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Harsh H Buddhadev, Daniel L Crisafulli, David N Suprak, Jun G San Juan
Cycling is commonly prescribed for physical rehabilitation of individuals with knee osteoarthritis (OA). Despite the known therapeutic benefits, no research has examined interlimb symmetry of power output during cycling in these individuals. We investigated the effects of external workload and cadence on interlimb symmetry of crank power output in individuals with knee OA versus healthy controls. Twelve older participants with knee OA and 12 healthy sex- and age-matched controls were recruited. Participants performed 2-minute bouts of stationary cycling at four workload-cadence conditions (75 W-60 rpm, 75 W-90 rpm, 100 W-60 rpm, and 100 W-90 rpm)...
March 15, 2018: Journal of Applied Biomechanics
Kerri A Morgan, Kelly L Taylor, Susan M Tucker, W Todd Cade, Joseph W Klaesner
OBJECTIVE: Determine the validity and reliability of an exercise testing protocol to evaluate cardiorespiratory measures in manual wheelchair users (MWUs) with spinal cord injury (SCI) using a roller-based (RS) wheelchair system. DESIGN: Repeated measures within-subject design. SETTING: Community-based research laboratory. PARTICIPANTS: Ten adults with SCI requiring the use of a manual wheelchair. INTERVENTIONS: Not applicable...
March 8, 2018: Journal of Spinal Cord Medicine
Mathew Hill, Christopher Talbot, Michael Puddiford, Michael Price
PURPOSE: This study compared cardiorespiratory and perceptual responses to exercise using self-regulated and imposed power outputs distributed between the arms and legs. METHODS: Ten males (age 21.7 ± 3.4 years) initially undertook incremental arm-crank ergometry (ACE) and cycle ergometry (CYC) tests to volitional exhaustion to determine peak power output (Wpeak ). Two subsequent tests involved 20-min combined arm-leg ergometry (ALE) trials, using imposed and self-regulated protocols, both of which aimed to elicit an exercising heart rate of 160 beats min-1 ...
March 6, 2018: European Journal of Applied Physiology
Ceren Yarar-Fisher, Keith Fl Polston, Mualla Eraslan, Kathryn Y Henley, Gizem I Kinikli, C Scott Bickel, Samuel T Windham, Amie B McLain, Robert A Oster, Marcas M Bamman
This study compares the effects of an 8-week iso-caloric high protein (HP) diet versus a combination exercise (Comb-Ex) regimen on paralytic vastus lateralis (VL) and non-paralytic deltoid muscle in individuals with long-standing spinal cord injury (SCI). Fiber type distribution, cross-sectional area (CSA), levels of translation initiation signaling proteins (Erk-1/2, Akt, p70S6K1, 4EBP1, RPS6, and FAK), and lean thigh mass were analyzed at baseline and after the 8-week interventions. A total of 11 participants (C5-T12 levels, 21...
March 1, 2018: Journal of Applied Physiology
Marisa Maia Leonardi-Figueiredo, Mariana Angélica de Souza, Elisangela Aparecida da Silva Lizzi, Luciano Fonseca Lemos de Oliveira, Julio Cesar Crescencio, Pedro Vellosa Schwartzmann, Lourenço Gallo, Ana Claudia Mattiello-Sverzut
PURPOSE: We analyzed the evolution and pattern of heart rate (HR) during the 12-minute wheelchair propulsion field test (WPFT) and compared the peak HR (HRpeak ) from the WPFT to the HRpeak obtained in the progressive cardiopulmonary exercise test on arm cranking ergometer (ACT). We aimed to determine if the field test detects the HRpeak consistently and could be used in clinical practice. METHODS: Eleven wheelchair-using children and adolescents with myelomeningocele (aged 8-15 y) performed a maximal ACT and a 12-minute WPFT...
February 27, 2018: Pediatric Exercise Science
Scott Michael, Ollie Jay, Kenneth S Graham, Glen M Davis
OBJECTIVES: This study investigated indirect measures of post-exercise parasympathetic reactivation (using heart-rate-variability, HRV) and sympathetic withdrawal (using systolic-time-intervals, STI) following upper- and lower-body exercise. DESIGN: Randomized, counter-balanced, crossover. METHODS: 13 males (age 26.4±4.7years) performed maximal arm-cranking (MAX-ARM) and leg-cycling (MAX-LEG). Subsequently, participants undertook separate 8-min bouts of submaximal HR-matched exercise of each mode (ARM and LEG)...
February 12, 2018: Journal of Science and Medicine in Sport
Manuel J Escalona, Rachel Brosseau, Martin Vermette, Alain Steve Comtois, Cyril Duclos, Mylène Aubertin-Leheudre, Dany H Gagnon
BACKGROUND: Many wheelchair users adopt a sedentary lifestyle, which results in progressive physical deconditioning with increased risk of musculoskeletal, cardiovascular and endocrine/metabolic morbidity and mortality. Engaging in a walking program with an overground robotic exoskeleton may be an effective strategy for mitigating these potential negative health consequences and optimizing fitness in this population. However, additional research is warranted to inform the development of adapted physical activity programs incorporating this technology...
January 22, 2018: Annals of Physical and Rehabilitation Medicine
Chris J McManus, Jay Collison, Chris E Cooper
The purpose of the study was to compare muscle oxygenation as measured by two portable, wireless near-infrared spectroscopy (NIRS) devices under resting and dynamic conditions. A recently developed low-cost NIRS device (MOXY) was compared against an established PortaMon system that makes use of the spatially resolved spectroscopy algorithm. The influence of increasing external pressure on tissue oxygen saturation index (TSI) indicated that both devices are stable between 2 and 20 mmHg. However, above this pressure, MOXY reports declining TSI values...
January 2018: Journal of Biomedical Optics
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
James J Bresnahan, Gary J Farkas, Jody L Clasey, James W Yates, David R Gater
OBJECTIVE: Evaluate the effect of aerobic exercise using arm crank ergometry (ACE) in high motor complete (ISNCSCI A/B) spinal cord injury (SCI) as primarily related to cardiovascular disease (CVD) risk factors and functional mobility and secondarily to body composition and metabolic profiles. DESIGN: Longitudinal interventional study at an academic medical center. METHODS: Ten previously untrained participants (M8/F2, Age 36.7 y ± 10.1, BMI 24...
January 15, 2018: Journal of Spinal Cord Medicine
Rik Berkelmans, Billy Woods
The functional electrical stimulation (FES) bicycle race was an event at the Cybathlon, held in Zurich October 2016. BerkelBike BV (The Netherlands) in collaboration with Imperial College London entered a spinal cord injury pilot who had tetraplegia to compete in this event. The BerkelBike Pro is a commercially available FES capable recumbent which is normally driven by the arm- and leg power. The arm cranking part was disabled. Now the tricycle must be driven using the pilots own lower limb muscles through stimulation in accordance with race rules...
December 5, 2017: European Journal of Translational Myology
Michael B La Monica, David H Fukuda, Tristan M Starling-Smith, Ran Wang, Jay R Hoffman, Jeffrey R Stout
PURPOSE: To evaluate the effects of moderate normobaric hypoxia on the parameters of the work-time relationship in the upper body. METHODS: Twenty-one recreationally active men completed a graded exercise test in both normobaric hypoxia (H) and normoxia (N) to exhaustion on an arm ergometer to determine V̇O2peak and peak power output (PPO). Each participant completed four constant work-rate (CWR) arm-cranking tests at 90-120% PPO in both environmental conditions...
December 13, 2017: Respiratory Physiology & Neurobiology
Alexandros Mitropoulos, Anil Gumber, Helen Crank, Markos Klonizakis
The maximal oxygen uptake (V̇O2peak) test is an approved pre-operative examination tool, in a clinical setting: Both V̇O2peak and anaerobic threshold indicate a patient's physiological tolerance for major surgery and post-operative mortality, with cycle ergometry being routinely used for V̇O2peak tests in clinical settings, in many European countries. Nevertheless, the opportunities to assess populations with restricted mobility of the lower limbs are limited, as alternative methods (such as an arm-crank test protocol) to assess V̇O2peak are yet to be established...
December 2017: Journal of Sports Science & Medicine
Marcelle Paula-Ribeiro, Daniel G Martinez, Jorge R P Lima, Mateus C Laterza
AIM: This study aimed to investigate the clinic and 24-h postexercise hypotension (PEH) after a moderate-intensity arm crank exercise session in individuals with traumatic lower-limb amputation. PARTICIPANTS AND METHODS: Nine men (46±17 years) with unilateral traumatic lower-limb amputation participated in two experimental sessions conducted randomly: an aerobic exercise (EXE: arm crank ergometer, 30 min) or a control session (CON: participants remained seated on the cycle ergometer, 30 min)...
April 2018: Blood Pressure Monitoring
M Klonizakis, G A Tew, A Gumber, H Crank, B King, G Middleton, J A Michaels
BACKGROUND: Almost 70% of all leg ulcers have a venous component. Venous leg ulcers (VLU's) are typically painful and heal slowly, resulting in an impaired quality of life (QoL), social isolation and reduced work productivity. Compression therapy offers high healing rates, however, improvements aren't usually sustained. Exercise is a low-cost, low-risk, and effective strategy for improving physical and mental health. However, little is currently known about the feasibility and efficacy of supervised exercise training used in combination with compression therapy in this patient group...
October 27, 2017: British Journal of Dermatology
Karin Lundgren-Kownacki, Natividad Martínez, Bo Johansson, Agnes Psikuta, Simon Annaheim, Kalev Kuklane
Two mathematical models of human thermal regulation include the rational Predicted Heat Strain (PHS) and the thermophysiological model by Fiala. The approaches of the models are different, however, they both aim at providing predictions of the thermophysiological responses to thermal environments of an average person. The aim of this study was to compare and analyze predictions of the two models against experimental data. The analysis also includes a gender comparison. The experimental data comprised of ten participants (5 males, 5 females, average anthropometric values were used as input) conducting an intermittent protocol of rotating tasks (cycling, stacking, stepping and arm crank) of moderate metabolic activities (134-291W/m(2)) with breaks in-between in a controlled environmental condition (34°C, 60% RH)...
December 2017: Journal of Thermal Biology
Ana Sousa, Fabio Borrani, Ferran A Rodríguez, Grégoire P Millet
Oxygen uptake ([Formula: see text]) kinetics has been reported to be influenced by the activity mode. However, only few studies have compared [Formula: see text]O2 kinetics between activities in the same subjects in which they were equally trained. Therefore, this study compared the [Formula: see text]O2 kinetics response to swimming, arm cranking, and cycling within the same group of subjects within the heavy exercise intensity domain. Ten trained male triathletes (age 23.2 ± 4.5 years; height 180.8 ± 8...
2017: Frontiers in Physiology
Thomas Fuglsang, Johnny Padulo, Massimo Spoladore, Michele Dalla Piazza, Luca P Ardigò
There is a lack of human-powered watercrafts for people with lower-body disabilities. The purpose of this study was therefore to develop a watercraft for disabled people and investigate the metabolic cost and efficiency when pedaling. The watercraft was designed by combining parts of a waterbike and a handbike. Nine able-bodied subjects pedaled the watercraft at different speeds on a lake to provide steady-state metabolic measurements, and a deceleration test was performed to measure the hydrodynamic resistance of the watercraft...
2017: Frontiers in Physiology
Kuan-Yi Wu, Yin-Yu Su, Ying-Lung Yu, Kuei-You Lin, Chao-Chieh Lan
Powered exoskeletons can facilitate rehabilitation of patients with upper limb disabilities. Designs using rotary motors usually result in bulky exoskeletons to reduce the problem of moving inertia. This paper presents a new linearly actuated elbow exoskeleton that consists of a slider crank mechanism and a linear motor. The linear motor is placed beside the upper arm and closer to shoulder joint. Thus better inertia properties can be achieved while lightweight and compactness are maintained. A passive joint is introduced to compensate for the exoskeleton-elbow misalignment and intersubject size variation...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
Sigitas Kamandulis, Vidas Bruzas, Pranas Mockus, Alvydas Stasiulis, Audrius Snieckus, Tomas Venckunas
High-intensity interval training improves endurance and performance, but it is unclear whether sprint-type upper-body interval training is similarly effective. This study explored the effects of 4-week sport-specific sprint interval training on punch characteristics and endurance capacity in boxers. Experienced male amateur boxers (n = 18) participated in this 4-week training study, and were divided into an experimental group (EG) and a control group (CG) (n = 9 per group). Both groups completed standard low-intensity training...
August 9, 2017: Journal of Strength and Conditioning Research
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