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https://www.readbyqxmd.com/read/28702808/longer-exercise-duration-delays-post-exercise-recovery-of-cardiac-parasympathetic-but-not-sympathetic-indices
#1
Scott Michael, Ollie Jay, Kenneth S Graham, Glen M Davis
PURPOSE: This study investigated non-invasive indices of post-exercise parasympathetic reactivation (using heart rate variability, HRV) and sympathetic withdrawal (using systolic time intervals, STI) following different exercise durations. METHODS: 13 healthy males (age 26.4 ± 4.7 years) cycled at 70% heart rate (HR) reserve for two durations-8 min (SHORT) and 32 min (LONG)-on separate occasions: HRV (including natural logarithm of root mean square of successive differences, Ln-RMSSD) and STI (including pre-ejection period, PEP) were assessed throughout 10 min seated recovery...
July 12, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28654037/non-invasive-assessments-of-subjective-and-objective-recovery-characteristics-following-an-exhaustive-jump-protocol
#2
Erich Hohenauer, Peter Clarys, Jean-Pierre Baeyens, Ron Clijsen
Fast recovery after strenuous exercise is important in sports and is often studied via cryotherapy applications. Cryotherapy has a significant vasoconstrictive effect, which seems to be the leading factor in its effectiveness. The resulting enhanced recovery can be measured by using both objective and subjective parameters. Two commonly measured subjective characteristics of recovery are delayed-onset muscle soreness (DOMS) and ratings of perceived exertion (RPE). Two important objective recovery characteristics are countermovement jump (CMJ) performance and peak power output (PPO)...
June 8, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28638350/branched-chain-amino-acid-ingestion-stimulates-muscle-myofibrillar-protein-synthesis-following-resistance-exercise-in-humans
#3
Sarah R Jackman, Oliver C Witard, Andrew Philp, Gareth A Wallis, Keith Baar, Kevin D Tipton
The ingestion of intact protein or essential amino acids (EAA) stimulates mechanistic target of rapamycin complex-1 (mTORC1) signaling and muscle protein synthesis (MPS) following resistance exercise. The purpose of this study was to investigate the response of myofibrillar-MPS to ingestion of branched-chain amino acids (BCAAs) only (i.e., without concurrent ingestion of other EAA, intact protein, or other macronutrients) following resistance exercise in humans. Ten young (20.1 ± 1.3 years), resistance-trained men completed two trials, ingesting either 5...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28615996/international-society-of-sports-nutrition-position-stand-safety-and-efficacy-of-creatine-supplementation-in-exercise-sport-and-medicine
#4
REVIEW
Richard B Kreider, Douglas S Kalman, Jose Antonio, Tim N Ziegenfuss, Robert Wildman, Rick Collins, Darren G Candow, Susan M Kleiner, Anthony L Almada, Hector L Lopez
Creatine is one of the most popular nutritional ergogenic aids for athletes. Studies have consistently shown that creatine supplementation increases intramuscular creatine concentrations which may help explain the observed improvements in high intensity exercise performance leading to greater training adaptations. In addition to athletic and exercise improvement, research has shown that creatine supplementation may enhance post-exercise recovery, injury prevention, thermoregulation, rehabilitation, and concussion and/or spinal cord neuroprotection...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28611675/cardiac-autonomic-responses-during-exercise-and-post-exercise-recovery-using-heart-rate-variability-and-systolic-time-intervals-a-review
#5
REVIEW
Scott Michael, Kenneth S Graham, Glen M Davis
Cardiac parasympathetic activity may be non-invasively investigated using heart rate variability (HRV), although HRV is not widely accepted to reflect sympathetic activity. Instead, cardiac sympathetic activity may be investigated using systolic time intervals (STI), such as the pre-ejection period. Although these autonomic indices are typically measured during rest, the "reactivity hypothesis" suggests that investigating responses to a stressor (e.g., exercise) may be a valuable monitoring approach in clinical and high-performance settings...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28596270/timing-of-post-exercise-carbohydrate-protein-supplementation-roles-of-gastrointestinal-blood-flow-and-mucosal-cell-damage-on-gastric-emptying-in-humans
#6
Hideaki Kashima, Nao Harada, Kanae Miyamoto, Masaki Fujimoto, Chiaki Fujita, Masako Yamaoka Endo, Toshio Kobayashi, Akira Miura, Yoshiyuki Fukuba
It is well known that protein ingestion immediately after exercise greatly stimulates muscle protein synthesis during the post-exercise recovery phase. However, immediately after strenuous exercise, the gastrointestinal (GI) mucosa is frequently injured by hypoperfusion in the organ/tissue, possibly resulting in impaired GI function (e.g., gastric emptying; GE). The aim of this study was to examine the effect of GI blood flow on the GE rate. Eight healthy young subjects performed an intermittent supramaximal cycling exercise for 30 min, which consisted of a 120% VO2 peak for 20 s, followed by 20 W for 40 s...
June 8, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28588499/intake-of-a-ketone-ester-drink-during-recovery-from-exercise-promotes-mtorc1-signaling-but-not-glycogen-resynthesis-in-human-muscle
#7
Tijs Vandoorne, Stefan De Smet, Monique Ramaekers, Ruud Van Thienen, Katrien De Bock, Kieran Clarke, Peter Hespel
Purpose: Ketone bodies are energy substrates produced by the liver during prolonged fasting or low-carbohydrate diet. The ingestion of a ketone ester (KE) rapidly increases blood ketone levels independent of nutritional status. KE has recently been shown to improve exercise performance, but whether it can also promote post-exercise muscle protein or glycogen synthesis is unknown. Methods: Eight healthy trained males participated in a randomized double-blind placebo-controlled crossover study. In each session, subjects undertook a bout of intense one-leg glycogen-depleting exercise followed by a 5-h recovery period during which they ingested a protein/carbohydrate mixture...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28579190/effect-of-low-level-laser-therapy-lllt-and-light-emitting-diodes-ledt-applied-during-combined-training-on-performance-and-post-exercise-recovery-protocol-for-a-randomized-placebo-controlled-trial
#8
Aryane Flauzino Machado, Jéssica Kirsch Micheletti, Franciele Marques Vanderlei, Fabio Yuzo Nakamura, Ernesto Cesar Pinto Leal-Junior, Jayme Netto Junior, Carlos Marcelo Pastre
BACKGROUND: Previous studies have shown positive results of phototherapy for improving performance and accelerating recovery; however, the effects of phototherapy during training and after a primary adaptation remain unclear. The aim of this randomized controlled trial is to analyze the effects of phototherapy and combined training on clinical, functional, and psychological outcomes and on vascular endothelial growth factor. METHODS: This randomized placebo-controlled trial by stratified sample will involve 45 healthy male participants...
July 2017: Brazilian Journal of Physical Therapy
https://www.readbyqxmd.com/read/28557663/dietary-supplement-intake-and-associated-factors-among-gym-users-in-a-university-community
#9
Amita Attlee, Amina Haider, Asma Hassan, Noura Alzamil, Mona Hashim, Reyad Shaker Obaid
Dietary supplement intake and associated factors among gym users in a university community in Sharjah, United Arab Emirates (UAE), were assessed using a structured, self-administered questionnaire in this cross-sectional study. Adults (N = 320) from five gyms in the University City of Sharjah participated in this cross-sectional study. The prevalence of dietary supplement intake was 43.8%. Statistically significant associations were found between the use of dietary supplements and sex (47.7% males, 28.1% females; p = ...
May 30, 2017: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/28552472/exacerbated-in-vivo-metabolic-changes-suggestive-of-a-spontaneous-muscular-vaso-occlusive-crisis-in-exercising-muscle-of-a-sickle-cell-mouse
#10
Benjamin Chatel, Laurent A Messonnier, David Bendahan
While sickle cell disease (SCD) is characterized by frequent vaso-occlusive crisis (VOC), no direct observation of such an event in skeletal muscle has been performed in vivo. The present study reported exacerbated in vivo metabolic changes suggestive of a spontaneous muscular VOC in exercising muscle of a sickle cell mouse. Using magnetic resonance spectroscopy of phosphorus 31, phosphocreatine and inorganic phosphate concentrations and intramuscular pH were measured throughout two standardized protocols of rest - exercise - recovery at two different intensities in ten SCD mice...
June 2017: Blood Cells, Molecules & Diseases
https://www.readbyqxmd.com/read/28527012/effect-of-voluntary-hypocapnic-hyperventilation-or-moderate-hypoxia-on-metabolic-and-heart-rate-responses-during-high-intensity-intermittent-exercise
#11
Kohei Dobashi, Naoto Fujii, Kazuhito Watanabe, Bun Tsuji, Yosuke Sasaki, Tomomi Fujimoto, Satoru Tanigawa, Takeshi Nishiyasu
PURPOSE: To investigate the effect of voluntary hypocapnic hyperventilation or moderate hypoxia on metabolic and heart rate responses during high-intensity intermittent exercise. METHODS: Ten males performed three 30-s bouts of high-intensity cycling [Ex1 and Ex2: constant-workload at 80% of the power output in the Wingate anaerobic test (WAnT), Ex3: WAnT] interspaced with 4-min recovery periods under normoxic (Control), hypocapnic or hypoxic (2500 m) conditions...
August 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28515836/college-students-knowledge-of-recovery-beverage-serving-sizes
#12
Stephanie Lewis, Victoria Baxter, Kim Spaccarotella, Walter Andzel
Previous research suggests that chocolate milk may be a beneficial recovery beverage, yet little is known about how athletes and students training for careers in sports science or health-related fields interpret recommended recovery beverage serving sizes. This study examined college students' ability to correctly apply serving size recommendations for chocolate milk and protein powder used during post-exercise recovery and assessed usual consumption of milk as a recovery beverage. College students (34 women, 39 men) poured the amount of chocolate milk they would consume within 90 minutes after exercise unaided and with the use of a serving size guide...
2017: International Journal of Exercise Science
https://www.readbyqxmd.com/read/28512432/whole-body-cryotherapy-in-athletes-from-therapy-to-stimulation-an-updated-review-of-the-literature
#13
REVIEW
Giovanni Lombardi, Ewa Ziemann, Giuseppe Banfi
Nowadays, whole-body cryotherapy is a medical physical treatment widely used in sports medicine. Recovery from injuries (e.g., trauma, overuse) and after-season recovery are the main purposes for application. However, the most recent studies confirmed the anti-inflammatory, anti-analgesic, and anti-oxidant effects of this therapy by highlighting the underlying physiological responses. In addition to its therapeutic effects, whole-body cryotherapy has been demonstrated to be a preventive strategy against the deleterious effects of exercise-induced inflammation and soreness...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28464800/effect-of-tendon-vibration-during-wide-pulse-neuromuscular-electrical-stimulation-nmes-on-the-decline-and-recovery-of-muscle-force
#14
Vanesa Bochkezanian, Robert U Newton, Gabriel S Trajano, Amilton Vieira, Timothy S Pulverenti, Anthony J Blazevich
BACKGROUND: Neuromuscular electrical stimulation (NMES) is commonly used to activate skeletal muscles and reverse muscle atrophy in clinical populations. Clinical recommendations for NMES suggest the use of short pulse widths (100-200 μs) and low-to-moderate pulse frequencies (30-50 Hz). However, this type of NMES causes rapid muscle fatigue due to the (non-physiological) high stimulation intensities and non-orderly recruitment of motor units. The use of both wide pulse widths (1000 μs) and tendon vibration might optimize motor unit activation through spinal reflex pathways and thus delay the onset of muscle fatigue, increasing muscle force and mass...
May 2, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28440795/multimodal-chest-surface-motion-data-for-respiratory-and-cardiovascular-monitoring-applications
#15
Ghufran Shafiq, Kalyana Chakravarthy Veluvolu
Chest surface motion is of significant importance as it contains information of respiratory and cardiac systems together with the complex coupling between these two systems. Chest surface motion is not only critical in radiotherapy, but also useful in personalized systems for continuous cardiorespiratory monitoring. In this dataset, a multimodal setup is employed to simultaneously acquire cardiorespiratory signals. These signals include high-density trunk surface motion (from 16 distinct locations) with VICON motion capture system, nasal breathing from a thermal sensor, respiratory effort from a strain belt and electrocardiogram in lead-II configuration...
April 25, 2017: Scientific Data
https://www.readbyqxmd.com/read/28433920/proteomic-analysis-of-sockeye-salmon-serum-as-a-tool-for-biomarker-discovery-and-new-insight-into-the-sublethal-toxicity-of-diluted-bitumen
#16
Sarah L Alderman, Laura A Dindia, Christopher J Kennedy, Anthony P Farrell, Todd E Gillis
Pipelines carrying diluted bitumen (dilbit) from Canada's oil sands traverse North America, including the freshwater habitat of Pacific salmon, posing a risk of environmental release and aquatic exposure. Swimming performance is impacted in juvenile sockeye (Oncorhynchus nerka) exposed to dilbit; therefore biomarkers of dilbit exposure will be valuable for monitoring at-risk salmon stocks. This study characterized changes in the serum proteome of sockeye exposed to a sub-lethal and environmentally relevant concentration of dilbit using isobaric tags for relative and absolute quantitation (iTRAQ), and included a range of experimental conditions to permit identification of biomarkers that are robust across time (1 and 4wk) and exercise level (at rest and following a swim test)...
April 12, 2017: Comparative Biochemistry and Physiology. Part D, Genomics & Proteomics
https://www.readbyqxmd.com/read/28386694/effect-of-alcohol-after-muscle-damaging-resistance-exercise-on-muscular-performance-recovery-and-inflammatory-capacity-in-women
#17
Danielle E Levitt, Hui-Ying Luk, Anthony A Duplanty, Brian K McFarlin, David W Hill, Jakob L Vingren
PURPOSE: To investigate the effect of acute alcohol consumption on muscular performance recovery, assessed by maximal torque production, and on inflammatory capacity, assessed by lipopolysaccharide (LPS)-stimulated cytokine production, following muscle-damaging resistance exercise in women. METHODS: Thirteen recreationally resistance-trained women completed two identical exercise bouts (300 maximal single-leg eccentric leg extensions) followed by alcohol (1.09 g ethanol kg(-1) fat-free body mass) or placebo ingestion...
April 6, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28385599/intramyocellular-lipid-content-and-lipogenic-gene-expression-responses-following-a-single-bout-of-resistance-type-exercise-differ-between-young-and-older-men
#18
Kostas Tsintzas, Francis B Stephens, Tim Snijders, Benjamin T Wall, Scott Cooper, Joanne Mallinson, Lex B Verdijk, Luc J C van Loon
The aim of this study was to examine the temporal relationship between intramyocellular lipid (IMCL) content and the expression of genes associated with IMCL turnover, fat metabolism, and inflammation during recovery from an acute bout of resistance type exercise in old versus young men. Seven healthy young (23±2years, 77.2±2.9kg) and seven healthy older (72±1years, 79.3±4.9kg) males performed a single bout of resistance exercise involving 6 sets of 10 repetitions of leg press and 6 sets of 10 repetitions of leg extension at 75% one-repetition maximum (1-RM)...
July 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28360825/ingestion-of-oxygenated-water-enhances-lactate-clearance-kinetics-in-trained-runners
#19
Neil Fleming, Jeremiah Vaughan, Matthew Feeback
BACKGROUND: Drinks with higher dissolved oxygen concentrations have in recent times gained popularity as a potential ergogenic aid, despite a lack of evidence regarding their efficacy. The aim of this study was to assess effects of ingestion of an oxygen supplement (OS) on exercise performance and post-exercise recovery in a group of trained runners. METHODS: Trained male runners (n = 25, mean ± SD; age 23 ± 6 years, mass 70 ± 9 kg, BMI 21.9 ± 2...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28358570/enhancing-daily-well-being-at-work-through-lunchtime-park-walks-and-relaxation-exercises-recovery-experiences-as-mediators
#20
Marjaana Sianoja, Christine J Syrek, Jessica de Bloom, Kalevi Korpela, Ulla Kinnunen
Only few studies so far have examined recovery from work during workday breaks. In this intervention study, based on the effort-recovery model and the conservation of resources theory, we examined how to enhance recovery during lunch breaks. More specifically, we examined the within-person effects of lunchtime park walks and relaxation exercises on employees' levels of concentration, strain, and fatigue experienced at the end of a working day. We moreover tested whether detachment from work and enjoyment experienced during lunch breaks transmitted the effects of these activities to well-being outcomes...
March 30, 2017: Journal of Occupational Health Psychology
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