric knee extensions until maximal voluntary strength (MVC) was reduced by 40%...
September 12, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28889225/effects-of-blood-flow-restriction-during-moderate-intensity-eccentric-knee-extensions
#8
Michael Behringer, Lars Heinke, Jannik Leyendecker, Joachim Mester
We investigated if blood flow restriction (BFR, cuff pressure 20 mmHG below individual occlusion pressure) increases metabolic stress, hormonal response, release of muscle damage markers, and muscle swelling induced by moderate-intensity eccentric contractions. In a randomized, matched-pair design, 20 male subjects (25.3 ± 3.3 years) performed four sets of unilateral eccentric knee extensions (75% 1RM) to volitional failure with (IG) or without (CG) femoral BFR. Despite significant differences of performed repetitions between IG (85...
September 9, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/28887154/comparing-the-effects-of-two-distinct-eccentric-modalities-to-traditional-resistance-training-in-resistance-trained-higher-functioning-older-adults
#9
Ashley Gluchowski, Deborah Dulson, Fabrice Merien, Lindsay Plank, Nigel Harris
BACKGROUND: The effects of eccentric resistance exercise are of interest in the older adult cohort, but to our knowledge, there is no research on the relative effects of different eccentric modalities on a range of outcomes in higher functioning, resistance trained older adults. METHODS: 33 resistance-trained older adults (aged 67±4.5years) were randomized into one of three supervised training groups: traditional (TRE), eccentric only (ERE) or eccentrically biased resistance exercise (EBRE) on a 45°, plate-loaded leg press machine...
September 5, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28886473/strategies-for-injury-prevention-in-brazilian-football-perceptions-of-physiotherapists-and-practices-of-premier-league-teams
#10
Maurício Couto Meurer, Marcelo Faria Silva, Bruno Manfredini Baroni
OBJECTIVES: To describe the physiotherapists perceptions and the current practices for injury prevention in elite football (soccer) clubs in Brazil. DESIGN: Cross-sectional study. SETTING: Group of Science in Sports & Exercise, Federal University of Healthy Sciences of Porto Alegre (Brazil). PARTICIPANTS: 16 of the 20 football clubs involved in the Brazilian premier league 2015. MAIN OUTCOME MEASURES: Physiotherapists answered a structured questionnaire...
July 25, 2017: Physical Therapy in Sport
https://www.readbyqxmd.com/read/28885389/load-velocity-relationship-in-variations-of-the-half-squat-exercise-influence-of-execution-technique
#11
Alejandro Pérez-Castilla, Amador García-Ramos, Paulino Padial, Antonio J Morales-Artacho, Belén Feriche
Previous studies have revealed that the velocity of the bar can be used to determine the intensity of different resistance training exercises. However, the load-velocity relationship seems to be exercise dependent. This study aimed to compare the load-velocity relationship obtained from two variations of the half-squat exercise (traditional vs. ballistic) using two execution techniques (eccentric-concentric vs. concentric-only). Twenty men performed a submaximal progressive loading test in four half-squat exercises: eccentric-concentric traditional-squat, concentric-only traditional-squat, countermovement jump (i...
September 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28874604/mitochondrial-redox-signaling-enables-repair-of-injured-skeletal-muscle-cells
#12
Adam Horn, Jack H Van der Meulen, Aurelia Defour, Marshall Hogarth, Sen Chandra Sreetama, Aaron Reed, Luana Scheffer, Navdeep S Chandel, Jyoti K Jaiswal
Strain and physical trauma to mechanically active cells, such as skeletal muscle myofibers, injures their plasma membranes, and mitochondrial function is required for their repair. We found that mitochondrial function was also needed for plasma membrane repair in myoblasts as well as nonmuscle cells, which depended on mitochondrial uptake of calcium through the mitochondrial calcium uniporter (MCU). Calcium uptake transiently increased the mitochondrial production of reactive oxygen species (ROS), which locally activated the guanosine triphosphatase (GTPase) RhoA, triggering F-actin accumulation at the site of injury and facilitating membrane repair...
September 5, 2017: Science Signaling
https://www.readbyqxmd.com/read/28872384/feasibility-of-the-two-point-method-for-determining-the-one-repetition-maximum-in-the-bench-press-exercise
#13
Amador García-Ramos, Guy Gregory Haff, Francisco Luis Pestaña-Melero, Alejandro Pérez-Castilla, Francisco Javier Rojas, Carlos Balsalobre-Fernández, Slobodan Jaric
PURPOSE: This study compared the concurrent validity and reliability of previously proposed generalized group equations for estimating the bench press (BP) one-repetition maximum (1RM) with the individualized load-velocity relationship modelled with a two-point method. METHODS: Thirty men (BP 1RM relative to body mass: 1.08 0.18 kg·kg(-1)) performed two incremental loading tests in the concentric-only BP exercise and another two in the eccentric-concentric BP exercise to assess their actual 1RM and load-velocity relationships...
September 5, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28872379/influence-of-different-inertial-loads-on-basic-training-variables-during-the-flywheel-squat-exercise
#14
Rafael Sabido, Jose Luis Hernández-Davó, Gabriel T Pereyra-Gerber
PURPOSE: This study aimed to analyse the effects of different inertial loads on power production and power maintenance), as well as the number of sessions required for proper familiarization during the flywheel quarter-squat. METHODS: Twenty-four high-level handball players attended four testing sessions consisting of 4 sets of 10 repetitions using 4 different inertial loads (0.025, 0.050, 0.075 and 0.100 kg·m(2)). In addition, a fifth set of 15 repetitions was performed...
September 5, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28871832/adding-fish-oil-to-whey-protein-leucine-and-carbohydrate-over-a-6-week-supplementation-period-attenuates-muscle-soreness-following-eccentric-exercise-in-competitive-soccer-players
#15
Jordan D Philpott, Chris Donnelly, Ian H Walshe, James Dick, Stuart D R Galloway, Kevin D Tipton, Oliver C Witard
Soccer players often experience eccentric exercise-induced muscle damage given the physical demands of soccer match-play. Since long chain n-3 polyunsaturated fatty acids (n-3PUFA) enhance muscle sensitivity to protein supplementation, dietary supplementation with a combination of fish oil-derived n-3PUFA, protein and carbohydrate may promote exercise recovery. This study examined the influence of adding n-3PUFA to a whey protein, leucine and carbohydrate containing beverage over a 6 week supplementation period on physiological markers of recovery measured over 3 days following eccentric exercise...
September 5, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/28856749/supplementation-with-a-polyphenol-rich-extract-tensless-%C3%A2-attenuates-delayed-onset-muscle-soreness-and-improves-muscle-recovery-from-damages-after-eccentric-exercise
#16
Cindy Romain, Tomás T Freitas, Francisco J Martínez-Noguera, Caroline Laurent, Sylvie Gaillet, Linda H Chung, Pedro E Alcaraz, Julien Cases
High-intensity exercises are known to provoke delayed onset muscle soreness (DOMS). Delayed onset muscle soreness typically occurs within the first 24 h, peaks between 24 and 72 h, and can last as long as 5-7 days post-exercise. Delayed onset muscle soreness is a multifactorial process involving both mechanical and biochemical components, associated with clinical features that may limit range of motion, and athletes seek for effective recovery strategies to optimize future training sessions. TensLess(®) is a food supplement developed to help manage post-exercise recovery...
August 30, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/28856388/no-beneficial-effect-of-polidocanol-treatment-in-achilles-tendinopathy-a-randomised-controlled-trial
#17
B H Ebbesen, C M Mølgaard, J L Olesen, H E Gregersen, O Simonsen
PURPOSE: Polidocanol injections have been used to treat chronic Achilles tendinopathy in clinical settings, but the few studies published show inconsistent results. The aim of this study was to evaluate the mid-term effect of Polidocanol in patients with chronic Achilles tendinopathy. It was hypothesised that patients treated with Polidocanol would have significant improvements in the outcome measures investigated compared to patients treated with a placebo treatment at mid-term follow-up...
August 30, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28855793/the-use-of-compression-tack-and-flossing-along-with-lacrosse-ball-massage-to-treat-chronic-achilles-tendinopathy-in-an-adolescent-athlete-a-case-report
#18
Jennifer Borda, Mitchell Selhorst
BACKGROUND: Achilles tendinopathy is an overuse injury that often affects individuals engaged in recreational or competitive level activity. Although most patients experience satisfactory results with therapy, a substantial portion fail to respond to traditional treatment. The purpose of this case study is to describe the successful use of compression tack and flossing (CTF) with lacrosse ball massage (LBM) in the treatment of an adolescent athlete with Achilles tendinopathy who had failed to respond to traditional treatment...
February 2017: Journal of Manual & Manipulative Therapy
https://www.readbyqxmd.com/read/28840301/does-kinesiotaping-improve-pain-and-functionality-in-patients-with-newly-diagnosed-lateral-epicondylitis
#19
Leyla Eraslan, Deniz Yuce, Arzu Erbilici, Gul Baltaci
PURPOSE: This study aimed to compare the short-term effects of kinesiotaping and extracorporeal shock wave therapy (ESWT) along with physiotherapy on pain, functionality, and grip strength in patients with newly diagnosed lateral epicondylitis undergoing rehabilitation. METHODS: Forty-five voluntary patients (mean age 48 years) were randomly assigned to three groups. Patients in all groups received physiotherapy consisting of a cold pack and transcutaneous electrical nerve stimulation five times per week for a total of 15 sessions and a home exercise programme including stretching and eccentric strength exercises...
August 24, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28832392/ischemic-preconditioning-blunts-muscle-damage-responses-induced-by-eccentric-exercise
#20
Alexander Franz, Michael Behringer, Jan-Frieder Harmsen, Constantin Mayer, Rüdiger Krauspe, Christoph Zilkens, Moritz Schumann
PURPOSE: Ischemic preconditioning (IPC) is known to reduce muscle damage induced by ischemia and reperfusion-injury (I/R-Injury) during surgery. Due to similarities between the pathophysiological formation of I/R-injury and eccentric exercise-induced muscle damage (EIMD), as characterized by an intracellular accumulation of Ca, an increased production of reactive oxygen species and increased pro-inflammatory signaling, the purpose of the present study was to investigate whether IPC performed prior to eccentric exercise may also protect against EIMD...
August 22, 2017: Medicine and Science in Sports and Exercise
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