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https://www.readbyqxmd.com/read/28630571/predictive-variables-of-half-marathon-performance-for-male-runners
#1
Josué Gómez-Molina, Ana Ogueta-Alday, Jesus Camara, Christoper Stickley, José A Rodríguez-Marroyo, Juan García-López
The aims of this study were to establish and validate various predictive equations of half-marathon performance. Seventy-eight half-marathon male runners participated in two different phases. Phase 1 (n = 48) was used to establish the equations for estimating half-marathon performance, and Phase 2 (n = 30) to validate these equations. Apart from half-marathon performance, training-related and anthropometric variables were recorded, and an incremental test on a treadmill was performed, in which physiological (VO2max, speed at the anaerobic threshold, peak speed) and biomechanical variables (contact and flight times, step length and step rate) were registered...
June 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28625356/prognostic-markers-of-outcome-in-patients-undergoing-infra-inguinal-revascularisation-a-prospective-observational-pilot-study
#2
M Kanakaraj, D R Yates, R J T Wilson, M L Baroni, S J Davies
OBJECTIVES: The aim was to investigate whether cardiopulmonary exercise testing (CPET) variables derived from cycle and arm ergonometry correlate, and whether CPET variables and pre-operative N-terminal pro-brain natriuretic peptide (NT-proBNP) have prognostic significance and if the combination of the two has incremental value. METHODS: A prospective observational pilot study was conducted; 70 patients who underwent infra-inguinal bypass surgery were recruited...
June 15, 2017: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/28618202/effects-of-persistent-fontan-fenestration-patency-on-cardiopulmonary-exercise-testing-variables
#3
M Elisabeth Heal, Lanier B Jackson, Andrew M Atz, Ryan J Butts
Cardiopulmonary exercise testing (CPET) aids in clinical assessment of patients with Fontan circulation. Effects of persistent fenestration on CPET variables have not been clearly defined. Associations between fenestration and CPET variables at anaerobic threshold (AT) and peak exercise were explored in the Pediatric Heart Network Fontan Cross-Sectional Study cohort. Fenestration patency was associated with a greater decrease in oxygen saturation from rest to peak exercise (fenestration -4.9 ± 3.8 v. nonfenestration -3 ± 3...
June 15, 2017: Congenital Heart Disease
https://www.readbyqxmd.com/read/28617869/statins-are-related-to-impaired-exercise-capacity-in-males-but-not-females
#4
Martin Bahls, Stefan Groß, Till Ittermann, Raila Busch, Sven Gläser, Ralf Ewert, Henry Völzke, Stephan B Felix, Marcus Dörr
BACKGROUND: Exercise and statins reduce cardiovascular disease (CVD). Exercise capacity may be assessed using cardiopulmonary exercise testing (CPET). Whether statin medication is associated with CPET parameters is unclear. We investigated if statins are related with exercise capacity during CPET in the general population. METHODS: Cross-sectional data of two independent cohorts of the Study of Health in Pomerania (SHIP) were merged (n = 3,500; 50% males). Oxygen consumption (VO2) at peak exercise (VO2peak) and anaerobic threshold (VO2@AT) was assessed during symptom-limited CPET...
2017: PloS One
https://www.readbyqxmd.com/read/28617377/-pharmacological-treatment-of-patients-with-chronic-fatigue-syndrome
#5
O S Glazachev, Е N Dudnik, E E Zagaynaya
AIM: To evaluate the efficacy and safety of human placenta extract - laennec infusions in the treatment of patients with confirmed diagnosis of 'Chronic fatigue syndrome' (CFS). MATERIAL AND METHODS: The study included 38 patients with CFS, randomized into 2 groups: patients of the experimental group (EG, n=24) were treated with 10 intravenous laennec infusions, 4 ml each, 2 times/week, for 5 weeks. The control group (CG) consisted of 14 patients. Treatment efficacy evaluated by the severity of chronic fatigue ('The degree of chronic fatigue' questionnaire), state anxiety, depression and anger (Spilberger test) and quality of life (SF-36v2), exercise tolerance (cardiopulmonary exercise test with gas analysis), blood parameters were assessed before, after, and 5 weeks of follow-up...
2017: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/28597620/critical-velocity-in-swimmers-of-different-ages
#6
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/28596080/physical-strain-a-new-perspective-on-walking-in-cerebral-palsy
#7
Astrid Cj Balemans, Eline Bolster, Merel-Anne Brehm, Annet J Dallmeijer
OBJECTIVE: The objectives of this study in children and adolescents with cerebral palsy (CP) were to 1) describe physical strain of walking, 2) describe the proportion of participants walking above the anaerobic threshold and 3) describe 4 phenotypes of physical strain of walking based on deviations in aerobic capacity and walking energy cost (EC). DESIGN: Cohort SETTING: Academic medical center PARTICIPANTS: Thirty-seven participants (13y5mo(4y0mo)) with CP (Gross Motor Function Classification System (GMFCS) levels I[n=13], II[N=17] and III[N=7]) and 20 typically developing participants (TD) (11y8mo(3y5mo))...
June 5, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28583436/serum-levels-of-fatty-acid-binding-protein-4-and-fat-metabolic-markers-in-relation-to-catecholamines-following-exercise
#8
Tatsuya Iso, Hiroaki Sunaga, Hiroki Matsui, Shu Kasama, Naomi Oshima, Hikari Haruyama, Nozomi Furukawa, Kiyomi Nakajima, Tetsuo Machida, Masami Murakami, Tomoyuki Yokoyama, Masahiko Kurabayashi
BACKGROUND: Lipolysis is stimulated by activation of adrenergic inputs to adipose tissues. Our recent study showed that serum concentrations of fatty acid binding protein 4 (FABP4) are robustly elevated in patients with acute myocardial infarction and ventricular tachyarrhythmia, that display a marked activation of the sympathetic nervous system (SNS). However, it remains unknown whether circulating FABP4 concentrations are associated with exercise-induced SNS activation. METHODS: Thirty one healthy volunteers underwent cardiopulmonary exercise testing on a cycle ergometer up to the workload levels below and above anaerobic threshold, low- and high-intensity exercise, respectively...
June 2, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28566737/sex-specific-cardiopulmonary-exercise-testing-parameters-as-predictors-in-patients-with-idiopathic-pulmonary-arterial-hypertension
#9
Ping Yuan, Hui-Juan Ni, Tian-Xiang Chen, Bigyan Pudasaini, Rong Jiang, Hui Liu, Qin-Hua Zhao, Lan Wang, Su-Gang Gong, Jin-Ming Liu
Cardiopulmonary exercise testing (CPET) has been used for prognosis in idiopathic pulmonary arterial hypertension (IPAH). We explored whether sex differences had an impact on prognostic assessments of CPET in IPAH. Data were retrieved from 21 male and 36 female incident IPAH patients who underwent both right heart catheterization and CPET from 2010 to 2016 at Shanghai Pulmonary Hospital. Cox proportional hazards analysis was used to assess the prognostic value of CPET. The mean duration of follow-up was 22±15 months...
June 1, 2017: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/28560485/evaluation-of-end-tidal-co2-pressure-at-the-anaerobic-threshold-for-detecting-and-assessing-pulmonary-hypertension
#10
Akifumi Higashi, Yoshihiro Dohi, Sayuri Yamabe, Hiroki Kinoshita, Yoshiharu Sada, Toshiro Kitagawa, Takayuki Hidaka, Satoshi Kurisu, Hideya Yamamoto, Yuji Yasunobu, Yasuki Kihara
Cardiopulmonary exercise testing (CPET) is useful for the evaluation of patients with suspected or confirmed pulmonary hypertension (PH). End-tidal carbon dioxide pressure (PETCO2) during exercise is reduced with elevated pulmonary artery pressure. However, the utility of ventilatory parameters such as CPET for detecting PH remains unclear. We conducted a review in 155 patients who underwent right heart catheterization and CPET. Fifty-nine patients had PH [mean pulmonary arterial pressure (mPAP) ≥25 mmHg]...
May 30, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/28553994/the-repeated-bout-effect-of-traditional-resistance-exercises-on-running-performance-across-three-bouts
#11
Kenji Doma, Moritz Schumann, Anthony S Leicht, Brian Edward Heilbronn, Felipe Damas, Dean Burt
Purpose This study investigated the repeated bout effect of three typical lower-body resistance training (RT) sessions on maximal and sub-maximal effort running performance. Methods Twelve resistance-untrained men (age 24±4 years; height 1.81±0.10 m; body mass 79.3±10.9 kg; VO2peak 48.2±6.5 mL∙kg-1∙min-1; six-repetition maximum squat 71.7±12.2kg) undertook three bouts of RT sessions at six-repetition maximum. Counter-movement-jump (CMJ), lower-body ROM, muscle soreness and creatine kinase (CK) were examined prior to (T0), immediately-post (T1), 24 (T24) and 48 (T48) h post each RT bout...
May 29, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28550471/blood-lactate-accumulation-decreases-during-the-slow-component-of-oxygen-uptake-without-a-decrease-in-muscular-efficiency
#12
J M O'Connell, J M Weir, B R MacIntosh
Pulmonary oxygen uptake ([Formula: see text]) slowly increases during exercise above the anaerobic threshold, and this increase is called the slow component of [Formula: see text]. The mechanism of the increase in [Formula: see text] is assumed to be due to increasing energy cost associated with increasingly inefficient muscle contraction. We hypothesized that the increase in [Formula: see text] would be accompanied by a constant or increasing rate of accumulation of blood lactate, indicating sustained anaerobic metabolism while [Formula: see text] increased...
May 26, 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/28528994/clinical-significance-of-the-overshoot-phenomena-of-respiratory-gas-indices-during-recovery-from-maximal-exercise-testing
#13
Yuta Takayanagi, Akira Koike, Osamu Nagayama, Arisa Nagamine, Rujie Qin, Jo Kato, Isao Nishi, Tomoko Himi, Yuko Kato, Akira Sato, Takeshi Yamashita, Kazutaka Aonuma
BACKGROUND: Overshoot phenomena of the gas exchange ratio (R:VCO2/VO2), ventilatory equivalent for O2 (VE/VO2), and end-tidal O2 pressure (PETO2) are commonly observed during recovery from maximal cardiopulmonary exercise testing (CPX). We investigated the clinical significance of the overshoots of these indices by comparing their magnitudes between healthy subjects and cardiac patients with left ventricular dysfunction. METHODS: In total, 121 subjects (73 healthy subjects and 48 cardiac patients with left ventricular ejection fraction<40%) who underwent CPX and achieved peak R≥1...
May 18, 2017: Journal of Cardiology
https://www.readbyqxmd.com/read/28522658/effect-of-fontan-geometry-on-exercise-haemodynamics-and-its-potential-implications
#14
Elaine Tang, Zhenglun Alan Wei, Kevin K Whitehead, Reza H Khiabani, Maria Restrepo, Lucia Mirabella, James Bethel, Stephen M Paridon, Bradley S Marino, Mark A Fogel, Ajit P Yoganathan
OBJECTIVE: Exercise intolerance afflicts Fontan patients with total cavopulmonary connections (TCPCs) causing a reduction in quality of life. Optimising TCPC design is hypothesised to have a beneficial effect on exercise capacity. This study investigates relationships between TCPC geometries and exercise haemodynamics and performance. METHODS: This study included 47 patients who completed metabolic exercise stress test with cardiac magnetic resonance (CMR). Phase-contrast CMR images were acquired immediately following supine lower limb exercise...
May 18, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28515794/influence-of-a-home-based-exercise-program-on-the-urine-ph-in-elderly-female-subjects-a-secondary-analysis-of-a-randomized-controlled-trial
#15
Yuichiro Nishida, Keitaro Tanaka, Megumi Hara, Noriko Hirao, Hiroaki Tanaka, Takuro Tobina, Masaharu Ikeda, Hiroshi Yamato, Masanori Ohta
BACKGROUND: A low urine pH is a characteristic metabolic feature of metabolic syndrome and type 2 diabetes. The purpose of the current study was to investigate the effects of a 12-week home-based bench step exercise on the urine pH status of elderly female subjects. METHODS: The current study is a secondary analysis of a randomized controlled trial (RCT) in which 59 postmenopausal female subjects were randomized to either the exercise group (n = 29) or the control group (n = 30)...
2017: European Review of Aging and Physical Activity
https://www.readbyqxmd.com/read/28511024/cardiopulmonary-exercise-testing-and-surgery
#16
Paul O Older, Denny Zh Levett
The surgical patient population is increasingly elderly and comorbid and poses challenges to perioperative physicians. Accurate pre-operative risk stratification is important to direct perioperative care. Reduced aerobic fitness is associated with increased post-operative morbidity and mortality. Cardiopulmonary exercise testing is an integrated and dynamic test that gives an objective measure of aerobic fitness or functional capacity and identifies the cause of exercise intolerance. Cardiopulmonary exercise testing provides an individualized estimate of patient risk that can be used to predict post-operative morbidity and mortality...
May 16, 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28510737/total-haemoglobin-mass-but-not-haemoglobin-concentration-is-associated-with-preoperative-cardiopulmonary-exercise-testing-derived-oxygen-consumption-variables
#17
J M Otto, J O M Plumb, D Wakeham, E Clissold, L Loughney, W Schmidt, H E Montgomery, M P W Grocott, T Richards
Background: Cardiopulmonary exercise testing (CPET) measures peak exertional oxygen consumption ( V˙O2peak ) and that at the anaerobic threshold ( V˙O2 at AT, i.e. the point at which anaerobic metabolism contributes substantially to overall metabolism). Lower values are associated with excess postoperative morbidity and mortality. A reduced haemoglobin concentration ([Hb]) results from a reduction in total haemoglobin mass (tHb-mass) or an increase in plasma volume. Thus, tHb-mass might be a more useful measure of oxygen-carrying capacity and might correlate better with CPET-derived fitness measures in preoperative patients than does circulating [Hb]...
May 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/28492701/short-term-intensive-training-attenuates-the-exercise-induced-interaction-of-mono-1-2-cells-and-platelets-after-coronary-bypass-in-cardiac-patients
#18
Shu-Chun Huang, Mei-Kuen Wong, Pyng-Jing Lin, Feng-Chun Tsai, Jaw-Ji Chu, Meng-Yu Wu, Tieh-Cheng Fu, Jong-Shyan Wang
The interaction between platelets and monocytes plays a critical role in the pathogenesis and progression of cardiovascular diseases. This study investigated how short-term intensive training (SIT) influences monocyte subset characteristics and exercise-induced monocyte and platelet aggregates (MPAs) following elective coronary bypass (CABG) in cardiac patients. Forty-nine patients hospitalised for CABG were randomised into SIT (N=26) and conventional training (CT, N=23) groups. The SIT subjects underwent supervised aerobic training at 80~120 % of the ventilatory anaerobic threshold based on sub-maximal exercise tests performed 7 days post-CABG for 20 sessions with two sessions/day and 30 min/session, which were completed within four weeks after surgery...
May 11, 2017: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/28488137/acute-effects-of-high-intensity-interval-training-and-moderate-intensity-continuous-training-sessions-on-cardiorespiratory-parameters-in-healthy-young-men
#19
Gustavo Zaccaria Schaun, Cristine Lima Alberton, Diego Oliveira Ribeiro, Stephanie Santana Pinto
PURPOSE: The aim of the present study was to compare the energy expenditure (EE) during and after two treadmill protocols, high-intensity interval training (HIIT) and moderate continuous training (CONT), in young adult men. METHODS: The sample was comprised by 26 physically active men aged between 18 and 35 years engaged in aerobic training programs. They were divided into two groups: HIIT (n = 14) which performed eight 20 s bouts at 130% of the velocity associated with the maximal oxygen consumption on a treadmill with 10 s of passive rest, or CONT (n = 12) which performed 30 min running on a treadmill at a submaximal velocity equivalent to 90-95% of the heart rate associated with the anaerobic threshold...
May 9, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28469751/physiological-acute-response-to-high-intensity-intermittent-and-moderate-intensity-continuous-5-km-running-performance-implications-for-training-prescription
#20
Carolina Cabral-Santos, José Gerosa-Neto, Daniela S Inoue, Fabrício E Rossi, Jason M Cholewa, Eduardo Z Campos, Valéria L G Panissa, Fábio S Lira
The aim of this study was to investigate the physiological responses to moderate-intensity continuous and high-intensity intermittent exercise. Twelve physically active male subjects were recruited and completed a 5-km run on a treadmill in two experimental sessions in randomized order: continuously (70% sVO2max) and intermittently (1:1 min at sVO2max). Oxygen uptake, excess post-exercise oxygen consumption, lactate concentration, heart rate and rating of perceived exertion data were recorded during and after each session...
February 2017: Journal of Human Kinetics
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