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Aerobic threshold

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https://www.readbyqxmd.com/read/28442632/effect-of-aerobic-exercise-training-on-ventilatory-efficiency-and-respiratory-drive-in-obese-subjects
#1
Mehdi Chlif, Anis Chaouachi, Said Ahmaidi
BACKGROUND: Obese patients show a decline in exercise capacity and diverse degrees of dyspnea in association with mechanical abnormalities, increased ventilatory requirements secondary to the increased metabolic load, and a greater work of breathing. Consequently, obese patients may be particularly predisposed to the development of respiratory muscle fatigue during exercise. The aim of this study was to assess inspiratory muscle performance during incremental exercise in 19 obese male subjects (body mass index 41 ± 6 kg/m(2)) after aerobic exercise training using the noninvasive, inspiratory muscle tension-time index (TT0...
April 25, 2017: Respiratory Care
https://www.readbyqxmd.com/read/28422851/relation-between-serum-myokines-and-phase-ii-cardiac-rehabilitation
#2
Der-Sheng Han, Ming-Yen Hsiao, Tyng-Guey Wang, Ssu-Yuan Chen, Wei-Shiung Yang
Patients with coronary heart disease or acute myocardial infarction after cardiac catheterization with stenting referred for phase II cardiac rehabilitation (CR) were grouped according to their preference. Cardio-pulmonary exercise testing (CPET) was used to determine oxygen uptake ((Equation is included in full-text article.)) at peak exercise and anaerobic threshold (AT). The control patients received counseling only while the experiment group received 36 sessions of CR in 3 to 6 months. Exercise physiology parameters and serum myokines (myostatin, insulin-like growth factor-1 (IGF-1), and interleukin-6 (IL-6) were measured pre- and postrehabilitation...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28410521/micropollutants-in-source-separated-wastewater-streams-and-recovered-resources-of-source-separated-sanitation
#3
A Butkovskyi, L Hernandez Leal, G Zeeman, H H M Rijnaarts
The quality of anaerobic sludge and struvite from black water treatment system, aerobic sludge from grey water treatment system and effluents of both systems was assessed for organic micropollutant content in order to ensure safety when reusing these products. Use of anaerobic black water sludge and struvite as soil amendments is recommended based on the low micropollutant content. Aerobic grey water sludge is recommended for disposal, because of the relatively high micropollutant concentrations, exceeding those in sewage sludge...
April 11, 2017: Environmental Research
https://www.readbyqxmd.com/read/28406700/moderate-exercise-based-on-artificial-gravity-preserves-orthostatic-tolerance-and-exercise-capacity-during-short-term-head-down-bed-rest
#4
Xiao-Tao Li, Chang-Bin Yang, Yong-Sheng Zhu, Jing Sun, Fei Shi, Yong-Chun Wang, Yuan Gao, Jiang-Dong Zhao, Xi-Qing Sun
Numerous countermeasures have been proposed to minimize microgravity-induced physical deconditioning, but their benefits are limited. The present study aimed to investigate whether personalized aerobic exercise based on artificial gravity (AG) mitigates multisystem physical deconditioning. Fourteen men were assigned to the control group (n=6) and the countermeasure group (CM, n=8). Subjects in the CM group were exposed to AG (2Gz at foot level) for 30 min twice daily, during which time cycling exercise of 80-95% anaerobic threshold (AT) intensity was undertaken...
April 12, 2017: Physiological Research
https://www.readbyqxmd.com/read/28388274/six-minute-stepper-test-to-set-pulmonary-rehabilitation-intensity-in-patients-with-copd-a-retrospective-study
#5
Tristan Bonnevie, Francis-Edouard Gravier, Marie Leboullenger, Clément Médrinal, Catherine Viacroze, Antoine Cuvelier, Jean-François Muir, Catherine Tardif, David Debeaumont
Pulmonary rehabilitation (PR) improves outcomes in patients with chronic obstructive pulmonary disease (COPD). Optimal assessment includes cardiopulmonary exercise testing (CPET), but consultations are limited. Field tests could be used to individualize PR instead of CPET. The six-minute stepper test (6MST) is easy to set up and its sensitivity and reproducibility have previously been reported in patients with COPD. The aim of this study was to develop a prediction equation to set intensity in patients attending PR, based on the 6MST...
April 7, 2017: COPD
https://www.readbyqxmd.com/read/28382813/oxygen-uptake-and-body-composition-after-aquatic-physical-training-in-women-with-fibromyalgia-a-randomized-controlled-trial
#6
Carolina P Andrade, Antonio R Zamunér, Meire Forti, Thalita F França, Nayara Y Tamburús, Ester Silva
BACKGROUND: Aquatic physical training (APT) has been strongly recommended to improve symptoms in fibromyalgia syndrome (FMS). However, its effects on body composition and whether lean body mass (LBM) directly influences the aerobic functional capacity of this population are still not clear. AIM: To investigate whether APT can help improve body composition and increase the aerobic functional capacity in women with FMS, and whether oxygen consumption (VO2) related to LBM can better quantify the functional capacity of this population...
April 4, 2017: European Journal of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/28382529/a-comparison-of-methods-for-determining-the-ventilatory-threshold-implications-for-surgical-risk-stratification
#7
Baruch Vainshelboim, Shravan Rao, Khin Chan, Ricardo M Lima, Euan A Ashley, Jonathan Myers
PURPOSE: The ventilatory threshold (VT) is an objective physiological marker of the capacity of aerobic endurance that has good prognostic applications in preoperative settings. Nevertheless, determining the VT can be challenging due to physiological and methodological issues, especially in evaluating surgical risk. The purpose of the current study was to compare different methods of determining VT and to highlight the implications for assessing perioperative risk. METHODS: Our study entailed analysis of 445 treadmill cardiopulmonary exercise tests from 140 presurgical candidates with an aortic abdominal aneurysm (≥3...
April 5, 2017: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/28360247/economic-evaluation-of-aerobic-exercise-training-in-older-adults-with-vascular-cognitive-impairment-promote-trial
#8
Jennifer C Davis, Ging-Yuek Robin Hsiung, Stirling Bryan, John R Best, Janice J Eng, Michelle Munkacsy, Winnie Cheung, Bryan Chiu, Claudia Jacova, Philip Lee, Teresa Liu-Ambrose
BACKGROUND/OBJECTIVES: Evidence suggests that aerobic exercise may slow the progression of subcortical ischaemic vascular cognitive impairment (SIVCI) by modifying cardiovascular risk factors. Yet the economic consequences relating to aerobic training (AT) remain unknown. Therefore, our primary objective was to estimate the incremental cost per quality-adjusted life years (QALYs) gained of a thrice weekly AT intervention compared with usual care. DESIGN: Cost-utility analysis alongside a randomised trial...
March 29, 2017: BMJ Open
https://www.readbyqxmd.com/read/28343570/supplemental-intermittent-day-heat-training-and-the-lactate-threshold
#9
Stuart Gollan, Samuel Chalmers, Stephen Alderton, Kevin Norton
Heat acclimation over consecutive days has been shown to improve aerobic-based performance. Recently, it has been suggested that heat training can improve performance in a temperate environment. However, due to the multifactorial training demands of athletes, consecutive-day heat training may not be suitable. The current study aimed to investigate the effect of brief (8×30min) intermittent (every 3-4 days) supplemental heat training on the second lactate threshold point (LT2) in temperate and hot conditions...
April 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/28343364/comparison-between-the-effect-of-6-weeks-of-morning-or-evening-aerobic-exercise-on-appetite-and-anthropometric-indices-a-randomized-controlled-trial
#10
Z Alizadeh, S Younespour, M Rajabian Tabesh, S Haghravan
Several studies have shown that exercise is directly related to creating negative energy balance and changes in appetite. However, few studies have examined the effect of exercise time during the day on these factors. The aim of the present study was to demonstrate the effect of 6 weeks of morning and evening aerobic exercise on appetite and anthropometric indices. A total of 48 overweight females were recruited to this clinical trial. By the time of exercise, they were divided into two groups (morning or evening) and performed 6 weeks of exercise with a target heart rate on the ventilatory threshold...
March 26, 2017: Clinical Obesity
https://www.readbyqxmd.com/read/28341726/rest-and-treatment-rehabilitation-following-sport-related-concussion-a-systematic-review
#11
REVIEW
Kathryn J Schneider, John J Leddy, Kevin M Guskiewicz, Tad Seifert, Michael McCrea, Noah D Silverberg, Nina Feddermann-Demont, Grant L Iverson, Alix Hayden, Michael Makdissi
AIM OR OBJECTIVE: The objective of this systematic review was to evaluate the evidence regarding rest and active treatment/rehabilitation following sport-related concussion (SRC). DESIGN: Systematic review. DATA SOURCES: MEDLINE (OVID), CINAHL (EbscoHost), PsycInfo (OVID), Cochrane Central Register of Controlled Trials (OVID), SPORTDiscus (EbscoHost), EMBASE (OVID) and Proquest DissertationsandTheses Global (Proquest) were searched systematically...
March 24, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28330076/free-cyanide-and-thiocyanate-biodegradation-by-pseudomonas-aeruginosa-stk-03-capable-of-heterotrophic-nitrification-under-alkaline-conditions
#12
Lukhanyo Mekuto, Seteno Karabo Obed Ntwampe, Margaret Kena, Mhlangabezi Tolbert Golela, Olusola Solomon Amodu
An alkali-tolerant bacterium, Pseudomonas aeruginosa STK 03 (accession number KR011154), isolated from an oil spill site, was evaluated for the biodegradation of free cyanide and thiocyanate under alkaline conditions. The organism had a free cyanide degradation efficiency of 80 and 32 % from an initial concentration of 250 and 450 mg CN(-)/L, respectively. Additionally, the organism was able to degrade thiocyanate, achieving a degradation efficiency of 78 and 98 % from non- and free cyanide spiked cultures, respectively...
June 2016: 3 Biotech
https://www.readbyqxmd.com/read/28299717/physical-activity-and-maximal-oxygen-uptake-in-adults-with-prader-willi-syndrome
#13
Itai Gross, Harry J Hirsch, Naama Constantini, Shachar Nice, Yehuda Pollak, Larry Genstil, Talia Eldar-Geva, Varda Gross Tsur
BACKGROUND: Prader-Willi Syndrome (PWS) is the most common genetic syndrome causing life-threatening obesity. Strict adherence to a low-calorie diet and regular physical activity are needed to prevent weight gain. Direct measurement of maximal oxygen uptake (VO2 max), the "gold standard" for assessing aerobic exercise capacity, has not been previously described in PWS. OBJECTIVES: Assess aerobic capacity by direct measurement of VO2 max in adults with PWS, and in age and BMI-matched controls (OC), and compare the results with values obtained by indirect prediction methods...
March 16, 2017: Eating and Weight Disorders: EWD
https://www.readbyqxmd.com/read/28271801/pediatric-aerobic-fitness-and-trainability
#14
Neil Armstrong
Three papers which between them raise controversial issues, apply laboratory measures to sport performance, and expose gaps in knowledge were selected for commentary. The first paper (Sports Med. 2016;46:1451-1460) reviews the literature on peak V̇O2 in relation to body size and recommends that peak V̇O2 in youth is best expressed via allometric scaling of lean body mass. The second paper (Pediatr Exerc Sci. 2016;28:456-465) reports that maturity status has no effect on peak V̇O2, respiratory compensation point, or ventilatory threshold in youth soccer players once data have been allometrically normalized by lower limb muscle volume...
February 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28271312/chronic-effects-of-superimposed-electromyostimulation-during-cycling-on-aerobic-and-anaerobic-capacity
#15
Sebastian Mathes, Niklas Lehnen, Tobias Link, Wilhelm Bloch, Joachim Mester, Patrick Wahl
PURPOSE: To examine if chronic endurance training by means of simultaneously applied, superimposed electromyostimulation (EMS) can be used to improve performance and physiological core parameters compared to the traditional cycling. METHODS: Twenty-one male subjects (VO2peak 55.2 ± 5.1 ml min(- 1) kg(- 1)) were assigned to either a cycling (C) or cycling with superimposed EMS (C + E) group. Before and after the 4-week training period, including 14 sessions of moderate cycling [60 min at 60% peak power output (PPO)], participants performed a 20-min time-trial, a step test to exhaustion, a 30-s isokinetic sprint test, and maximum force- and power-tests...
May 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28264824/cost-effectiveness-analysis-of-an-18-week-exercise-programme-for-patients-with-breast-and-colon-cancer-undergoing-adjuvant-chemotherapy-the-randomised-pact-study
#16
Anne M May, Marcel J C Bosch, Miranda J Velthuis, Elsken van der Wall, Charlotte N Steins Bisschop, Maartje Los, Frans Erdkamp, Haiko J Bloemendal, Marnix A J de Roos, Marlies Verhaar, Daan Ten Bokkel Huinink, Petra H M Peeters, G Ardine de Wit
OBJECTIVE: Meta-analyses show that exercise interventions during cancer treatment reduce cancer-related fatigue. However, little is known about the cost-effectiveness of such interventions. Here we aim to assess the cost-effectiveness of the 18-week physical activity during cancer treatment (PACT) intervention for patients with breast and colon cancer. The PACT trial showed beneficial effects for fatigue and physical fitness. DESIGN: Cost-effectiveness analyses with a 9-month time horizon (18 weeks of intervention and 18 weeks of follow-up) within the randomised controlled multicentre PACT study...
March 6, 2017: BMJ Open
https://www.readbyqxmd.com/read/28245246/oxygen-uptake-kinetics-and-energy-system-s-contribution-around-maximal-lactate-steady-state-swimming-intensity
#17
Jailton Gregório Pelarigo, Leandro Machado, Ricardo Jorge Fernandes, Camila Coelho Greco, João Paulo Vilas-Boas
The purpose of this study was to examine the oxygen uptake ([Formula: see text]) kinetics and the energy systems' contribution at 97.5, 100 and 102.5% of the maximal lactate steady state (MLSS) swimming intensity. Ten elite female swimmers performed three-to-five 30 min submaximal constant swimming bouts at imposed paces for the determination of the swimming velocity (v) at 100%MLSS based on a 7 x 200 m intermittent incremental protocol until voluntary exhaustion to find the v associated at the individual anaerobic threshold...
2017: PloS One
https://www.readbyqxmd.com/read/28243471/a-single-dose-of-beetroot-gel-rich-in-nitrate-does-not-improve-performance-but-lowers-blood-glucose-in-physically-active-individuals
#18
Julia Vasconcellos, Diego Henrique Silvestre, Diego Dos Santos Baião, João Pedro Werneck-de-Castro, Thiago Silveira Alvares, Vânia M Flosi Paschoalin
Background. Beetroot consumption has been proposed to improve exercise performance, since the nitrate content of this food is able to stimulate the synthesis of nitric oxide. Objective. The acute effect of 100 g of a beetroot gel containing ~10 mmol of nitrate was tested on the nitric oxide synthesis, on metabolic and biochemical parameters, and on performance in physically active individuals. Methods. Through a double blind, crossover, placebo-controlled study, 25 healthy runners ingested a single dose of beetroot and placebo gels...
2017: Journal of Nutrition and Metabolism
https://www.readbyqxmd.com/read/28240707/comparison-of-different-methods-for-the-swimming-aerobic-capacity-evaluation
#19
Jailton Gregório Pelarigo, Ricardo Jorge Fernandes, João Ribeiro, Benedito Sérgio Denadai, Camila Coelho Greco, João Paulo Vilas-Boas
This study compared velocity (v) and bioenergetical factors using different methods applied for the swimming aerobic capacity evaluation. Ten elite female swimmers (17.6 ± 1.9 yrs., 1.70 ± 0.05 m and 61.3 ± 5.8 kg) performed an intermittent incremental velocity protocol until voluntary exhaustion to determine the v associated to the individual anaerobic threshold (IAnT), ventilatory threshold (VT), heart rate threshold (HRT), lactate threshold fixed in 3.5 mmol.L (LT3.5) and maximal oxygen uptake (V[Combining Dot Above]O2max)...
February 23, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28223068/parasite-control-and-skeletal-myositis-in-trypanosoma-cruzi-infected-and-exercised-rats
#20
Rômulo D Novaes, Reggiani V Gonçalves, Arlete R Penitente, Marli C Cupertino, Izabel R S C Maldonado, André Talvani, Antônio J Natali
Non-pharmacological strategies have been rarely described in the treatment of infectious diseases. Although exercise training has been recently incorporated in the clinical management of Chagas disease, the rationale basis that supports this indication is poorly understood. Thus, we investigated the effect of an aerobic exercise on the parasitism, inflammation and oxidative tissue damage in a murine model of Trypanosoma cruzi-induced skeletal myositis. Wistar rats were randomized into four groups: trained not infected (TNI) and infected (TI), sedentary not infected (SNI) and infected (SI)...
February 20, 2017: Acta Tropica
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