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https://www.readbyqxmd.com/read/29350279/evaluation-of-the-convergent-validity-of-an-estimated-cardiorespiratory-fitness-algorithm
#1
Paul D Loprinzi, Meghan K Edwards, Ovuokerie Addoh, John P Bentley
PURPOSE: Examine the convergent validity of a cardiorespiratory fitness (CRF) algorithm when compared to treadmill-assessed CRF. METHODS: Data from the 1999-2004 NHANES were used (N = 3259 adults 20-49 years). Cardiorespiratory fitness was estimated from an algorithm. Participants completed a submaximal treadmill-based protocol. We (1) evaluated the pairwise association (and ICC) between estimated and measured cardiorespiratory fitness, (2) employed a paired samples t test to examine potential mean differences between estimated and measured cardiorespiratory fitness, (3) constructed a Bland-Altman plot and 95% limits of agreement (LoA) to explore systematic differences and random error between estimated and measured cardiorespiratory fitness, and (4) examined the association (via linear regression) of estimated and measured cardiorespiratory fitness with chronic disease prevalence and C-reactive protein (CRP)...
January 19, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29345541/running-mechanics-and-metabolic-responses-with-water-bottles-and-bottle-belt-holders
#2
Heather K Vincent, Laura A Zdziarski, Kyle Fallgatter, Giorgio Negron, Cong Chen, Trevor Leavitt, MaryBeth Horodyski, Joseph G Wasser, Kevin R Vincent
PURPOSE: This study determined whether differential kinematics, kinetics, rates of energy use and cardiopulmonary responses occurred during running with water bottles and bottle belt holders compared to running only. METHODS: Trained runners (N=42; 27.2±6.4 yr) ran on an instrumented treadmill for four conditions in a randomized order: 1) control run (CON); 2) hand-held full water bottle (FULL, 16.9 fluid oz; 454 g); 3) hand-held half-full water bottle (HALF, 8...
January 18, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29341891/long-term-treadmill-exercise-improves-memory-impairment-through-restoration-of-decreased-synaptic-adhesion-molecule-1-2-3-induced-by-transient-cerebral-ischemia-in-the-aged-gerbil-hippocampus
#3
Ji Hyeon Ahn, Joon Ha Park, Jinseu Park, Myoung Cheol Shin, Jun Hwi Cho, In Hye Kim, Jeong-Hwi Cho, Tae-Kyeong Lee, Jae-Chul Lee, Bich Na Shin, Young-Myeong Kim, Choong Hyun Lee, In Koo Hwang, Il Jun Kang, Bai Hui Chen, Bing Chun Yan, Young Joo Lee, Moo-Ho Won, Soo Young Choi
Exercise improves cognitive impairments induced by transient cerebral ischemia and modulates synaptic adhesion molecules. In this study, we investigated effects of long-term treadmill exercise on cognitive impairments and its relation to changes of synaptic cell adhesion molecule (SynCAM) 1/2/3 in the hippocampus after 5 min of transient cerebral ischemia in aged gerbils. Animals were assigned to sedentary and exercised groups, given treadmill exercise for 4 consecutive weeks from 5 days after transient ischemia and evaluated cognitive function through passive avoidance test and Morris water maze test...
January 13, 2018: Experimental Gerontology
https://www.readbyqxmd.com/read/29340527/cardiac-protein-expression-patterns-are-associated-with-distinct-inborn-exercise-capacity-in-non-selectively-bred-rats
#4
L P Ribeiro, L C Freitas-Lima, G B Naumann, S S Meyrelles, W Lunz, S F Pires, H M Andrade, J B T Carnielli, S G Figueiredo
In the present study, we successfully demonstrated for the first time the existence of cardiac proteomic differences between non-selectively bred rats with distinct intrinsic exercise capacities. A proteomic approach based on two-dimensional gel electrophoresis coupled to mass spectrometry was used to study the left ventricle (LV) tissue proteome of rats with distinct intrinsic exercise capacity. Low running performance (LRP) and high running performance (HRP) rats were categorized by a treadmill exercise test, according to distance run to exhaustion...
January 11, 2018: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/29340005/comparison-of-aerobic-performance-testing-protocols-in-elite-male-wheelchair-basketball-players
#5
Bartosz Molik, Andrzej Kosmol, Natalia Morgulec-Adamowicz, Judit Lencse-Mucha, Anna Mróz, Karol Gryko, Jolanta Marszałek
In wheelchair sports, aerobic performance is commonly assessed with the use of an arm crank ergometer (ACE), a wheelchair ergometer (WCE) or a wheelchair treadmill (WCT). There are different protocols to identify peak oxygen uptake in wheelchair sports; however, only a few protocols have been applied to evaluate these conditions in wheelchair basketball players. The purpose of this study was to compare physiological responses during maximal exercise testing with the use of ACE and WCT in wheelchair basketball players...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29339981/using-bilateral-functional-and-anthropometric-tests-to-define-symmetry-in-cross-country-skiers
#6
Glenn Björklund, Marie Alricsson, Ulla Svantesson
The aim of this study was to evaluate the symmetry of anthropometry and muscle function in cross-country skiers and their association to vertical jumping power. Twenty cross-country skiers were recruited (21.7 ± 3.8 yrs, 180.6 ± 7.6 cm, 73.2 ± 7.6 kg). Anthropometric data was obtained using an iDXA scan. VO2max was determined using the diagonal stride technique on a ski treadmill. Bilateral functional tests for the upper and lower body were the handgrip and standing heel-rise tests. Vertical jump height and power were assessed with a counter movement jump...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29339114/a-systematic-review-and-meta-analysis-of-cardiorespiratory-fitness-among-indigenous-populations-in-north-america-and-circumpolar-inuit-populations
#7
REVIEW
Lila M A Hedayat, Claire C Murchison, Heather J A Foulds
Indigenous populations experience health disparities including increased obesity, diabetes and cardiovascular disease rates. Cardiorespiratory fitness is beneficial for maintaining positive health outcomes. The objective of this systematic review is to evaluate cardiorespiratory fitness among Indigenous populations including comparisons across genders, Indigenous identities, age groups, decades, socio-demographic variables and in comparison to non-Indigenous groups. Included articles reported various cardiorespiratory fitness measures using maximal treadmill or cycle ergometer tests, 20 m shuttle run, 1 mile run/walk test and 6 min walk test...
January 12, 2018: Preventive Medicine
https://www.readbyqxmd.com/read/29337831/the-acute-effects-of-a-caffeine-containing-supplement-on-anaerobic-power-and-subjective-measurements-of-fatigue-in-recreationally-active-males
#8
Chelsea J Hahn, Andrew R Jagim, Clayton L Camic, Matthew J Andre
Studies show mixed results for the effects of caffeine on performance, warranting further investigation. The purpose of this study was to examine the acute effects of a caffeine-containing supplement on anaerobic power and subjective measurements of fatigue during resisted sprinting on males. Fourteen recreationally-active males [N=14; (mean±SD), age: 21.0±0.7 yrs., height: 178.5±5.1 cm, weight: 77.3±9.6 kg, percent body fat: 12.6±4.8%] participated in a double-blind, placebo controlled, within-subjects crossover design study...
January 4, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29336648/rhythmic-arm-swing-integrated-into-treadmill-training-in-patients-with-chronic-stroke-a-single-subject-experimental-study
#9
Tae-Woo Kang, Duck-Won Oh, Ji-Hyun Lee, Heon-Seok Cynn
Normal walking includes coordinated and controlled movement of the legs and arms. However, patients following stroke often present with inappropriate motor control which limits coordinated movement patterns of the affected limbs. This study aimed to compare the effects of rhythmic arm swing and arm fixation during treadmill walking in patients with poststroke hemiparesis. We used an alternating study design with multiple baselines across subjects. Three patients with chronic stroke participated in this study...
January 16, 2018: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/29336209/effects-of-treadmill-training-combined-with-serotonergic-interventions-on-spasticity-after-contusive-spinal-cord-injury
#10
Youngjae Ryu, Toru Ogata, Motoshi Nagao, Yasuhiro Sawada, Ryohei Nishimura, Naoki Fujita
Spasticity usually emerges during the course of recovery from spinal cord injury (SCI). While medications and physical rehabilitation are prescribed to alleviate spastic symptoms, the insufficiency of their effects remains an important problem to be addressed. Given the challenges associated with increasing the dose of medication, we supposed that a combination therapy with medication and physical rehabilitation can be effective. Therefore, we examined the effects of treadmill training (TMT) along with serotonergic medication using a spastic rat model after contusive injury...
January 16, 2018: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29334869/the-influence-of-water-depth-on-kinematic-and-spatiotemporal-gait-parameters-during-aquatic-treadmill-walking
#11
Taeyou Jung, Yumi Kim, Hyosok Lim, Konstantinos Vrongistinos
The purpose of this study was to investigate kinematic and spatiotemporal variables of aquatic treadmill walking at three different water depths. A total of 15 healthy individuals completed three two-minute walking trials at three different water depths. The aquatic treadmill walking was conducted at waist-depth, chest-depth and neck-depth, while a customised 3-D underwater motion analysis system captured their walking. Each participant's self-selected walking speed at the waist level was used as a reference speed, which was applied to the remaining two test conditions...
January 16, 2018: Sports Biomechanics
https://www.readbyqxmd.com/read/29334615/hemodynamic-and-metabolic-responses-to-self-paced-and-ramp-graded-exercise-testing-protocols
#12
Nicholas M Beltz, Fabiano Amorim, Ann L Gibson, Jeffrey M Janot, Len Kravitz, Christine M Mermier, Nathan Cole, Terence A Moriarty, Tony P Nunez, Sam Trigg, Lance Dalleck
PURPOSE: Recent examinations have shown lower maximal oxygen uptake (VO2max) during traditional ramp (RAMP) compared to self-paced (SPV) graded exercise testing (GXT) attributed to differences in cardiac ouput. The current study examined the differences in hemodyamic and metabolic responses between RAMP and SPV during treadmill exercise. METHODS: Sixteen recreationally trained men (23.7±3.0 yrs) completed two separate treadmill GXT protocols. SPV consisted of five 2-min stages (10 min total) of increasing speed clamped by the Borg RPE6-20 scale...
January 15, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29334614/perceptions-of-exercise-screening-among-older-adults
#13
Liza Stathokostas, Andrea F M Petrella, Wendy Blunt, Robert J Petrella
BACKGROUND: Pre-physical activity screening is important for older adults' participating in physical activity. Unfortunately, many older adults face barriers to exercise participation and thus, may not complete proper physical activity screening. The purpose of this project was to conduct a thematic analysis of perceptions and experiences of community-dwelling older adults regarding pre-physical activity screening (i.e., Get Active Questionnaire (GAQ) and a standardized exercise stress test)...
January 15, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29331720/temporal-spatial-gait-parameter-models-of-very-slow-walking
#14
Andrew J J Smith, Edward D Lemaire
This study assessed the relationship between walking speed and common temporal-spatial stride-parameters to determine if a change in gait strategy occurs at extremely slow walking speeds. Stride-parameter models that represent slow walking can act as a reference for lower extremity exoskeleton and powered orthosis controls since these devices typically operate at walking speeds less than 0.4 m/s. Full-body motion capture data were collected from 30 health adults while walking on a self-paced treadmill, within a CAREN-Extended virtual reality environment...
January 6, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29326902/low-intensity-training-provokes-adaptive-extracellular-matrix-turnover-of-a-muscular-dystrophy-model
#15
Thaís P Gaiad, Murilo X Oliveira, Adalfredo R Lobo, Lívia R Libório, Priscilla A F Pinto, Danielle C Fernandes, Ana Paula Santos, Carlos Eduardo Ambrósio, Alex Sander D Machado
Recommendations of therapeutic exercise in Duchenne muscular dystrophy are still controversial. The hypothesis that a low-intensity training (LIT) protocol leads to muscle adaptations on mdx mice model was tested. Dystrophic male mice with 8 weeks old were separated in exercised (mdxE, n= 8) and sedentary (mdxC, n= 8) groups. Wild-type mice were used as control (WT, n= 8) group. Exercised group underwent a LIT protocol (9 m/min, 30 min, 3 days/wk, 60 days) on a horizontal treadmill. At day 60 all animals were analyzed regarding parameters of markers of muscle lesion and extracellular matrix turnover of muscle tissue by collagens fibers on tibial anterior muscle...
December 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/29326893/treadmill-exercise-ameliorates-social-isolation-induced-depression-through-neuronal-generation-in-rat-pups
#16
Jung-Wan Cho, Sun-Young Jung, Sang-Won Lee, Sam-Jun Lee, Tae-Beom Seo, Young-Pyo Kim, Dae-Young Kim
Social isolation is known to induce emotional and behavioral changes in animals and humans. The effect of treadmill exercise on depression was investigated using social isolated rat pups. The rat pups in the social isolation groups were housed individually. The rat pups in the exercise groups were forced to run on treadmill for 30 min once a day from postnatal day 21 to postnatal day 34. In order to evaluate depression state of rat pups, forced swimming test was performed. Newly generated cells in the hippocampal dentate gyrus were determined by 5-bromo-2'-deoxyuridine (BrdU) immunohistochemistry...
December 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/29325901/dynamic-structure-of-lower-limb-joint-angles-during-walking-post-stroke
#17
Kelley Kempski, Louis N Awad, Thomas S Buchanan, Jill S Higginson, Brian A Knarr
BACKGROUND: Variability in joint kinematics is necessary for adaptability and response to everyday perturbations; however, intrinsic neuromotor changes secondary to stroke often cause abnormal movement patterns. How these abnormal movement patterns relate to joint kinematic variability and its influence on post-stroke walking impairments is not well understood. OBJECTIVE: The purpose of this study was to evaluate the movement variability at the individual joint level in the paretic and non-paretic limbs of individuals post-stroke...
December 15, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29324580/the-relationship-between-skating-economy-and-performance-during-a-repeated-shift-test-in-elite-and-sub-elite-ice-hockey-players
#18
Nicholas R Lamoureux, Grant R Tomkinson, Benjamin J Peterson, John S Fitzgerald
The purpose of this study was to determine the importance of skating economy to fatigue during repeated high-intensity efforts of a simulated ice hockey shift. Forty-five collegiate and Junior A male ice hockey players (aged 18-24 years) performed a continuous graded exercise test using a skate treadmill. Breath-by-breath data for oxygen consumption (V[Combining Dot Above]O2) and respiratory exchange ratio were collected and used to derive energy expenditure (EE) averaged over the final 10 seconds of each stage...
January 5, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29322318/total-knee-arthroplasty-with-unexplained-pain-new-insights-from-kinematics
#19
Célia Planckaert, Gabriel Larose, Pierre Ranger, Marc Lacelle, Alexandre Fuentes, Nicola Hagemeister
INTRODUCTION: Up to 20% of total knee arthroplasty patients remain unsatisfied post-surgery, and a large proportion of them report anterior knee pain. This study aims to verify whether patients who experience anterior knee pain after total knee arthroplasty (TKA) will exhibit kinematic characteristics similar to those associated with patellofemoral syndrome, including in the frontal and transverse planes. MATERIALS AND METHODS: Using four different assessment methods [radiological, patient-reported outcome, musculoskeletal assessment with functional performance testing, and a 3D kinematic assessment during gait], the clinical and 3D knee kinematic profiles of three groups were compared: a painful and an asymptomatic TKA group and a healthy control group...
January 10, 2018: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29321559/the-role-of-parafacial-neurons-in-the-control-of-breathing-during-exercise
#20
Alla Korsak, Shahriar Sheikhbahaei, Asif Machhada, Alexander V Gourine, Robert T R Huckstepp
Neuronal cell groups residing within the retrotrapezoid nucleus (RTN) and C1 area of the rostral ventrolateral medulla oblongata contribute to the maintenance of resting respiratory activity and arterial blood pressure, and play an important role in the development of cardiorespiratory responses to metabolic challenges (such as hypercapnia and hypoxia). In rats, acute silencing of neurons within the parafacial region which includes the RTN and the rostral aspect of the C1 circuit (pFRTN/C1), transduced to express HM4D (Gi-coupled) receptors, was found to dramatically reduce exercise capacity (by 60%), determined by an intensity controlled treadmill running test...
January 10, 2018: Scientific Reports
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