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https://www.readbyqxmd.com/read/29657436/upper-extremity-weightlifting-injuries-diagnosis-and-management
#1
REVIEW
Kayvon Golshani, Mark E Cinque, Peter O'Halloran, Kenneth Softness, Laura Keeling, J Ryan Macdonell
Common upper extremity injuries in resistance training athletes include muscle strains, ligament sprains, pectoralis major tendon ruptures, distal biceps tendon ruptures, and chronic shoulder pain and capsulolabral injuries. While each injury is unique in its specific anatomic location and mechanism, each is preventable with proper exercise technique, safety and maintenance of muscle balance. Conservative treatment is the therapeutic modality of choice and these injuries generally resolve with workout modification, appropriate recovery, anti-inflammatory medication, and physical therapy...
March 2018: Journal of Orthopaedics
https://www.readbyqxmd.com/read/29502523/self-reported-dietary-supplement-use-in-deployed-united-states-service-members-pre-deployment-vs-during-deployment-afghanistan-2013-2014
#2
Shawn M Varney, Patrick C Ng, Crystal A Perez, Allyson A Araña, Edwin R Austin, Rosemarie G Ramos, Vikhyat S Bebarta
BACKGROUND: Dietary supplement use (protein/amino acids, weight-loss supplements, performance enhancers) is common among U.S. military members. Reported dietary supplement use in deployed troops is limited and is of concern in settings where troops are exposed to high ambient temperatures, increased physical demands, and dehydration. Our objective was to describe dietary supplement use and adverse events (AEs) among deployed U.S. service members compared with their pre-deployment use...
October 26, 2017: Military Medical Research
https://www.readbyqxmd.com/read/29485323/the-effect-of-one-week-of-a-multi-ingredient-dietary-pre-workout-supplement-on-resting-and-post-acute-resistance-exercise-vascular-function
#3
Austin T Robinson, Adriana Mazzuco, Ahmad S Sabbahi, Audrey Borghi-Silva, Shane A Phillips
Dietary pre-workout supplements are popular among recreational exercisers and athletes. However, the effects of these supplements on the vasculature, both at rest and during exercise, are not well studied. Therefore, the purpose of this study was to determine the effect of one week of supplementation with a multi-ingredient dietary pre-workout supplement on measures of vascular function at rest and immediately following acute resistance exercise in young, recreationally active adults. Twelve participants (9 males, 3 females; age: 24...
February 27, 2018: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29461475/octodrine-new-questions-and-challenges-in-sport-supplements
#4
Valeria Catalani, Mariya Prilutskaya, Ahmed Al-Imam, Shanna Marrinan, Yasmine Elgharably, Mire Zloh, Giovanni Martinotti, Robert Chilcott, Ornella Corazza
Background : Octodrine is the trade name for Dimethylhexylamine (DMHA), a central nervous stimulant that increases the uptake of dopamine and noradrenaline. Originally developed as a nasal decongestant in the 1950's, it has recently been re-introduced on the market as a pre-workout and 'fat-burner' product but its use remains unregulated. Our work provides the first observational cross-sectional analytic study on Octodrine as a new drug trend and its associated harms after a gap spanning seven decades. Methods : A comprehensive multilingual assessment of literature, websites, drug fora and other online resources was carried out with no time restriction in English, German, Russian and Arabic...
February 20, 2018: Brain Sciences
https://www.readbyqxmd.com/read/29414293/physical-activity-and-disability-outcomes-in-multiple-sclerosis-a-systematic-review-2011-2016
#5
REVIEW
Shannon Charron, Kyla A McKay, Helen Tremlett
BACKGROUND: Physical activity may be neuroprotective in multiple sclerosis (MS). One review (2011) of exercise and MS disability was inconclusive, but highlighted the need for more studies. OBJECTIVE: To perform an updated systematic literature review examining the relationship between physical activity and physical ability outcomes in persons with MS. METHODS: EMBASE and MEDLINE were searched for original interventional studies (2011-2016) evaluating exercise on quantitative outcomes of physical disability in MS...
February 2018: Multiple Sclerosis and related Disorders
https://www.readbyqxmd.com/read/29401192/examination-of-a-multi-ingredient-pre-workout-supplement-on-total-volume-of-resistance-exercise-and-subsequent-strength-and-power-performance
#6
Haley C Bergstrom, M Travis Byrd, Brian J Wallace, Jody L Clasey
This study examined the acute effects of a multi-ingredient pre-workout supplement on: 1) total, lower, and upper body volume of resistance exercise; and 2) the subsequent lower body strength (isokinetic leg extension and flexion), lower (vertical jump [VJ] height), upper body power (bench-throw velocity [BTv]), and cycle ergometry performance (critical power [CP] and anaerobic work capacity [AWC]). Twelve men completed baseline strength and power measures prior to two experimental visits, supplement (SUP) and placebo (PL)...
February 1, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29311763/the-acute-effects-of-a-multi-ingredient-pre-workout-supplement-on-resting-energy-expenditure-and-exercise-performance-in-recreationally-active-females
#7
Michael Cameron, Clayton L Camic, Scott Doberstein, Jacob L Erickson, Andrew R Jagim
Background: The use of dietary supplements to improve performance is becoming increasingly popular among athletes and fitness enthusiasts. Unfortunately, there is a tremendous lack of research being done regarding female athletes and the use of sport supplements. The purpose of this study was to examine the acute effects of multi-ingredient pre-workout supplement (MIPS) ingestion on resting metabolism and exercise performance in recreationally-active females. Methods: Fifteen recreationally-active females participated in a randomized, double-blind, placebo controlled study...
2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29209154/effects-of-two-pre-workout-supplements-on-concentric-and-eccentric-force-production-during-lower-body-resistance-exercise-in-males-and-females-a-counterbalanced-double-blind-placebo-controlled-trial
#8
RANDOMIZED CONTROLLED TRIAL
Grant M Tinsley, Matthew A Hamm, Amy K Hurtado, Austin G Cross, Jose G Pineda, Austin Y Martin, Victor A Uribe, Ty B Palmer
Background: Pre-workout supplements purportedly enhance feelings of energy, reduce fatigue and improve exercise performance. The purpose of this study was to examine the performance effects of caffeinated and non-caffeinated multi-ingredient pre-workout supplements. Methods: In a counterbalanced, double-blind, placebo-controlled design, eccentric and concentric force production during lower body resistance exercise on a mechanized squat device were assessed after supplement ingestion...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29057836/citrulline-malate-does-not-improve-muscle-recovery-after-resistance-exercise-in-untrained-young-adult-men
#9
Douglas K da Silva, Jeferson L Jacinto, Walquiria B de Andrade, Mirela C Roveratti, José M Estoche, Mario C W Balvedi, Douglas B de Oliveira, Rubens A da Silva, Andreo F Aguiar
The effects of citrulline malate (CM) on muscle recovery from resistance exercise remains unknown. We aimed to determine if citrulline malate supplementation improves muscle recovery after a single session of high-intensity resistance exercise (RE) in untrained young adult men. Nine young adult men (24.0 ± 3.3 years) participated in a double-blind crossover study in which they received 6 g of CM and placebo (PL) on two occasions, separated by a seven-day washout period. Each occasion consisted of a single session of high-intensity RE (0 h) and three subsequent fatigue tests sessions (at 24, 48, and 72 h) to assess the time course of muscle recovery...
October 18, 2017: Nutrients
https://www.readbyqxmd.com/read/28959158/effects-of-a-pre-workout-supplement-on-hyperemia-following-leg-extension-resistance-exercise-to-failure-with-different-resistance-loads
#10
RANDOMIZED CONTROLLED TRIAL
Jeffrey S Martin, Petey W Mumford, Cody T Haun, Micheal J Luera, Tyler W D Muddle, Ryan J Colquhoun, Mary P Feeney, Cameron S Mackey, Paul A Roberson, Kaelin C Young, David D Pascoe, Jason M DeFreitas, Nathaniel D M Jenkins, Michael D Roberts
BACKGROUND: We sought to determine if a pre-workout supplement (PWS), containing multiple ingredients thought to enhance blood flow, increases hyperemia associated with resistance training compared to placebo (PBO). Given the potential interaction with training loads/time-under-tension, we evaluated the hyperemic response at two different loads to failure. METHODS: Thirty males participated in this double-blinded study. At visit 1, participants were randomly assigned to consume PWS (Reckless™) or PBO (maltodextrin and glycine) and performed four sets of leg extensions to failure at 30% or 80% of their 1-RM 45-min thereafter...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28910233/effects-of-supplementation-with-beef-or-whey-protein-versus-carbohydrate-in-master-triathletes
#11
Fernando Naclerio, Marco Seijo, Eneko Larumbe-Zabala, Nadia Ashrafi, Tatiana Christides, Bettina Karsten, Birthe V Nielsen
OBJECTIVE: The present study compares the effect of ingesting hydrolyzed beef protein, whey protein, and carbohydrate on performance, body composition (via plethysmography), muscular thickness, and blood indices of health, including ferritin concentrations, following a 10-week intervention program. METHODS: After being randomly assigned to one of the following groups-beef, whey, or carbohydrate-24 master-age (35-60 years old) male triathletes (n = 8 per treatment) ingested 20 g of supplement mixed with plain water once a day (immediately after training or before breakfast)...
November 2017: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/28902119/determination-of-vertical-jump-as-a-measure-of-neuromuscular-readiness-and-fatigue
#12
Casey M Watkins, Saldiam R Barillas, Megan A Wong, David C Archer, Ian J Dobbs, Robert G Lockie, Jared W Coburn, Tai T Tran, Lee E Brown
Watkins, CM, Barillas, SR, Wong, MA, Archer, DC, Dobbs, IJ, Lockie, RG, Coburn, JW, Tran, TT, and Brown, LE. Determination of vertical jump as a measure of neuromuscular readiness and fatigue. J Strength Cond Res 31(12): 3305-3310, 2017-Coaches closely monitor training loads and periodize sessions throughout the season to create optimal adaptations at the proper time. However, only monitoring training loads ignores the innate physiological stress each athlete feels individually. Vertical jump (VJ) is widely used as a measure of lower-body power, and has been used in postmatch studies to demonstrate fatigue levels...
December 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28885973/hemorrhagic-stroke-in-a-young-healthy-male-following-use-of-pre-workout-supplement-animal-rage-xl
#13
Brandon F Harris, Coty Winn, Thomas B Ableman
So-called "pre-workout" supplements are substances marketed as natural dietary supplements with claims of helping athletes achieve more focused and intense workouts. The use of such products remains popular among American youth as a whole, but is especially high among active duty service members. Supplements are minimally regulated by the Food and Drug Administration (FDA), and unlike pharmaceuticals, supplements are often brought to market without any testing to show neither efficacy nor safety. Several case reports have documented serious adverse events and raise the question of whether supplement use was a causative factor...
September 2017: Military Medicine
https://www.readbyqxmd.com/read/28811750/availability-of-a-sports-dietitian-may-lead-to-improved-performance-and-recovery-of-ncaa-division-i-baseball-athletes
#14
Michael V Hull, Jonathan Neddo, Andrew R Jagim, Jonathan M Oliver, Mike Greenwood, Margaret T Jones
BACKGROUND: The purpose was to survey dietary habits (DH) and nutrient timing (NT) practices of baseball student-athletes (mean ±  SD; 20.7 ± 1.4 yr.) from three NCAA Division I institutions, and examine the effect of a sports dietitian (SD) in regard to nutrition practices. METHODS: Descriptive statistics and Pearson X 2 analyses were run. Responses on 10 DH and 5 NT items differed ( p  ≤ 0.10) between athletes who sought dietary planning from a SD ( n  = 36) versus those who consulted a strength and conditioning coach (SCC, n  = 42)...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28763003/short-term-effects-of-a-ready-to-drink-pre-workout-beverage-on-exercise-performance-and-recovery
#15
Patrick B Collins, Conrad P Earnest, Ryan L Dalton, Ryan J Sowinski, Tyler J Grubic, Christopher J Favot, Adriana M Coletta, Christopher Rasmussen, Mike Greenwood, Richard B Kreider
In a double-blind, randomized and crossover manner, 25 resistance-trained participants ingested a placebo (PLA) beverage containing 12 g of dextrose and a beverage (RTD) containing caffeine (200 mg), β-alanine (2.1 g), arginine nitrate (1.3 g), niacin (65 mg), folic acid (325 mcg), and Vitamin B12 (45 mcg) for 7-days, separated by a 7-10-day. On day 1 and 6, participants donated a fasting blood sample and completed a side-effects questionnaire (SEQ), hemodynamic challenge test, 1-RM and muscular endurance tests (3 × 10 repetitions at 70% of 1-RM with the last set to failure on the bench press (BP) and leg press (LP)) followed by ingesting the assigned beverage...
August 1, 2017: Nutrients
https://www.readbyqxmd.com/read/28753624/muscular-fatigue-in-response-to-different-modalities-of-crossfit-sessions
#16
José Luis Maté-Muñoz, Juan H Lougedo, Manuel Barba, Pablo García-Fernández, Manuel V Garnacho-Castaño, Raúl Domínguez
BACKGROUND: CrossFit is a new strength and conditioning regimen involving short intense daily workouts called workouts of the day (WOD). This study assesses muscular fatigue levels induced by the three modalities of CrossFit WOD; gymnastics (G), metabolic conditioning (M) and weightlifting (W). MATERIAL AND METHODS: 34 healthy subjects undertook three WOD (one per week): a G WOD consisting of completing the highest number of sets of 5 pull-ups, 10 push-ups and 15 air squats in 20 min; an M WOD, in which the maximum number of double skipping rope jumps was executed in 8 sets (20 s), resting (10 s) between sets; and finally, a W WOD in which the maximum number of power cleans was executed in 5 min, lifting a load equivalent to 40% of the individual's 1RM...
2017: PloS One
https://www.readbyqxmd.com/read/28662108/short-term-adaptations-following-complex-training-in-team-sports-a-meta-analysis
#17
Tomás T Freitas, Alejandro Martinez-Rodriguez, Julio Calleja-González, Pedro E Alcaraz
OBJECTIVE: The purpose of this meta-analysis was to study the short-term adaptations on sprint and vertical jump (VJ) performance following Complex Training (CT) in team-sports. CT is a resistance training method aimed at developing both strength and power, which has a direct effect on sprint and VJ. It consists on alternating heavy resistance training exercises with plyometric/power ones, set for set, on the same workout. METHODS: A search of electronic databases up to July 2016 (PubMed-MEDLINE, SPORTDiscus, Web of Knowledge) was conducted...
2017: PloS One
https://www.readbyqxmd.com/read/28642676/international-society-of-sports-nutrition-position-stand-protein-and-exercise
#18
REVIEW
Ralf Jäger, Chad M Kerksick, Bill I Campbell, Paul J Cribb, Shawn D Wells, Tim M Skwiat, Martin Purpura, Tim N Ziegenfuss, Arny A Ferrando, Shawn M Arent, Abbie E Smith-Ryan, Jeffrey R Stout, Paul J Arciero, Michael J Ormsbee, Lem W Taylor, Colin D Wilborn, Doug S Kalman, Richard B Kreider, Darryn S Willoughby, Jay R Hoffman, Jamie L Krzykowski, Jose Antonio
The International Society of Sports Nutrition (ISSN) provides an objective and critical review related to the intake of protein for healthy, exercising individuals. Based on the current available literature, the position of the Society is as follows:An acute exercise stimulus, particularly resistance exercise, and protein ingestion both stimulate muscle protein synthesis (MPS) and are synergistic when protein consumption occurs before or after resistance exercise.For building muscle mass and for maintaining muscle mass through a positive muscle protein balance, an overall daily protein intake in the range of 1...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28630580/the-effect-of-upper-body-anaerobic-pre-loading-on-2000-m-ergometer-rowing-performance-in-college-level-male-rowers
#19
Priit Purge, Peter Hofmann, Rait Merisaar, Alexander Mueller, Gerhard Tschakert, Jarek Mäestu, Jaak Jürimäe
Elevated blood lactate has been shown to influence subsequent anaerobic exercise due to an inhibition of glycolysis. The aim of the present study was therefore to investigate the influence of a short and high-intensity anaerobic arm crank pre-load exercise (HIE) added to a low-intensity warm-up on cardio-respiratory and metabolic responses on a subsequent all out rowing exercise. Nine well-trained college level male rowers (24.6 ± 7.1 yrs; 1.87 ± 0.07 m; 88.9 ± 9.8 kg; 18.5 ± 3.7% body fat) volunteered to participate in the study...
June 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28613947/the-effects-of-basal-insulin-suspension-at-the-start-of-exercise-on-blood-glucose-levels-during-continuous-versus-circuit-based-exercise-in-individuals-with-type-1-diabetes-on-continuous-subcutaneous-insulin-infusion
#20
Dessi Zaharieva, Loren Yavelberg, Veronica Jamnik, Ali Cinar, Kamuran Turksoy, Michael C Riddell
BACKGROUND: Exercise causes glycemic disturbances in individuals with type 1 diabetes (T1D). Continuous moderate-intensity aerobic exercise (CON) generally lowers blood glucose (BG) levels and often leads to hypoglycemia. In comparison, circuit-based exercise (CIRC) may attenuate the drop in BG. The goal of this study is to contrast the effects of basal insulin suspension at the onset of two different forms of exercise (CON vs. CIRC). METHODS: Twelve individuals (six men and six women) with T1D on insulin pump therapy were recruited for the study...
June 2017: Diabetes Technology & Therapeutics
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