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exercise, fitness, performance

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https://www.readbyqxmd.com/read/28330458/the-effects-of-an-extensive-exercise-programme-on-the-progression-of-mild-cognitive-impairment-mci-study-protocol-for-a-randomised-controlled-trial
#1
Kate E Devenney, Brian Lawlor, Marcel G M Olde Rikkert, Stefan Schneider
BACKGROUND: Exercise interventions to prevent dementia and delay cognitive decline have gained considerable attention in recent years. Human and animal studies have demonstrated that regular physical activity targets brain function by increasing cognitive reserve. There is also evidence of structural changes caused by exercise in preventing or delaying the genesis of neurodegeneration. Although initial studies indicate enhanced cognitive performance in patients with mild cognitive impairment (MCI) following an exercise intervention, little is known about the effect of an extensive, controlled and regular exercise regimen on the neuropathology of patients with MCI...
March 22, 2017: BMC Geriatrics
https://www.readbyqxmd.com/read/28321588/use-of-bioimpedianciometer-as-predictor-of-mountain-marathon-performance
#2
Vicente Javier Clemente-Suarez, Pantelis Theodoros Nikolaidis
This study aimed to examine the relation among body composition, training experience and race time during a mountain marathon. Body composition and training pre-race experience analyses were conducted previous to a mountain marathon in 52 male athletes. A significant correlation between race time and mountain marathon with chronological age, body fat mass, percentage of body fat (BF), level of abdominal obesity, sport experience and daily training volume was revealed. In addition, BF and athlete's chronological age were negatively associated with race performance...
May 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28319786/lower-cardiorespiratory-fitness-is-associated-with-more-time-spent-sedentary-in-first-episode-psychosis-a-pilot-study
#3
Davy Vancampfort, Marc De Hert, Inez Myin-Germeys, Ruud van Winkel, Joseph Firth, Tine Van Damme, Michel Probst
Patients with a psychotic disorder show lower cardiorespiratory fitness and higher mortality rates compared to healthy individuals. The aim of this cross-sectional study was to explore whether in patients with first-episode psychosis a low cardiorespiratory fitness is associated with decreased physical activity and increased sedentary levels. Twenty-nine outpatients (21 men; 22.8±5.1 years) performed a maximal exercise test to assess their maximum oxygen uptake (VO2max), wore a Senswear armband for five consecutive days and were assessed with the Positive and Negative Syndrome Scale...
March 14, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28306686/utility-of-walk-tests-in-evaluating-functional-status-among-participants-in-an-outpatient-cardiac-rehabilitation-program
#4
Kristie M Harris, Derek R Anderson, Jacob D Landers, Charles F Emery
PURPOSE: Although walk tests are frequently used in cardiac rehabilitation (CR), no prior study has evaluated the capacity of these measures to predict peak oxygen uptake during exercise testing (V·o2peak). This study evaluated the interrelationship of objective measures of exercise performance (walk and exercise testing) among patients entering CR as well as a novel measure of functional status assessment for use in CR. METHODS: Forty-nine patients (33 males) referred to an outpatient CR program were evaluated with objective measures of ambulatory functional status (peak oxygen uptake [V·o2peak], 6-minute walk test [6MWT], and 60-ft walk test [60ftWT])...
March 15, 2017: Journal of Cardiopulmonary Rehabilitation and Prevention
https://www.readbyqxmd.com/read/28306685/effects-of-a-6-week-aquatic-treadmill-exercise-program-on-cardiorespiratory-fitness-and-walking-endurance-in-subacute-stroke-patients-a-pilot-trial
#5
Eun Young Han, Sang Hee Im
OBJECTIVE: To assess the feasibility and safety of a 6-week course of water walking performed using a motorized aquatic treadmill in individuals with subacute stroke for cardiorespiratory fitness, walking endurance, and activities of daily living. METHODS: Twenty subacute stroke patents were randomly assigned to aquatic treadmill exercise (ATE) or land-based exercise (LBE). The ATE group (n = 10) performed water-based aerobic exercise on a motorized aquatic treadmill, and the LBE group (n = 10) performed land-based aerobic exercise on a cycle ergometer...
March 15, 2017: Journal of Cardiopulmonary Rehabilitation and Prevention
https://www.readbyqxmd.com/read/28303944/relationships-between-strength-and-endurance-parameters-and-air-depletion-rates-in-professional-firefighters
#6
Stephanie Windisch, Wolfgang Seiberl, Ansgar Schwirtz, Daniel Hahn
The aim of this study was to quantify the physical demands of a simulated firefighting circuit and to establish the relationship between job performance and endurance and strength fitness measurements. On four separate days 41 professional firefighters (39 ± 9 yr, 179.6 ± 2.3 cm, 84.4 ± 9.2 kg, BMI 26.1 ± 2.8 kg/m(2)) performed treadmill testing, fitness testing (strength, balance and flexibility) and a simulated firefighting exercise. The firefighting exercise included ladder climbing (20 m), treadmill walking (200 m), pulling a wire rope hoist (15 times) and crawling an orientation section (50 m)...
March 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28303562/association-between-actn3-r577x-polymorphism-and-trunk-flexibility-in-2-different-cohorts
#7
Naoki Kikuchi, Hirofumi Zempo, Noriyuki Fuku, Haruka Murakami, Mikako Sakamaki-Sunaga, Takanobu Okamoto, Koichi Nakazato, Motohiko Miyachi
α-Actinin-3 (ACTN3) R577X polymorphism is associated with muscular strength and power. This study was performed to investigate the association between ACTN3 R577X polymorphisms and flexibility as another component of fitness in 2 cohorts. Cohort 1 consisted of 208 men and 568 women (ages 23-88), while Cohort 2 consisted of 529 men and 728 women (ages 23-87). All participants were recruited from the Tokyo metropolitan area and underwent a battery of tests to assess their grip strength and sit-and-reach flexibility...
March 16, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28303248/fitness-effects-of-10-month-frequent-low-volume-ball-game-training-or-interval-running-for-8-10-year-old-school-children
#8
Malte Nejst Larsen, Claus Malta Nielsen, Christina Ørntoft, Morten Bredsgaard Randers, Eva Wulff Helge, Mads Madsen, Vibeke Manniche, Lone Hansen, Peter Riis Hansen, Jens Bangsbo, Peter Krustrup
We investigated the exercise intensity and fitness effects of frequent school-based low-volume high-intensity training for 10 months in 8-10-year-old children. 239 Danish 3rd-grade school children from four schools were cluster-randomised into a control group (CON, n = 116) or two training groups performing either 5 × 12 min/wk small-sided football plus other ball games (SSG, n = 62) or interval running (IR, n = 61). Whole-body DXA scans, flamingo balance, standing long-jump, 20 m sprint, and Yo-Yo IR1 children's tests (YYIR1C) were performed before and after the intervention...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28302456/association-between-modified-shuttle-walk-test-and-cardiorespiratory-fitness-in-overweight-obese-adults-with-primary-hypertension-exerdiet-hta-study
#9
Borja Jurio-Iriarte, Ilargi Gorostegi-Anduaga, G Rodrigo Aispuru, Javier Pérez-Asenjo, Peter H Brubaker, Sara Maldonado-Martín
The aims of the study were to evaluate the relationship between Modified Shuttle Walk Test (MSWT) with peak oxygen uptake (V˙O2peak) in overweight/obese people with primary hypertension (HTN) and to develop an equation for the MSWT to predict V˙O2peak. Participants (N = 256, 53.9 ± 8.1 years old) with HTN and overweight/obesity performed a cardiorespiratory exercise test to peak exertion on an upright bicycle ergometer using an incremental ramp protocol and the 15-level MSWT. The formula of Singh et al was used as a template to predict V˙O2peak, and a new equation was generated from the measured V˙O2peak-MSWT relationship in this investigation...
February 7, 2017: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/28301436/the-effects-of-recovery-duration-during-high-intensity-interval-exercise-on-time-spent-at-high-rates-of-oxygen-consumption-oxygen-kinetics-and-blood-lactate
#10
Ilias Smilios, Aristides Myrkos, Andreas Zafeiridis, Argyris Toubekis, Apostolos Spassis, Savas P Tokmakidis
The recovery duration and the work to recovery ratio are important aspects to consider when designing a high-intensity aerobic interval exercise (HIIE). This study examined the effects of recovery duration on total exercise time performed above 80, 90 and 95% of maximum oxygen consumption (VO2max) and heart rate (HRmax) during a single-bout HIIE. We also evaluated the effects on VO2 and HR kinetics, blood lactate concentration and rating of perceived exertion (RPE). Eleven moderately trained males (22.1±1 yrs...
March 13, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28293467/relationships-between-cardiorespiratory-fitness-hippocampal-volume-and-episodic-memory-in-a-population-at-risk-for-alzheimer-s-disease
#11
Ryan J Dougherty, Stephanie A Schultz, Elizabeth A Boots, Laura D Ellingson, Jacob D Meyer, Stephanie Van Riper, Aaron J Stegner, Dorothy F Edwards, Jennifer M Oh, Jean Einerson, Claudia E Korcarz, Rebecca L Koscik, Maritza N Dowling, Catherine L Gallagher, Cynthia M Carlsson, Howard A Rowley, Barbara B Bendlin, Sanjay Asthana, Bruce P Hermann, Mark A Sager, James H Stein, Sterling C Johnson, Ozioma C Okonkwo, Dane B Cook
INTRODUCTION: Cardiorespiratory fitness (CRF) has been shown to be related to brain health in older adults. In individuals at risk for developing Alzheimer's disease (AD), CRF may be a modifiable risk factor that could attenuate anticipated declines in brain volume and episodic memory. The objective of this study was to determine the association between CRF and both hippocampal volume and episodic memory in a cohort of cognitively healthy older adults with familial and/or genetic risk for Alzheimer's disease (AD)...
March 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28291825/development-and-evaluation-of-a-soft-wearable-weight-support-device-for-reducing-muscle-fatigue-on-shoulder
#12
Daegeun Park, Kyu-Jin Cho
Compensating the weight of human limbs is important in reducing muscle fatigue experienced by manual laborers. In this study, a compact and lightweight soft wearable weight support device was developed and evaluated. The device supports gravitational force on the shoulder at any arm posture, although there are some limitations in its assistive performance. The device actuator consists of a cam-rod structure, a tendon-driven mechanism, and a rubber band. The desired assistive torque is translated to the shoulder joint along a tendon routing structure...
2017: PloS One
https://www.readbyqxmd.com/read/28291022/effects-of-descending-stair-walking-on-health-and-fitness-of-elderly-obese-women
#13
Trevor C Chen, Chung-Chan Hsieh, Kuo-Wei Tseng, Chih-Chiao Ho, Kazunori Nosaka
PURPOSE: Eccentric exercise training produces positive fitness and health outcomes, but whether this is also the case for descending stair walking (DSW) is unknown. This study investigated the hypothesis that DSW would improve insulin sensitivity, lipid profiles and physical fitness better than ascending stair walking (ASW). METHODS: Elderly (≥60 y) obese women were placed to either DSW or ASW group (n=15/group). An elevator was used to eliminate ascending stairs for DSW, and descending stairs for ASW...
March 13, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28290972/malignant-hyperthermia-susceptibility-and-fitness-for-duty
#14
Michael A Lee, Erin B McGlinch, Maria C McGlinch, John F Capacchione
INTRODUCTION: Malignant hyperthermia (MH) is an inherited hypermetabolic condition characterized by uncontrolled calcium release from the sarcoplasmic reticulum of skeletal muscle, usually from exposure to inhaled general anesthetics and/or the depolarizing neuromuscular blocking agent succinylcholine. Multiple case reports now reveal that crises may be precipitated by environmental factors such as exercise or high ambient temperatures. Common signs of an MH crisis include life-threatening hyperthermia, metabolic acidosis, muscle rigidity, and tachycardia...
March 2017: Military Medicine
https://www.readbyqxmd.com/read/28287051/body-size-and-physical-exercise-and-the-risk-of-multiple-sclerosis
#15
Marianna Cortese, Trond Riise, Kjetil Bjørnevik, Kjell-Morten Myhr
BACKGROUND: Whether large body size increases multiple sclerosis (MS) risk in men is not well understood. Concurrently, physical exercise could be an independent protective factor. OBJECTIVE: To prospectively investigate the association between body mass index (BMI) and aerobic fitness, indicators of body size and exercise, and MS risk in men. METHODS: We performed a population-based nested case-control study within the historical cohort of all Norwegian men, born in 1950-1975, undergoing mandatory conscription at the age of 19 years...
March 1, 2017: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/28286137/impact-of-cardiorespiratory-fitness-on-all-cause-and-disease-specific-mortality-advances-since-2009
#16
REVIEW
Matthew P Harber, Leonard A Kaminsky, Ross Arena, Steven N Blair, Barry A Franklin, Jonathan Myers, Robert Ross
Cardiorespiratory fitness (CRF) has been one of the most widely examined physiological variables, particularly as it relates to functional capacity and human performance. Over the past three decades, CRF has emerged as a strong, independent predictor of all-cause and disease-specific mortality. The evidence supporting the prognostic use of CRF is so powerful that the American Heart Association recently advocated for the routine assessment of CRF as a clinical vital sign. Interestingly, the continuity of evidence of the inverse relationship between CRF and mortality over the past decade exists despite a wide variation of methods used to assess CRF in these studies, ranging from the gold-standard method of directly measured maximal oxygen uptake (VO2max) during cardiopulmonary exercise testing to estimation from exercise tests and non-exercise prediction equations...
March 9, 2017: Progress in Cardiovascular Diseases
https://www.readbyqxmd.com/read/28278454/accurate-wearable-heart-rate-monitoring-during-physical-exercises-using-ppg
#17
Andriy Temko
OBJECTIVE: The challenging task of heart rate (HR) estimation from the photoplethysmographic (PPG) signal, during intensive physical exercises is tackled in this paper. METHODS: The study presents a detailed analysis of a novel algorithm (WFPV) that exploits a Wiener filter to attenuate the motion artifacts, a phase vocoder to refine the HR estimate and user-adaptive postprocessing to track the subject physiology. Additionally, an offline version of the HR estimation algorithm that uses Viterbi decoding is designed for scenarios that do not require online HR monitoring (WFPV+VD)...
March 1, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28277695/acute-aerobic-exercise-hastens-emotional-recovery-from-a-subsequent-stressor
#18
Emily E Bernstein, Richard J McNally
OBJECTIVE: Despite findings that regular exercise is broadly associated with emotional well-being, more basic research is needed to deepen our understanding of the exercise and emotion connection. This paper examines how acute aerobic exercise in particular influences subjective emotional recovery from a subsequent stressor. Potential mediators and moderators, including level of physical fitness, attentional control, and perseverative negative thinking were explored. METHOD: All of the participants (n = 95) completed 3 laboratory visits, each including 1 of 3 activities (i...
March 9, 2017: Health Psychology: Official Journal of the Division of Health Psychology, American Psychological Association
https://www.readbyqxmd.com/read/28271802/growth-maturation-and-exercise-during-youth-2016
#19
Jaak Jürimäe
For The Year that Was-2016, I have selected three papers in the area of growth, maturation, and exercise during youth. The year of 2016 was a successful year and it was not an easy task to highlight the most significant publications in this specific area of pediatric exercise science. The first paper has been chosen because it provides, for the first time, the growth and maturational status of elite junior tennis players belonging to the top eight players in the National rankings in various ages and compares against population norms...
February 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28270724/exercise-for-people-with-cancer-a-clinical-practice-guideline
#20
R Segal, C Zwaal, E Green, J R Tomasone, A Loblaw, T Petrella
BACKGROUND: Development of this guideline was undertaken by the Exercise for People with Cancer Guideline Development Group, a group organized by Cancer Care Ontario's Program in Evidence-Based Care (pebc). The purpose of the guideline was to provide guidance for clinicians with respect to exercise for patients living with cancer, focusing on the benefits of specific types of exercise, recommendations about screening requirements for new referrals, and safety concerns. METHODS: Consistent with the pebc's standardized approach, a systematic search was conducted for existing guidelines, and systematic literature searches were performed in medline and embase for both systematic reviews and primary literature...
February 2017: Current Oncology
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