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https://www.readbyqxmd.com/read/28288012/influence-of-upper-body-exercise-on-the-fatigability-of-human-respiratory-muscles
#1
Nicholas B Tiller, Ian G Campbell, Lee M Romer
PURPOSE: Diaphragm and abdominal muscles are susceptible to contractile fatigue in response to high-intensity, whole-body exercise. This study assessed whether the ventilatory and mechanical loads imposed by high-intensity, upper-body exercise would be sufficient to elicit respiratory muscle fatigue. METHODS: Seven healthy men (mean±SD: age 24±4 y; peak O2 uptake [V[Combining Dot Above]O2 peak] 31.9±5.3 ml/kg/min) performed asynchronous arm-crank exercise to exhaustion at work rates equivalent to 30% (heavy) and 60% (severe) of the difference between gas-exchange threshold and V[Combining Dot Above]O2 peak...
March 10, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28286201/arm-cranking-exercise-training-reduces-plasminogen-activator-inhibitor-1-in-people-with-spinal-cord-injury
#2
Masahiro Horiuchi, Koichi Okita
OBJECTIVE: To investigate the effects of arm-cranking exercise training on plasminogen activator inhibitor 1 (PAI-1) as a risk factor of deep vein thrombosis, along with general physical parameters such as, muscle strength, aerobic capacity, and hemodynamics, in individuals with spinal cord injury (SCI) and control. DESIGN: Longitudinal study. INTERVENTION: Community-based supervised intervention. PARTICIPANTS: Nine individuals with SCI volunteered for this study...
March 9, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28282757/increasing-heat-storage-by-wearing-extra-clothing-during-upper-body-exercise-up-regulates-heat-shock-protein-70-but-does-not-modify-the-cytokine-response
#3
Christof A Leicht, Aris Papanagopoulos, Sam Haghighat, Steve H Faulkner
Plasma heat shock protein 70 (HSP70) concentrations rise during heat stress, which can independently induce cytokine production. Upper body exercise normally results in modest body temperature elevations. The aim of this study was to investigate the impacts of additional clothing on the body temperature, cytokine and HSP70 responses during this exercise modality. Thirteen males performed 45-min constant-load arm cranking at 63% maximum aerobic power (62 ± 7%V̇O2peak) in either a non-permeable whole-body suit (intervention, INT) or shorts and T-shirt (control, CON)...
September 26, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28277406/comparable-neutrophil-responses-for-arm-and-intensity-matched-leg-exercise
#4
Christof A Leicht, Victoria L Goosey-Tolfrey, Nicolette C Bishop
INTRODUCTION: Arm exercise is performed at lower absolute intensities than lower body exercise. This may impact on intensity dependent neutrophil responses and it is unknown whether individuals restricted to arm exercise experience the same changes in the neutrophil response as found for lower body exercise. Therefore, we aimed to investigate the importance of exercise modality and relative exercise intensity on the neutrophil response. METHODS: Twelve moderately trained males performed three 45-min constant load exercise trials following determination of peak oxygen uptake for arm exercise (V[Combining Dot Above]O2peak arms) and cycling (V[Combining Dot Above]O2peak legs): (1) arm cranking exercise at 60%V[Combining Dot Above]O2peak arms; (2) moderate cycling at 60%V[Combining Dot Above]O2peak legs; and (3) easy cycling at 60%V[Combining Dot Above]O2peak arms...
March 8, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28268718/a-new-crank-arm-based-load-cell-with-built-in-conditioning-circuit-and-strain-gages-to-measure-the-components-of-the-force-applied-by-a-cyclist
#5
Andre V Pigatto, Karina O A Moura, Gabriela W Favieiro, Alexandre Balbinot
This report describes the development of a force platform based on instrumented load cells with built-in conditioning circuit and strain gages to measure and acquire the components of the force that is applied to the bike crank arm during pedaling in real conditions, and save them on a SD Card. To accomplish that, a complete new crank arm 3D solid model was developed in the SolidWorks, with dimensions equivalent to a commercial crank set and compatible with a conventional road bike, but with a compartment to support all the electronics necessary to measure 3 components of the force applied to the pedal during pedaling...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226906/a-new-crank-arm-based-load-cell-with-built-in-conditioning-circuit-and-strain-gages-to-measure-the-components-of-the-force-applied-by-a-cyclist
#6
Andre V Pigatto, Karina O A Moura, Gabriela W Favieiro, Alexandre Balbinot, Andre V Pigatto, Karina O A Moura, Gabriela W Favieiro, Alexandre Balbinot, Karina O A Moura, Gabriela W Favieiro, Alexandre Balbinot, Andre V Pigatto
This report describes the development of a force platform based on instrumented load cells with built-in conditioning circuit and strain gages to measure and acquire the components of the force that is applied to the bike crank arm during pedaling in real conditions, and save them on a SD Card. To accomplish that, a complete new crank arm 3D solid model was developed in the SolidWorks, with dimensions equivalent to a commercial crank set and compatible with a conventional road bike, but with a compartment to support all the electronics necessary to measure 3 components of the force applied to the pedal during pedaling...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28183441/similar-metabolic-response-to-lower-versus-upper-body-interval-exercise-or-endurance-exercise
#7
Monique E Francois, Matthew J Graham, Evelyn B Parr, Nancy J Rehrer, Samuel J E Lucas, Stasinos Stavrianeas, James D Cotter
PURPOSE: To compare energy use and substrate partitioning arising from repeated lower- versus upper-body sprints, or endurance exercise, across a 24-h period. METHODS: Twelve untrained males (24±4 y) completed three trials in randomized order: (1) repeated sprints (five 30-s Wingate, 4.5-min recovery) on a cycle ergometer (SITLegs); (2) 50-min continuous cycling at 65% V̇O2max (END); (3) repeated sprints on an arm-crank ergometer (SITArms). Respiratory gas exchange was assessed before and during exercise, and at eight points across 22h of recovery...
March 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28165641/effects-of-nitrate-supplementation-in-trained-and-untrained-muscle-is-modest-with-initial-high-plasma-nitrite-levels
#8
Peter M Christensen, Nanna K Petersen, Signe N Friis, Eddie Weitzberg, Lars Nybo
Nitrate (NO3(-) ) supplementation resulting in higher plasma nitrite (NO2(-) ) is reported to lower resting mean arterial blood pressure (MAP) and oxygen uptake (VO2 ) during submaximal exercise in non-athletic populations, whereas effects in general are absent in endurance trained individuals. To test whether physiological effects of NO3(-) supplementation depend on local muscular training status or cardiovascular fitness, male endurance-trained cyclists (CYC, n=9, VO2 -max: 64±3 ml/min/kg; mean±SD) and recreational active subjects serving as a control group (CON, n=8, 46±3 ml/min/kg), acutely consumed nitrate-rich beetroot-juice ([NO3(-) ] ~9 mmol) (NIT) or placebo (PLA) with assessment of resting MAP and energy expenditure during moderate intensity (~50% VO2 -max) and incremental leg cycling (LEG-ex) and arm cranking exercise (ARM-ex)...
February 6, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28101567/influence-of-arm-crank-ergometry-on-development-of-lymphedema-in-breast-cancer-patients-after-axillary-dissection-a-randomized-controlled-trail
#9
RANDOMIZED CONTROLLED TRIAL
Thorsten Schmidt, Jette Berner, Walter Jonat, Burkhard Weisser, Christioph Röcken, Marion van Mackelenbergh, Christoph Mundhenke
OBJECTIVE: To investigate the safety and efficacy of arm crank ergometry in breast cancer patients after axillary lymph node dissection, with regard to changes in bioelectrical impedance analysis, arm circumference, muscular strength, quality of life and fatigue. DESIGN: Randomized controlled clinical intervention trial. SUBJECTS: Forty-nine patients with breast cancer after axillary lymph node dissection. METHODS: Arm crank ergometer training twice-weekly was compared with usual care over 12 weeks...
January 19, 2017: Journal of Rehabilitation Medicine
https://www.readbyqxmd.com/read/28089898/exercise-guidelines-to-promote-cardiometabolic-health-in-spinal-cord-injured-humans-time-to-raise-the-intensity
#10
Tom E Nightingale, Richard S Metcalfe, Niels Bj Vollaard, James L J Bilzon
Spinal cord injury (SCI) is a life changing event that, as a result of paralysis, negatively influences habitual levels of physical activity and hence cardiometabolic health. Performing regular structured exercise therefore appears extremely important in persons with SCI. However, exercise options are mainly limited to the upper-body, which involves a smaller activated muscle mass compared to the mainly leg-based activities commonly performed by non-disabled individuals. Current exercise guidelines for SCI focus predominantly on relative short durations of moderate-intensity aerobic arm cranking exercise, yet contemporary evidence suggests this is not sufficient to induce meaningful improvements in risk factors for the prevention of cardiometabolic disease in this population...
January 12, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28032253/effect-of-cadence-on-locomotor-respiratory-coupling-during-upper-body-exercise
#11
Nicholas B Tiller, Mike J Price, Ian G Campbell, Lee M Romer
INTRODUCTION: Asynchronous arm-cranking performed at high cadences elicits greater cardiorespiratory responses compared to low cadences. This has been attributed to increased postural demand and locomotor-respiratory coupling (LRC), and yet, this has not been empirically tested. This study aimed to assess the effects of cadence on cardiorespiratory responses and LRC during upper-body exercise. METHODS: Eight recreationally-active men performed arm-cranking exercise at moderate and severe intensities that were separated by 10 min of rest...
February 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28012910/a-single-bout-of-arm-crank-exercise-promotes-positive-emotions-and-post-exercise-hypotension-in-patients-with-symptomatic-peripheral-artery%C3%A2-disease
#12
B R Cavalcante, R M Ritti-Dias, A H G Soares, A H Lima, M A Correia, L D De Matos, F Gobbi, A S Leicht, N Wolosker, G G Cucato
OBJECTIVE/BACKGROUND: The objective was to analyze the acute effects of a single bout of arm cranking exercise on affective and cardiovascular parameters in patients with symptomatic peripheral artery disease (PAD). METHODS: This was a prospective, controlled, crossover study. Eleven men with symptomatic PAD underwent two experimental sessions in a random order: control or arm crank exercise (15 × 2 minutes bouts of arm crank exercise interrupted by 2 minutes rest intervals)...
December 21, 2016: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/27826236/changes-in-corticospinal-and-spinal-excitability-to-the-biceps-brachii-with-a-neutral-vs-pronated-handgrip-position-differ-between-arm-cycling-and-tonic-elbow-flexion
#13
Davis A Forman, Mark Richards, Garrick N Forman, Michael W R Holmes, Kevin E Power
The purpose of this study was to examine the influence of neutral and pronated handgrip positions on corticospinal excitability to the biceps brachii during arm cycling. Corticospinal and spinal excitability were assessed using motor evoked potentials (MEPs) elicited via transcranial magnetic stimulation (TMS) and cervicomedullary-evoked potentials (CMEPs) elicited via transmastoid electrical stimulation (TMES), respectively. Participants were seated upright in front on arm cycle ergometer. Responses were recorded from the biceps brachii at two different crank positions (6 and 12 o'clock positions relative to a clock face) while arm cycling with neutral and pronated handgrip positions...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/27824234/the-effects-of-upper-extremity-aerobic-exercise-on-exercise-capacity-and-other-health-issues-in-patients-with-spinal-cord-injury-a-randomized-controlled-study
#14
Halil Akkurt, Hale Uzumcugil Karapolat, Yesim Kirazli, Timur Kose
BACKGROUND: Immobility and secondary complications, including cardiopulmonary disease, pressure ulcers, and pain, occur in patients with spinal cord injury (SCI). These patients also have difficulty coping with the strain of daily activities. Thus, it is important for SCI patients to engage in aerobic exercise in order to be able to cope adequately with the strain of activities and SCI-related complications. AIM: The aim of this study was to investigate the effects of arm aerobic exercise on the parameters of cardiopulmonary function, quality of life, degree of disability, psychological state, and metabolic syndrome...
November 8, 2016: European Journal of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/27746738/the-physiological-mechanisms-of-performance-enhancement-with-sprint-interval-training-differ-between-the-upper-and-lower-extremities-in-humans
#15
Christoph Zinner, David Morales-Alamo, Niels Ørtenblad, Filip J Larsen, Tomas A Schiffer, Sarah J Willis, Miriam Gelabert-Rebato, Mario Perez-Valera, Robert Boushel, Jose A L Calbet, Hans-Christer Holmberg
To elucidate the mechanisms underlying the differences in adaptation of arm and leg muscles to sprint training, over a period of 11 days 16 untrained men performed six sessions of 4-6 × 30-s all-out sprints (SIT) with the legs and arms, separately, with a 1-h interval of recovery. Limb-specific VO2peak, sprint performance (two 30-s Wingate tests with 4-min recovery), muscle efficiency and time-trial performance (TT, 5-min all-out) were assessed and biopsies from the m. vastus lateralis and m. triceps brachii taken before and after training...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27633940/validity-and-reliability-of-skill-related-fitness-tests-for-wheelchair-using-youth-with-spina-bifida
#16
Manon A Bloemen, Tim Takken, Frank J Backx, Marleen Vos, Cas L Kruitwagen, Janke F de Groot
OBJECTIVES: To determine content validity of the Muscle Power Sprint Test (MPST), and construct validity and reliability of the MPST, 10×5 Meter Sprint Test (10×5MST), slalom test, and One Stroke Push Test (1SPT) in wheelchair-using youth with spina bifida (SB). DESIGN: Clinimetric study. SETTING: Rehabilitation centers, SB outpatient services, and private practices. PARTICIPANTS: A convenience sample of children and adolescents (N=53; 32 boys, 21 girls; age range, 5-19y) with SB who use a manual wheelchair...
September 12, 2016: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/27316760/prediction-of-closed-chain-human-arm-dynamics-in-a-crank-rotation-task
#17
Saeed Davoudabadi Farahani, Mikhail Svinin, Michael Skipper Andersen, Mark de Zee, John Rasmussen
This paper deals with the analysis of human arm movement in a crank-rotation task that is an example of environmentally constrained movements. Opening a door, rotating a steering wheel, and pushing a carriage are other typical examples of movements where the physical constraints, imposed on the hand position/orientation, influence the joint angles of the shoulder and the elbow. To predict kinematic and kinetic patterns for human arm movement in crank-rotation tasks, we use an optimization-based technique. The method enables dynamic prediction of closed-chain movements and force exertion using inverse dynamics musculoskeletal simulation...
June 6, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/27278276/the-influence-of-a-home-based-exercise-intervention-on-human-health-indices-in-individuals-with-chronic-spinal-cord-injury-homex-sci-study-protocol-for-a-randomised-controlled-trial
#18
Tom E Nightingale, Jean-Philippe Walhin, James E Turner, Dylan Thompson, James L J Bilzon
BACKGROUND: Spinal cord injury (SCI) creates a complex pathology that can lead to an increase in sedentary behaviours and deleterious changes in body composition. Consequently, individuals with SCI are at increased risk of developing cardiovascular disease and type-2 diabetes mellitus. While the role of physical activity on the reduction of chronic disease risk is well documented in non-disabled individuals the evidence is less conclusive for persons with SCI. The aim of this methodological paper is to outline the design of a study that will assess the role of a home-based exercise intervention on biomarkers of metabolic and cardiovascular health in persons with SCI: the HOMEX-SCI study...
2016: Trials
https://www.readbyqxmd.com/read/27239728/influence-of-saddle-setback-on-pedalling-technique-effectiveness-in-cycling
#19
Mathieu Menard, Mathieu Domalain, Arnaud Decatoire, Patrick Lacouture
Besides its regulation by Union Cycliste Internationale, the evidence relating saddle setback to pedalling performance remains inconclusive. This study investigates the influence of saddle setback on pedalling effectiveness through two indexes: an index of pedalling force effectiveness and an index of pedalling work effectiveness. Eleven cyclists were assessed six saddle setback conditions while pedalling at a steady power output of 200 W and cadence of 90 rpm. A force sensor was integrated within the seat post to compute the centre of pressure on the saddle...
November 2016: Sports Biomechanics
https://www.readbyqxmd.com/read/27144169/arm-crank-and-wheelchair-ergometry-produce-similar-peak-oxygen-uptake-but-different-work-economy-values-in-individuals-with-spinal-cord-injury
#20
Tom Tørhaug, Berit Brurok, Jan Hoff, Jan Helgerud, Gunnar Leivseth
Objective. To study whether values for peak oxygen uptake (VO2peak) and work economy (WE) at a standardized workload are different when tested by arm crank ergometry (ACE) and wheelchair ergometry (WCE). Methods. Twelve paraplegic men with spinal cord injury (SCI) in stable neurological condition participated in this cross-sectional repeated-measures study. We determined VO2peak and peak power output (POpeak) values during ACE and WCE in a work-matched protocol. Work economy was tested at a standardized workload of 30 Watts (W) for both ACE and WCE...
2016: BioMed Research International
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