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Bj?rgen S - - 2009
The aim of the present study was to investigate whether hyperoxic aerobic high intensity one-legged interval cycling improves peak oxygen uptake (V O (2peak)) compared to normoxic training in patients with severe chronic obstructive pulmonary disease, and to evaluate the acute effect of hyperoxia during one- and two-legged peak exercise ...
Simmelink Elisabeth K - - 2009
The measurement of physical fitness of lower limb amputees is difficult, as the commonly used ergometer tests have limitations. A combined arm-leg (Cruiser) ergometer might be valuable. The aim of this study was to establish the repeatability and validity of the combined arm-leg (Cruiser) ergometer. Thirty healthy volunteers carried out ...
Zoeller Robert F - - 2009
Participation in regular aerobic exercise has been shown to increase arterial size and that exercise-induced vascular remodeling may be regional rather than systemic. However, these issues have been minimally investigated concerning resistance training. PURPOSES: To determine whether 1) resistance training of the nondominant arm elicits an increase in diameter of ...
Polito Marcos D - - 2009
The effects of muscle mass and number of sets on postexercise hypotension (PEH) following resistance exercises are barely known. The aim of the study was to compare systolic blood pressure (SBP), diastolic blood pressure, and mean arterial blood pressure (MAP) after biceps curl and leg extension with different number of ...
Wilbur J C - - 2010
Exercise may produce micronuclei (presumably gas-filled bubbles) in tissue, which could serve as nucleation sites for bubbles during subsequent decompression stress. These micronuclei have never been directly detected in humans. Dual-frequency ultrasound (DFU) is a resonance-based, ultrasound technique capable of detecting and sizing small stationary bubbles. We surveyed for bubbles ...
Vianna Lauro C - - 2010
This study was conducted to determine whether the heart rate increase at the onset of passive dynamic exercise is related to the amount of skeletal muscle mass engaged in movement. Fifteen healthy male subjects, 18-30 years old, performed, from the 4th to the 8th second of a 12-s apnea, four ...
Bordin Newton Antonio - - 2009
Exercising is one of the three cornerstones in the treatment of lymphedema together with contention mechanisms and lymphatic drainage. The aim of the current study was to evaluate a new method of mechanic lymphatic drainage. Volumetric reductions were evaluated after passive exercises in 25 patients with arm lymphedema resulting from ...
Neville V - - 2009
Standing arm-cranking ('grinding') is predominantly an upper-body exercise, however, the contribution of the legs to this activity is unknown. The purpose of the study was to examine the influence of normal lower-limb movement on physiological strain during arm-cranking. Eight elite professional America's Cup grinders performed two exercise trials, on an ...
Pedersen Lia Mendes - - 2010
Blood flow distribution after ascending-to-descending aortic bypass in complex aortic arch obstruction is poorly described. To study blood flow by magnetic resonance (MR) imaging at rest and during exercise in patients with aortic arch obstruction and a bypass tube and in healthy controls. Seven patients (median 18 years (range: 14-54 ...
Fujita Yukio - - 2009
The effects of active recovery using previously active and inactive muscle groups on power output and respiratory responses were examined. Ten male volunteers underwent two exhaustive 40-s bouts of leg cycling (1st Ex and 2nd Ex), separated by a 20-min recovery period. The recovery conditions were leg (Leg-Active) or arm ...
Mikkelsen U R - - 2009
Despite the widespread consumption of nonsteroidal anti-inflammatory drugs (NSAIDs), the influence of these drugs on muscle satellite cells is not fully understood. The aim of the present study was to investigate the effect of a local NSAID infusion on satellite cells after unaccustomed eccentric exercise in vivo in human skeletal ...
Medbø Jon Ingulf - - 2009
During cycling blood flow is redistributed from physically inactive tissues to working leg muscles. It is unknown how long this situation persists after very intense exercise or whether it differs between intense exhausting and non-exhausting exercise. It is also not known to what extent the redistribution differs between different types ...
Sato Kohei - - 2009
We examined the role of central command in static exercise-induced increase in middle cerebral artery mean blood flow velocity (V(MCA)). Eleven young female subjects performed static elbow flexion for 2 min at 30% maximal voluntary contraction without (control exercise; CONT) and with vibrations to the biceps brachii tendon (EX+VIB) in ...
Akerstrom Thorbjorn C A - - 2009
Glucose ingestion during exercise attenuates the release of the myokine interleukin-6 (IL-6) from working skeletal muscle, which results in a diminished increase in plasma IL-6. Interleukin-6 receptor alpha (IL-6Ralpha) expression in skeletal muscle is induced by acute exercise, mediated in part by an increased IL-6 concentration in the bloodstream. We ...
Borg E - - 2010
The features of perceived symptoms causing discontinuation of strenuous exercise have been scarcely studied. The aim was to characterize the two main symptoms causing the discontinuation of heavy work in healthy persons as well as describe the growth of symptoms during exercise. Breathlessness (b) and leg fatigue (l) were assessed ...
deJong Adam T - - 2009
Marathon runners (MR) are among the most aerobically fit athletes in the world. Although aerobic capacity (VO(2)max) during arm exercise generally varies between 64% and 80% of leg VO(2)max (mean 70%) in healthy men, few data are available regarding the comparative arm fitness of MR. To clarify the relationship between ...
Thijssen Dick H J - - 2009
INTRODUCTION/PURPOSE: During exercise, redistribution of blood takes place to enhance blood flow to exercising muscles. To examine the role of sympathetic control in blood redistribution, we assessed blood flow in inactive regions (leg-splanchnic area) during arm-crank exercise in controls and in subjects with spinal cord injury (SCI) who lack central ...
Greene David A - - 2009
We conducted a 28-week school-based exercise trial of single-leg drop-landing exercise with 42 girls (Tanner stage 1, 6-10 years old) randomly assigned to control (C), low-drop (LD), or high-drop (HD) exercise groups. The LD and HD groups performed single-leg drop-landings (three sessions/week and 50 landings/session) from 14 and 28 cm, ...
Larsen S - - 2009
AIM/HYPOTHESIS: The aim of the study was to investigate mitochondrial function, fibre type distribution and substrate oxidation in arm and leg muscle during exercise in patients with type 2 diabetes and in obese and lean controls. METHODS: Indirect calorimetry was used to calculate fat and carbohydrate oxidation during both progressive ...
Dawson Ellen A - - 2009
The purpose of this study was to investigate whether measures derived from the SphygmoCor device and its associated transfer function are influenced by exercise-induced alterations in vascular tone. Measurements were taken from either the exercised or the contralateral nonexercised limb during repeated and identical incremental hand-grip protocols. Eight male subjects ...
Bjørgen Siri - - 2009
The purpose of this study was to investigate whether individual leg cycling could produce higher whole body peak oxygen uptake (VO(2peak)) than two legs cycling during aerobic high intensity interval training in chronic obstructive pulmonary disease (COPD) patients. Nineteen patients trained in 24 supervised cycling sessions either by one leg ...
Osada Takuya - - 2009
BACKGROUND AND AIM: Limb femoral arterial blood flow (LBF) is known to increase linearly with increasing workload under steady-state conditions, suggesting a close link between LBF and metabolic activity. We, however, hypothesized that sudden physiological and spontaneous changes in exercise rhythm, and consequently workload temporarily alter blood flow to the ...
Hotta Norio - - 2009
The purpose of this study was to investigate the effect of an increase in intramuscular pressure on ventilatory response at the onset of exercise. Seven subjects participated in this study. We measured ventilatory responses to a 20-s single-arm extension-flexion exercise and passive movement. Each subject performed two kinds of exercise ...
Housman Sarah J - - 2009
BACKGROUND/OBJECTIVE: The authors previously developed a passive instrumented arm orthosis (Therapy Wilmington Robotic Exoskeleton [T-WREX]) that enables individuals with hemiparesis to exercise the arm by playing computer games in a gravity-supported environment. The purpose of this study was to compare semiautonomous training with T-WREX and conventional semiautonomous exercises that used ...
Medb?? Jon Ingulf - - 2009
During cycling blood flow is redistributed from physically inactive tissues to working leg muscles. It is unknown how long this situation persists after very intense exercise or whether it differs between intense exhausting and non-exhausting exercise. It is also not known to what extent the redistribution differs between different types ...
Bergqvist David - - 2009
BACKGROUND: StepIt is a device for active movement of the foot that simulates normal walking with calf muscle contractions. METHODS: In 40 healthy volunteers with predominantly office work and sitting conditions, StepIt was used regularly for 1 day, and the volume of the calf, approximated to a truncated cone, was ...
Sosnoff Jacob - - 2009
We conducted a small pilot study that examined the effect of a 4-week period of unloaded leg cycling on spasticity in individuals with multiple sclerosis (MS). The sample included 22 individuals with MS who were assigned using a quasi-experimental method into either exercise (n = 12) or control (n = ...
Wray D Walter - - 2009
alpha(1)-Adrenergic vasoconstriction during dynamic leg exercise is diminished in younger individuals, although the extent of this exercise-induced "sympatholysis" in the elderly remains uncertain. Thus, in nine young (25 +/- 1 yr) and six older (72 +/- 2 yr) healthy volunteers, we evaluated changes in leg blood flow (ultrasound Doppler) during ...
Magnus Charlene R A - - 2008
Bilateral deficit is defined as the difference in the summed force between contracting muscles alone and contracting contralateral homologous muscles in combination. The purpose of the study was to investigate how postural stability influences bilateral deficit by comparing an exercise requiring more postural stability (the leg press) with an exercise ...
Bean Jonathan F - - 2008
OBJECTIVE: To test which rehabilitative impairments are associated with higher mobility performance among community-dwelling, mobility-limited older adults. DESIGN: Cross-sectional analysis of baseline data from participants within a randomized controlled trial. SETTING: Outpatient rehabilitation research center. PARTICIPANTS: Community-dwelling older adults (N=138; mean age, 75.4 y) with mobility limitations as defined by ...
Thijssen Dick H J - - 2009
During lower limb exercise, blood flow through the resting upper limbs exhibits a change characterized by increased anterograde flow during systole, but also large increases in retrograde diastolic flow. One explanation for the retrograde flow is that increased sympathetic nervous system (SNS) tone and concomitant increased peripheral resistance generate a ...
Hotta Norio - - 2009
We previously reported that ventilatory response at the onset of light leg exercise was augmented in delayed onset muscle soreness (DOMS) after eccentric exercise (ECC) utilizing the leg. In this study, we examined whether the same result would appear in light exercise in which an arm with DOMS was utilized. ...
Shecterle Linda - - 2008
Restless legs syndrome is a neurological disorder characterized by unpleasant sensations and pain, predominantly in the lower extremities while at rest, accompanied by an uncontrollable urge for movement for relief. We report on two affected male individuals, a father and son, ages 71 and 47, from a family in which ...
Kooijman M - - 2009
AIM: The prompt increase in peripheral vascular resistance, mediated by sympathetic alpha-adrenergic stimulation, is believed to be the key event in blood pressure control during postural stress. However, despite the absence of central sympathetic control of the leg vasculature, postural leg vasoconstriction is preserved in spinal cord-injured individuals (SCI). This ...
Konstantaki Maria - - 2008
CONTEXT: Forward propulsion in freestyle swimming is predominantly achieved through arm action. Few studies have assessed the effects of arm training on arm power and swimming performance, yet there have not been any investigations on the effects of arms-only swimming training on swimming performance and physiological responses to arm exercise. ...
van Duijnhoven Noortje T L - - 2008
This study was performed to assess the effect of resistive vibration exercise during bed rest deconditioning on venous vascular dimension and function, as measured with ultrasound in the popliteal vein. Sixteen men were assigned to bed rest (BR-Ctrl) or bed rest with resistive vibration exercise (BR-RVE). Before and at 25 ...
Akima Hiroshi - - 2008
The purpose of this study was to investigate the functional characteristics of the quadriceps femoris (QF) muscle group after the effect of presurgery disuse, surgery, and postsurgery disuse using surface electromyography and muscle functional magnetic resonance imaging (mfMRI). A total of 20 individuals (11 men and nine women) who underwent ...
Davis Glen M - - 2008
Functional electrical stimulation (FES)-induced leg exercise offers the potential for individuals with lower-limb paralysis to otherwise gain some benefits conferred by leg exercise. Although its original intent is to reactivate the leg muscles to produce functional upright mobility, as a rehabilitation therapy, FES-evoked exercise increases the whole-body metabolism of individuals ...
Macias Brandon R - - 2008
INTRODUCTION: Resistive exercise helps prevent muscle atrophy in microgravity, but better exercise equipment is needed. Therefore, the purpose of this study was to determine if a pneumatic, gravity-independent leg-press device (LPD) provides sufficient force to leg musculature. We hypothesized that intramuscular pressure (IMP), a quantitative index of muscle force, is ...
Schormair Barbara - - 2008
We identified association of restless legs syndrome (RLS) with PTPRD at 9p23-24 in 2,458 affected individuals and 4,749 controls from Germany, Austria, Czechia and Canada. Two independent SNPs in the 5' UTR of splice variants expressed predominantly in the central nervous system showed highly significant P values (rs4626664, P(nominal/lambda corrected) ...
Codognotto Marta - - 2008
OBJECTIVE: Tetrapolar whole-body (hand-foot) bioelectrical impedance (Z-body) is used in body composition analysis assuming homogeneous soft tissue hydration. Limbs and trunk contribute to Z-body by 90% and 10%, respectively. We determined the effect on Z-body of an edema localized in one leg. METHODS: Resistance (R) and reactance (Xc) components of ...
Yoshizawa Mutsuko - - 2008
We studied the effect of exercise intensity and duration on blood flow to the non-exercising leg during one-legged dynamic knee extension. Femoral arterial blood flow (FBF) to the non-exercising leg, blood pressure (BP), and heart rate (HR) were monitored during one-legged dynamic knee extension exercise at 15, 30, and 45% ...
Wray D Walter - - 2008
Exercise hyperemia is attenuated in the elderly, which may be attributed to local vasoregulatory pathways within the skeletal muscle vasculature. Therefore, we sought to determine whether healthy aging is associated with changes in angiotensin II (Ang II) receptor sensitivity through measurements of leg blood flow in resting and exercising skeletal ...
Ichinose Masashi - - 2008
We tested the hypotheses that arterial baroreflex (ABR) control over muscle sympathetic nerve activity (MSNA) in humans does not remain constant throughout a bout of leg cycling ranging in intensity from very mild to exhausting. ABR control over MSNA (burst incidence, burst strength and total MSNA) was evaluated by analysing ...
Demarie S - - 2008
The aim of this study was to investigate the contribution of the auxiliary muscles, utilized to sustain the subject's position on the ergometer, to the oxygen uptake slow component phenomenon. Three tests were performed at the same severe relative intensity on a rowing ergometer: a standard rowing exercise test, a ...
Mortensen Stefan P - - 2008
Perfusion to exercising skeletal muscle is regulated to match O(2) delivery to the O(2) demand, but this regulation might be compromised during or approaching maximal whole-body exercise as muscle blood flow for a given work rate is blunted. Whether muscle perfusion is restricted when there is an extreme metabolic stimulus ...
Parker Beth A - - 2008
This study examined the relation between femoral artery hyperemic responses to leg exercise and microvascular oxygen extraction in nine young [(mean +/- S.E.M) Y: 25 +/- 1 years] and 13 older (O: 67 +/- 1 years) healthy women. Femoral artery blood flow (FBF; Doppler ultrasound), mean arterial pressure (MAP), and ...
González-Alonso José - - 2008
The muscle pump and muscle vasodilatory mechanism are thought to play important roles in increasing and maintaining muscle perfusion and cardiac output ((.)Q) during exercise, but their actual contributions remain uncertain. To evaluate the role of the skeletal muscle pump and vasodilatation on cardiovascular function during exercise, we determined leg ...
Liebensteiner M C - - 2008
PURPOSE: The role of frontal plane tibiofemoral alignment in subjects with patellofemoral pain syndrome (PFPS) is controversial and rarely discussed in the literature. As well, little research has been done on the effects of the hamstrings muscles on PFPS. The aim of the current study was to determine whether, in ...
Olivier Nicolas - - 2008
OBJECTIVE: To compare the cardiorespiratory responses, blood lactate concentration and perceived exertion between 1-leg cycling and arm cranking. DESIGN: Comparison of exercise modalities. SETTING: Hospital. PARTICIPANTS: Fourteen men who had undergone knee surgery were evaluated during rehabilitation. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Each patient performed 2 maximal graded tests: ...
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