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Recovery oxygen consumption in performance

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https://www.readbyqxmd.com/read/29746639/branched-chain-amino-acids-are-the-primary-limiting-amino-acids-in-the-diets-of-endurance-trained-men-after-a-bout-of-prolonged-exercise
#1
Hiroyuki Kato, Katsuya Suzuki, Makoto Bannai, Daniel R Moore
Background: The indicator amino acid oxidation (IAAO) method estimates the protein intake required to maximize whole-body protein synthesis and identify the daily protein requirement in a variety of populations. However, it is unclear whether the greater requirements for endurance athletes previously determined by the IAAO reflect an increased demand for all or only some amino acids. Objective: The aim of this study was to determine the primary rate-limiting amino acids in endurance-trained athletes after prolonged exercise, by measuring the oxidation of ingested [1-13C]phenylalanine in response to variable amino acid intake...
May 9, 2018: Journal of Nutrition
https://www.readbyqxmd.com/read/29650336/acute-physiological-responses-to-low-intensity-blood-flow-restriction-cycling
#2
H J Thomas, B R Scott, J J Peiffer
OBJECTIVES: Blood flow restriction (BFR) during interval cycling may stimulate aerobic and anaerobic adaptations. However, acute physiological responses to BFR interval cycling have not been extensively investigated. DESIGN: Eighteen males completed low-intensity (LI), low-intensity with BFR (LIBFR ) and high-intensity (HI) interval cycling sessions in randomised and counterbalanced order. These included a standardised warm-up and three two-min intervals interspersed with two-min recovery...
April 9, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29619796/overnight-fasting-compromises-exercise-intensity-and-volume-during-sprint-interval-training-but-improves-high-intensity-aerobic-endurance
#3
Tasuku Terada, Saeed R Toghi Eshghi, Yilina Liubaoerjijin, Michael Kennedy, Etienne Myette-Côté, Kevin Fletcher, Normand G Boulé
BACKGROUND: The combined effects of sprint interval training (SIT) and exercising in the fasted state are unknown. We compared the effects of SIT with exogenous carbohydrate supplementation (SITCHO) and SIT following overnight fast (SITFast) on aerobic capacity (peak oxygen consumption: V̇ O2peak) and high-intensity aerobic endurance (time-to-exhaustion at 85% V̇ O2peak [T85%]). METHODS: Twenty male cyclists were randomized to SITCHO and SITFast. Both groups performed 30-second all-out cycling followed by 4-minute active recovery 3 times per week for 4 weeks, with the number of sprint bouts progressing from 4 to 7...
April 4, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29570596/quantifying-the-physical-response-to-a-contemporary-amateur-boxing-simulation
#4
Mitchell J Finlay, Matt Greig, Richard M Page
Finlay, MJ, Greig, M, and Page, RM. Quantifying the physical response to a contemporary amateur boxing simulation. J Strength Cond Res 32(4): 1005-1012, 2018-This study examined the physical response to a contemporary boxing-specific exercise protocol (BSEP), based on notational analysis of amateur boxing. Nine male senior elite amateur boxers completed a 3 × 3-minute BSEP, with a 1-minute passive recovery period interspersing each round. Average (HRave) and peak (HRpeak) heart rates, average (V[Combining Dot Above]O2ave) and peak oxygen consumptions (V[Combining Dot Above]O2peak), blood lactate (BLa) concentrations, rating of perceived exertion, and both triaxial and uniaxial PlayerLoad metrics were recorded during the completion of the BSEP...
April 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29566344/diurnal-variation-in-repeated-sprint-performance-cannot-be-offset-when-rectal-and-muscle-temperatures-are-at-optimal-levels-38-5%C3%A2-c
#5
Samuel A Pullinger, Juha Oksa, Liam F Clark, Joe W F Guyatt, Antonia Newlove, Jatin G Burniston, Dominic A Doran, James M Waterhouse, Ben J Edwards
The present study investigated whether increasing morning rectal temperatures (Trec ) to evening levels, or increasing morning and evening Trec to an "optimal" level (38.5°C), resulting in increased muscle temperatures (Tm ), would offset diurnal variation in repeated sprint (RS) performance in a causal manner. Twelve trained males underwent five sessions [age (mean ± SD) 21.0 ± 2.3 years, maximal oxygen consumption (V̇O2 max) 60.0 ± 4.4 mL.kg-1  min-1 , height 1.79 ± 0.06 m, body mass 78...
March 22, 2018: Chronobiology International
https://www.readbyqxmd.com/read/29541134/effects-of-prolonged-running-in-the-heat-and-cool-environments-on-selected-physiological-parameters-and-salivary-lysozyme-responses
#6
Nur S Ibrahim, Chee K Chen, Ayunizma Ayub, Ayu S Muhamad
Introduction: Lysozyme is one of the salivary antimicrobial proteins which act as the "first line of defence" at the mucosal surface. The effects of prolonged exercise in the hot and cool environments among recreational athletes on salivary lysozyme responses are very limited in the literature, especially in the Asian countries. Objective: To determine the effects of prolonged running in the hot and cool environments on selected physiological parameters and salivary lysozyme responses among recreational athletes...
December 2017: Journal of Exercise Science and Fitness
https://www.readbyqxmd.com/read/29534031/l-carnitine-supplementation-in-recovery-after-exercise
#7
REVIEW
Roger Fielding, Linda Riede, James P Lugo, Aouatef Bellamine
Given its pivotal role in fatty acid oxidation and energy metabolism, l-carnitine has been investigated as ergogenic aid for enhancing exercise capacity in the healthy athletic population. Early research indicates its beneficial effects on acute physical performance, such as increased maximum oxygen consumption and higher power output. Later studies point to the positive impact of dietary supplementation with l-carnitine on the recovery process after exercise. It is demonstrated that l-carnitine alleviates muscle injury and reduces markers of cellular damage and free radical formation accompanied by attenuation of muscle soreness...
March 13, 2018: Nutrients
https://www.readbyqxmd.com/read/29511660/sprint-interval-training-on-the-vertical-treadmill-improves-aerobic-and-anaerobic-running-performance
#8
Alastair Ross Jordan, David Claxton, Alison Purvis, Andrew Barnes, Mary Fysh
The vertical treadmill (VertiRun) is an unresearched mode of exercise where users engage in a "running-like" action whilst body weight is supported by a recumbent bench and overhanging resistance cables are tethered to the user's ankles. The purpose of this study was to determine the effects of training on a VertiRun and any cross-training effect on running performance. Thirty active males (age, 22±4 years; stature, 1.79±0.08 m; body mass, 78.5±12.6 kg) volunteered for this study. Participants' aerobic and anaerobic running performance were determined by incremental maximum rate of oxygen consumption (VO2max) treadmill test and a maximum anaerobic running test (MART), respectively...
February 2018: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/29487868/the-reliability-and-validity-of-a-modified-squat-test-to-predict-cardiopulmonary-fitness-in-healthy-older-men
#9
Chiu-Ping Yeh, Hsien-Cheng Huang, Yaju Chang, Ming-De Chen, Miaoju Hsu
Background: Shortcomings are noted in currently available cardiopulmonary field tests for the older adult and thus relevant research is still ongoing. Purpose: The purpose of this study was to investigate the reliability and validity of a modified squat test and to establish a regression model for predicting aerobic fitness in the older adult. Methods: Twenty-five healthy men aged 60 to 75 years completed this study. Each subject performed two modified squat tests with a prototype testing equipment and a maximal exercise test to determine maximal oxygen consumption...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29466079/passive-recovery-reduces-fatigue-during-repeated-change-of-direction-sprints-in-basketball-players
#10
Maria C Madueno, Vincent J Dalbo, Joshua H Guy, Kate E Giamarelos, Tania Spiteri, Aaron T Scanlan
PURPOSE: To investigate the physiological and performance effects of active and passive recovery between repeated-change-of-direction (RCOD) sprints. METHODS: Eight semi-professional basketball players (age: 19.9 ± 1.5 yr; stature: 183.0 ± 9.6 cm; body mass: 77.7 ± 16.9 kg; body fat: 11.8 ± 6.3%; VO2peak : 46.1 ± 7.6 mL·kg-1 ·min-1 ) completed 12 x 20-m RCOD sprints (Agility 5-0-5 Tests) interspersed with 20 s of active (50% maximal aerobic speed) or passive recovery in a randomized cross-over design...
February 21, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29356348/skeletal-muscle-ex-vivo-mitochondrial-respiration-parallels-decline-in-vivo-oxidative-capacity-cardiorespiratory-fitness-and-muscle-strength-the-baltimore-longitudinal-study-of-aging
#11
Marta Gonzalez-Freire, Paul Scalzo, Jarod D'Agostino, Zenobia A Moore, Alberto Diaz-Ruiz, Elisa Fabbri, Ariel Zane, Brian Chen, Kevin G Becker, Elin Lehrmann, Linda Zukley, Chee W Chia, Toshiko Tanaka, Paul M Coen, Michel Bernier, Rafael de Cabo, Luigi Ferrucci
Mitochondrial function in human skeletal muscle declines with age. Most evidence for this decline comes from studies that assessed mitochondrial function indirectly, and the impact of such deterioration with respect to physical function has not been clearly delineated. We hypothesized that mitochondrial respiration in permeabilized human muscle fibers declines with age and correlates with phosphocreatine postexercise recovery rate (kPCr), muscle performance, and aerobic fitness. Mitochondrial respiration was assessed by high-resolution respirometry in saponin-permeabilized fibers from vastus lateralis muscle biopsies of 38 participants from the Baltimore Longitudinal Study of Aging (BLSA; 21 men, age 24-91 years) who also had available measures of peak oxygen consumption (VO2max ) from treadmill tests, gait speed in different tasks, 31 P magnetic resonance spectroscopy, isokinetic knee extension, and grip strength...
April 2018: Aging Cell
https://www.readbyqxmd.com/read/29326904/effects-of-habitual-smoking-on-cardiopulmonary-function-in-taekwondo-athletes
#12
Dong-Jin Jang, Hee-Cheol Kim, Jae-Kyung Kim, Sun-Young Jung, Dae-Young Kim
This study aimed to verify habitual smoking effects on cardiopulmonary function in taekwondo athletes. Subjects were university taekwondo athletes aged 20-24 years in nonsmoker (n= 9) and smoker (n= 6) groups. Subjects underwent an exercise examination for their ventilation threshold, minute ventilation, oxygen uptake, maximum volume of minute oxygen consumption, heart rate, and oxygen pulse during exercise and 1, 3, and 5 min after maximum exercise. The time of reaching the ventilation threshold was significantly higher in nonsmokers than in smokers...
December 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/29324474/active-and-inactive-leg-hemodynamics-during-sequential-single-leg-interval-cycling
#13
Nicole Gordon, Chris R Abbiss, Mohammed Ihsan, Andrew J Maiorana, Jeremiah J Peiffer
INTRODUCTION: Leg order during sequential single-leg cycling (i.e. exercising both legs independently within a single session) may affect local muscular responses potentially influencing adaptations. This study examined the cardiovascular and skeletal muscle hemodynamic responses during double-leg and sequential single-leg cycling. METHODS: Ten young healthy adults (28 ± 6 y) completed six 1-min double-leg intervals interspersed with one minute of passive recovery and, on a separate occasion, 12 (six with one leg followed by six with the other leg) 1-min single-leg intervals interspersed with one minute of passive recovery...
January 11, 2018: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29290363/flavanol-rich-cocoa-consumption-enhances-exercise-induced-executive-function-improvements-in-humans
#14
Hayato Tsukamoto, Tadashi Suga, Aya Ishibashi, Saki Takenaka, Daichi Tanaka, Yoshitaka Hirano, Takafumi Hamaoka, Kazushige Goto, Kumiko Ebi, Tadao Isaka, Takeshi Hashimoto
OBJECTIVE: Aerobic exercise is known to acutely improve cognitive functions, such as executive function (EF) and memory function (MF). Additionally, consumption of flavanol-rich cocoa has been reported to acutely improve cognitive function. The aim of this study was to determine whether high cocoa flavanol (CF; HCF) consumption would enhance exercise-induced improvement in cognitive function. To test this hypothesis, we examined the combined effects of HCF consumption and moderate-intensity exercise on EF and MF during postexercise recovery...
February 2018: Nutrition
https://www.readbyqxmd.com/read/29286508/tissue-breathing-and-topology-of-rats-thymocytes-surface-under-acute-total-%C3%AE-irradiation
#15
I A Nikitina, A I Gritsuk
OBJECTIVE: Assessment of the effect of single total γ irradiation to the parameters of mitochondrial oxidation and the topology of the thymocyte surface. MATERIALS AND METHODS: The study was performed in sexually mature white outbreeding male rats divided into three groups: two experimental and one control. The states of energy metabolism were determined by the rate of oxygen consumption by the thymus tissues on endogenous substrates at the presence of 2,4 dinitrophenol, uncoupler of a tissue breathing (TB) and oxidative phosphorylation (OP) after a single total γ irradiation at a dose of 1...
December 2017: Problemy Radiat︠s︡iĭnoï Medyt︠s︡yny Ta Radiobiolohiï
https://www.readbyqxmd.com/read/29261437/recovery-responses-to-maximal-exercise-in-healthy-weight-children-and-children-with-obesity
#16
Elizabeth A Easley, W Scott Black, Alison L Bailey, Terry A Lennie, Wilma J Sims, Jody L Clasey
PURPOSE: The purpose of this study was to examine differences in heart rate recovery (HRRec) and oxygen consumption recovery (VO2 recovery) between young healthy-weight children and children with obesity following a maximal volitional graded exercise test (GXTmax). METHOD: Twenty healthy-weight children and 13 children with obesity completed body composition testing and performed a GXTmax. Immediately after the GXTmax, HRRec and VO2 recovery were measured each minute for 5 consecutive minutes...
March 2018: Research Quarterly for Exercise and Sport
https://www.readbyqxmd.com/read/29250845/fitness-related-differences-in-the-rate-of-whole-body-total-heat-loss-in-exercising-young-healthy-women-are-heat-load-dependent
#17
Dallon T Lamarche, Sean R Notley, Martin P Poirier, Glen P Kenny
NEW FINDINGS: What is the central question of this study? Aerobic fitness modulates heat loss, albeit the heat load at which fitness-related differences occur in young healthy women remains unclear. What is the main finding and its importance? We demonstrate using direct calorimetry that fitness modulates heat loss in a heat-load dependent manner, with differences occurring between young women of low and high fitness and matched physical characteristics when the metabolic heat load is at least 400 W in hot, dry conditions...
March 1, 2018: Experimental Physiology
https://www.readbyqxmd.com/read/29190751/acute-effect-of-dietary-nitrate-on-forearm-muscle-oxygenation-blood-volume-and-strength-in-older-adults-a-randomized-clinical-trial
#18
RANDOMIZED CONTROLLED TRIAL
Gustavo Vieira de Oliveira, Marina Morgado, Carlos Adam Conte-Junior, Thiago Silveira Alvares
Both recovery time of post-exercise muscle oxygenation and muscle strength decline with aging. Although beetroot consumption has been shown to improve muscle oxygenation and exercise performance in adults, these effects in the elderly has not been addressed. The aim of the present study was to evaluate the effect of a beetroot-based gel (BG) on muscle O2 saturation, blood volume (tHb) and handgrip strength in the elderly in response to handgrip exercise. In a randomized crossover double-blind design, twelve older subjects consumed BG (100 g of beetroot-based gel containing ~ 12 mmol nitrate) or PLA (100 g of nitrate-depleted gel nitrate-depleted)...
2017: PloS One
https://www.readbyqxmd.com/read/29114503/effects-of-long-or-short-duration-stimulus-during-high-intensity-interval-training-on-physical-performance-energy-intake-and-body-composition
#19
Elaine Domingues Alves, Gabriela Pires Salermo, Valéria Leme Gonçalves Panissa, Emerson Franchini, Monica Yuri Takito
To compare the effects of 6 weeks of long or short high-intensity interval training (long- or short-HIIT) on body composition, hunger perception, food intake and rating of perceived exertion (RPE). Twenty previously untrained women (25±5 years) were randomly assigned to do a long-HIIT (n=10) or a short-HIIT (n=10). The long-HIIT group performed fifteen 1-min bouts at 90% of maximum heart rate (HRmax), interspersed by 30-sec active recovery (60% HRmax). The short-HIIT group performed forty-five 20-sec bouts at 90% of HRmax, interspersed by 10-sec active recovery (60% HRmax)...
August 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/29091471/the-effect-of-a-dietary-nitrate-supplementation-in-the-form-of-a-single-shot-of-beetroot-juice-on-static-and-dynamic-apnoea-performance
#20
Matthew J Barlow, Antonis Elia, Oliver M Shannon, Angeliki Zacharogianni, Angelica Lodin-Sundstrom
INTRODUCTION: The purpose of the present study was to assess the effects of acute nitrate (NO3 - )-rich beetroot juice supplementation on peripheral oxygen saturation (Sp O2 ), heart rate (HR), and pulmonary gas exchange during submaximal static and dynamic apnoea. METHODS: Nine (six male, three female) trained apneists (age: 39.6 ± 8.2 years, stature: 170.4 ± 11.5cm, body mass: 72.0 ± 11.5 kg) performed three submaximal static apnoeas at 60%, 70% and 80% of the participant's current reported personal best time, followed by three submaximal (~ 75% or personal best distance) dynamic apnoeas following the consumption of either a 140 ml concentrated NO3 - -rich beetroot juice (BRJ; 7...
November 1, 2017: International Journal of Sport Nutrition and Exercise Metabolism
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