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lactate and training

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https://www.readbyqxmd.com/read/28644243/role-of-breathing-conditions-during-exercise-testing-on-training-prescription-in-chronic-obstructive-pulmonary-disease
#1
Daniel Neunhäuserer, Eva Steidle-Kloc, Marco Bergamin, Gertraud Weiss, Andrea Ermolao, Bernd Lamprecht, Michael Studnicka, Josef Niebauer
This study investigated whether different breathing conditions during exercise testing will influence measures of exercise capacity commonly used for training prescription in chronic obstructive pulmonary disease. Twenty-seven patients with chronic obstructive pulmonary disease (forced expiratory volume in 1 sec = 45.6 [9.4]%) performed three maximal exercise tests within 8 days, but at least 48 hrs apart. Subjects were thereby breathing either room air through a tightly fitting face mask like during any cardiopulmonary exercise test (MASK), room air without mask (No-MASK), or 10 l/min of oxygen via nasal cannula (No-MASK + O2)...
June 21, 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28642717/the-lactate-minimum-test-concept-methodological-aspects-and-insights-for-future-investigations-in-human-and-animal-models
#2
REVIEW
Leonardo H D Messias, Claudio A Gobatto, Wladimir R Beck, Fúlvia B Manchado-Gobatto
In 1993, Uwe Tegtbur proposed a useful physiological protocol named the lactate minimum test (LMT). This test consists of three distinct phases. Firstly, subjects must perform high intensity efforts to induce hyperlactatemia (phase 1). Subsequently, 8 min of recovery are allowed for transposition of lactate from myocytes (for instance) to the bloodstream (phase 2). Right after the recovery, subjects are submitted to an incremental test until exhaustion (phase 3). The blood lactate concentration is expected to fall during the first stages of the incremental test and as the intensity increases in subsequent stages, to rise again forming a "U" shaped blood lactate kinetic...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28639443/relationship-between-the-handball-specific-complex-test-nonspecific-field-tests-and-the-match-performance-score-in-elite-professional-handball-players
#3
Souhail Hermassi, Mohamed S Chelly, Rainer Wollny, Birgit Hoffmeyer, Georg Fieseler, Stephan Schulze, Lars Irlenbusch, Karl-Stefan Delank, Roy J Shephard, Thomas Bartels, René Schwesig
BACKGROUND: This study assessed the validity of the handball-specific complex-test (HBCT) and two nonspecific field tests in professional elite handball athletes, using the match performance score (MPS) as the gold standard of performance. METHODS: Thirteen elite male handball players (age: 27.4 ± 4.8 years; premier German league) performed the HBCT, the Yo-Yo Intermittent Recovery Test (Yo-Yo-IR1-test) and a repeated shuttle sprint ability (RSA) test at the beginning of pre-season training...
June 21, 2017: Journal of Sports Medicine and Physical Fitness
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
#4
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/28630575/acute-and-post-exercise-physiological-responses-to-high-intensity-interval-training-in-endurance-and-sprint-athletes
#5
Lukas Cipryan, Gerhard Tschakert, Peter Hofmann
The purpose of the presented study was to compare acute and post-exercise differences in cardiorespiratory, metabolic, cardiac autonomic, inflammatory and muscle damage responses to high-intensity interval exercise (HIIT) between endurance and sprint athletes. The study group consisted of sixteen highly-trained males (age 22.1 ± 2.5 years) participating in endurance (n = 8) or sprint (n = 8) sporting events. All the participants underwent three exercise sessions: short HIIT (work interval duration 30s), long HIIT (3min) and constant load exercise (CE)...
June 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28624292/the-use-of-non-prescription-medicines-during-lactation-a-qualitative-study-of-community-pharmacists-attitudes-and-perspectives
#6
Tin Fei Sim, H Laetitia Hattingh, Jillian Sherriff, Lisa B G Tee
BACKGROUND: Community pharmacists play a significant role in the provision of non-prescription medicines. There is evidence that women self-medicate and use non-prescription medicines whilst breastfeeding. Studies have demonstrated that breastfeeding women are likely to seek advice from pharmacists, presenting a unique opportunity for pharmacists to provide on-going support of these women especially in relation to the appropriate use of non-prescription medicines. OBJECTIVES: This study aimed to explore community pharmacists' attitudes and perspectives towards the use of non-prescription medicines during breastfeeding...
June 10, 2017: Research in Social & Administrative Pharmacy: RSAP
https://www.readbyqxmd.com/read/28622665/non-invasive-in-situ-measurement-of-blood-lactate-using-microwave-sensors
#7
Alex Mason, Olga Korostynska, Julien Louis, Luis Eduardo Cordova-Lopez, Badr Abdullah, Jacob Greene, Rob Connell, John Hopkins
GOAL: This paper reports the use of a novel electromagnetic sensor technique for real-time non-invasive monitoring of blood lactate in human subjects. METHODS: The technique was demonstrated on 34 participants who undertook a cycling regime, with rest period before and after, to produce a rising and falling lactate response curve. Sensors attached to the arm and legs of participants gathered spectral data, blood samples were measured using a Lactate Pro V2, as well as temperature and heart rate data were collected...
June 14, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28622081/effects-of-inspiratory-muscle-training-in-professional-women-football-players-a-randomized-sham-controlled-trial
#8
Bruno Archiza, Daniela Kuguimoto Andaku, Flávia Cristina Rossi Caruso, José Carlos Bonjorno, Cláudio Ricardo de Oliveira, Paula Angélica Ricci, André Capaldo do Amaral, Stela Márcia Mattiello, Cleiton Augusto Libardi, Shane A Phillips, Ross Arena, Audrey Borghi-Silva
This study was conducted to determine the effects of inspiratory muscle training (IMT) on respiratory and peripheral muscles oxygenation during a maximal exercise tolerance test and on repeated-sprint ability (RSA) performance in professional women football players. Eighteen athletes were randomly assigned to one of the following groups: SHAM (n = 8) or IMT (n = 10). After a maximal incremental exercise test, all participants performed (on a different day) a time-to-exhaustion (Tlim) test. Peripheral and respiratory muscles oxygenation by near-infrared spectroscopy, breath-by-breath ventilatory and metabolic variables, and blood lactate concentration were measured...
June 16, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28619292/psychophysiological-response-in-parachute-jumps-the-effect-of-experience-and-type-of-jump
#9
Vicente Javier Clemente-Suárez, José Juan Robles-Pérez, Jesús Fernández-Lucas
We aimed to analyse the effect of experience and type of parachute jump on the psychophysiological responses of jumpers. We analysed blood oxygen saturation, heart rate, blood glucose, lactate and creatinkinase, leg strength, isometric hand strength, cortical arousal, specific fine motor skills, self-confidence and cognition, and somatic and state anxiety, before and after four different parachute jumps: a sport parachute jump, a manual tactical parachute jump, tandem pilots, and tandem passengers. Independently of the parachute jump, the psychophysiological responses of experienced paratroopers were not affected by the jumps, except for an increase in anaerobic metabolism...
June 13, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28611674/is-marathon-training-harder-than-the-ironman-training-an-eco-method-comparison
#10
Jonathan Esteve-Lanao, Diego Moreno-Pérez, Claudia A Cardona, Eneko Larumbe-Zabala, Iker Muñoz, Sergio Sellés, Roberto Cejuela
Purpose: To compare the absolute and relative training load of the Marathon (42k) and the Ironman (IM) training in recreational trained athletes. Methods: Fifteen Marathoners and Fifteen Triathletes participated in the study. Their performance level was the same relative to the sex's absolute winner at the race. No differences were presented neither in age, nor in body weight, height, BMI, running VO2max max, or endurance training experience (p > 0.05). They all trained systematically for their respective event (IM or 42k)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28605210/pacing-strategy-during-simulated-mountain-bike-racing
#11
Bruno Ferreira Viana, Flávio Oliveira Pires, Allan Inoue, Tony Meireles Santos
Cross-country mountain biking (XCO) is a popular high-intensity cycling endurance event, however, XCO pacing strategy has not been fully examined. This study examined the pacing strategies of different XCO athletes, during a laboratory-simulated XCO performance test. Brazilian cyclists classified as performance cohort level three (PL3-trained) performed an XCO race simulation. The simulation consisted of four 10 km laps with a gradient of 0-10%. No group vs. time interaction was found in lap time (P = 0.169), absolute (P = 0...
June 12, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28597620/critical-velocity-in-swimmers-of-different-ages
#12
Alex Rizzato, Giuseppe Marcolin, Alessandro Rubini, Nicola Olivato, Simone Fava, Antonio Paoli, Gerardo Bosco
BACKGROUND: In swimming one of the most employed training speed among coaches is the non-invasive Theoretical Critical Velocity (TCV) defined as the velocity that can be maintained continuously without exhaustion. METHODS: We calculated the 4mmol/L lactate Critical Velocity (MCV) in a group of swimmers of different ages (Young, Elite and Master), and compared results to the predicted TCV defined starting from the 200 and 400 m freestyle best seasonal performances...
June 8, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28596738/intensity-and-duration-based-options-to-regulate-endurance-training
#13
Peter Hofmann, Gerhard Tschakert
The regulation of endurance training is usually based on the prescription of exercise intensity. Exercise duration, another important variable of training load, is rarely prescribed by individual measures and mostly set from experience. As the specific exercise duration for any intensity plays a substantial role regarding the different kind of cellular stressors, degree, and kind of fatigue as well as training effects, concepts integrating the prescription of both intensity and duration within one model are needed...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28583927/the-effects-of-moderate-intensity-training-in-a-hypoxic-environment-on-transcriptional-responses-in-thoroughbred-horses
#14
Allan J Davie, Li Wen, Andrew R E Cust, Rosalind Beavers, Tom Fyfe, Shi Zhou
This study investigated the effects of six weeks of normobaric hypoxic training on transcriptional expression of the genes associated with mitochondrial and glycolytic activities in Thoroughbred horses. Eight horses were divided into two groups of four. They completed an identical incremental, moderate intensity training program, except that one group trained in a hypoxic chamber with 15% oxygen for 30 minutes on alternate days except Sundays (HT), while the other group trained in normal air (NC). Prior to and post the training, heart rate and blood lactate were measured during an incremental treadmill test...
June 5, 2017: Biology Open
https://www.readbyqxmd.com/read/28582899/effect-of-whole-body-vibration-on-lactate-level-recovery-and-heart-rate-recovery-in-rest-after-intense-exercise
#15
Seung Rok Kang, Jin-Young Min, Changho Yu, Tae-Kyu Kwon
OBJECTIVE: In this paper, we investigated the recovery of the lactate level, muscular fatigue, and heart rate recovery (HRR) with respect to whole body vibration (WBV) during the rest stage after a gait exercise. METHODS: A total of 24 healthy subjects with no medical history of exercise injury participated. The participants were divided into a training group with vibration during rest and a control group with the same conditions but without vibration. The subjects performed a gait exercise with a slope of 15% and velocity of 4 km/h to consume 450 kcal in 30 min...
May 19, 2017: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/28575921/endurance-exercise-in-hypoxia-hyperoxia-and-normoxia-mitochondrial-and-global-adaptations
#16
Axel Przyklenk, Boris Gutmann, Thorsten Schiffer, Wildor Hollmann, Heiko K Strueder, Wilhelm Bloch, Andreas Mierau, Sebastian Gehlert
We hypothesized short-term endurance exercise (EN) in hypoxia (HY) to exert decreased mitochondrial adaptation, peak oxygen consumption (VO2peak) and peak power output (PPO) compared to EN in normoxia (NOR) and hyperoxia (PER). 11 male subjects performed repeated unipedal cycling EN in HY, PER, and NOR over 4 weeks in a cross-over design. VO2peak, PPO, rate of perceived exertion (RPE) and blood lactate (Bla) were determined pre- and post-intervention to assess physiological demands and adaptation. Skeletal muscle biopsies were collected to determine molecular mitochondrial signaling and adaptation...
June 2, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28570496/the-effect-of-training-load-distribution-on-aerobic-fitness-measures-in-hurling-players
#17
Shane Malone, Brian Hughes, Kieran Collins
The aim of the current investigation was to quantify the training intensity distribution of hurling players and their association to changes in aerobic fitness measures within hurling players. Thirty hurling players (n = 30; age 25.5 ± 3.2 years; height 178.9 ± 3.2 cm; body mass 78.5 30 ± 4.5 kg) were observed during the pre-championship training period (12 weeks). Aerobic fitness measures (VO2max), peak treadmill velocity (PVT; km·h) and heart rates (HR) at 2 and 4 mmol·L blood-lactate concentrations, Yo-Yo intermittent recovery test performance (Yo-YoIR1) were assessed pre and post the training period...
May 30, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28569202/a-health-partnership-to-reduce-neonatal-mortality-in-four-hospitals-in-rwanda
#18
Placide Ntigurirwa, Kathy Mellor, Daniel Langer, Mari Evans, Emily Robertson, Lisine Tuyisenge, Alan Groves, Tom Lissauer
BACKGROUND: A health partnership to improve hospital based neonatal care in Rwanda to reduce neonatal mortality was requested by the Rwandan Ministry of Health. Although many health system improvements have been made, there is a severe shortage of health professionals with neonatal training. METHODS: Following a needs assessment, a health partnership grant for 2 years was obtained. A team of volunteer neonatologists and paediatricians, neonatal nurses, lactation consultants and technicians with experience in Rwanda or low-income countries was assembled...
June 1, 2017: Globalization and Health
https://www.readbyqxmd.com/read/28566803/greater-muscle-damage-in-athletes-with-actn3-r577x-rs1815739-gene-polymorphism-after-an-ultra-endurance-race-a-pilot-study
#19
T Belli, A H Crisp, R Verlengia
In this study, we aimed to investigate the influence of ACTN3 R577X gene polymorphism on muscle damage responses in athletes competing in an ultra-endurance race. Twenty moderate to well-trained ultra-runners who had entered in an official 37.1 km adventure race (22.1 km mountain biking, 10.9 km trekking, 4.1 km water trekking, 30 m rope course, and orienteering) volunteered for the study. Blood samples were collected for genotyping and analysis of muscle protein levels before and after the race. Percentage changes (pre- to post-race) of serum myoglobin [XX = 5,377% vs...
June 2017: Biology of Sport
https://www.readbyqxmd.com/read/28542490/repeated-bouts-of-exhaustive-exercise-increase-circulating-cell-free-nuclear-and-mitochondrial-dna-without-development-of-tolerance-in-healthy-men
#20
Robert Stawski, Konrad Walczak, Piotr Kosielski, Pawel Meissner, Tomasz Budlewski, Gianluca Padula, Dariusz Nowak
OBJECTIVE: Acute single strenuous exercise increases circulating cell free DNA (cf DNA). We tested whether three repeated bouts of exhaustive exercise induced the cf DNA response without development of tolerance in healthy men. METHODS: Eleven average-trained men (age 34.0±5.2 years, body mass index 26.2±3.1 kg/m2, maximal oxygen consumption-VO2max 49.6±4.5 ml/kg*min) performed three treadmill exercise tests to exhaustion at speed corresponding to 70% VO2max separated by 72 hours of resting...
2017: PloS One
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