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Shanyuanye Guan, Hans A Gray, Anthony G Schache, Julian Feller, Richard de Steiger, Marcus G Pandy
No data are available to describe six-degree-of-freedom (6-DOF) knee-joint kinematics for one complete cycle of overground walking subsequent to total knee arthroplasty (TKA). The aims of this study were firstly, to measure 6-DOF knee-joint kinematics and condylar motion for overground walking following TKA; and secondly, to determine whether such data differed between overground and treadmill gait when participants walked at the same speed during both tasks. A unique mobile biplane X-ray imaging system enabled accurate measurement of 6-DOF TKA knee kinematics during overground walking by simultaneously tracking and imaging the joint...
October 22, 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
Andreas Zietzer, Eva Elina Buschmann, Doreen Janke, Lulu Li, Michèle Brix, Heike Meyborg, Philipp Stawowy, Constantin Jungk, Ivo Buschmann, Philipp Hillmeister
AIM: Physical activity is a potent way to impede vascular aging. However, patients who suffer from peripheral artery disease (PAD) are often unable to exercise adequately. For those patients, we have developed individual shear rate therapy (ISRT), which is an adaptation of external counterpulsation and enhances endovascular fluid shear stress to increase collateral growth (arteriogenesis). To evaluate the effects of physical exercise and ISRT on the telomere biology of peripheral blood mononuclear cells (PBMCs), we conducted two clinical trials...
October 22, 2016: Acta Physiologica
Marty D Spranger, Jasdeep Kaur, Javier A Sala-Mercado, Abhinav C Krishnan, Rania Abu-Hamdah, Alberto Alvarez, Tiago M Machado, Robert A Augustyniak, Donal S O'Leary
Increases in myocardial oxygen consumption during exercise mainly occur via increases in coronary blood flow (CBF) as cardiac oxygen extraction is high even at rest. However, sympathetic coronary constrictor tone can limit increases in CBF. Increased sympathetic nerve activity (SNA) during exercise is, in part, a function of muscle metaboreflex activation (MMA). As SNA is heightened even at rest in subjects with hypertension (HTN), we tested whether HTN causes exaggerated coronary vasoconstriction during mild treadmill exercise with MMA (elicited by reducing hindlimb blood flow by ~60%) thereby limiting increases in CBF and ventricular performance...
October 21, 2016: American Journal of Physiology. Heart and Circulatory Physiology
Matthijs T W Veltmeijer, Dineke Veeneman, Coen C C W Bongers, Mihai G Netea, Jos W van der Meer, Thijs M H Eijsvogels, Maria T E Hopman
PURPOSE: Exercise increases core body temperature (TC) due to metabolic heat production. However, the exercise-induced release of inflammatory cytokines including interleukin-6 may also contribute to the rise in TC by increasing the hypothalamic temperature setpoint. We aimed to investigate whether the exercise-induced increase in TC is partly caused by an altered hypothalamic temperature setpoint. METHODS: 15 healthy, active male subjects aged 36±14 years were recruited...
September 26, 2016: International Journal of Sports Physiology and Performance
Nicholas J Hanson, Janet Buckworth
Time perception during exercise may be affected by chosen intensity, and may also affect enjoyment of exercise and subsequent long-term adherence. However, little is known about how individuals perceive the passage of time during exercise, or if factors such as sex are influential. The purpose of this study was to determine if there are sex related differences in perception of time during a bout of exercise in experienced runners. Twenty-two recreational runners (11 men, 11 women) participated in a bout of treadmill running where they were allowed to select their intensity...
2016: International Journal of Exercise Science
F A K Mazari, J A Khan, N Samuel, G Smith, D Carradice, P C McCollum, I C Chetter
BACKGROUND: The aim was to compare the long-term outcomes of percutaneous transluminal angioplasty (PTA), a supervised exercise programme (SEP) and combined treatment (PTA + SEP) in patients with intermittent claudication owing to femoropopliteal disease. METHODS: Patients recruited to an RCT comparing these treatments were invited for long-term follow-up from 2010 to 2011. Indicators of limb ischaemia were recorded (ankle : brachial pressure index (ABPI) and treadmill walking distances)...
October 20, 2016: British Journal of Surgery
Nina Lefeber, Eva Swinnen, Eric Kerckhofs
PURPOSE: The integration of sufficient cardiovascular stress into robot-assisted gait (RAG) training could combine the benefits of both RAG and aerobic training. The aim was to summarize literature data on the immediate effects of RAG compared to walking without robot-assistance on metabolic-, cardiorespiratory- and fatigue-related parameters. METHODS: PubMed and Web of Science were searched for eligible articles till February 2016. Means, SDs and significance values were extracted...
October 20, 2016: Disability and Rehabilitation. Assistive Technology
Akira Ikumi, Shigeki Kubota, Yukiyo Shimizu, Hideki Kadone, Aiki Marushima, Tomoyuki Ueno, Hiroaki Kawamoto, Yasushi Hada, Akira Matsumura, Yoshiyuki Sankai, Masashi Yamazaki
CONTEXT: Recently, locomotor training with robotic assistance has been found effective in treating spinal cord injury (SCI). Our case report examined locomotor training using the robotic suit hybrid assistive limb (HAL) in a patient with complete C4 quadriplegia due to chronic SCI. This is the first report examining HAL in complete C4 quadriplegia. FINDINGS: The patient was a 19-year-old man who dislocated C3/4 during judo 4 years previously. Following the injury, he underwent C3/4 posterior spinal fusion but remained paralyzed despite rehabilitation...
October 20, 2016: Journal of Spinal Cord Medicine
Daniel Tarsy
No abstract text is available yet for this article.
October 19, 2016: Movement Disorders: Official Journal of the Movement Disorder Society
Saul Wilson, Kingsley O Abode-Iyamah, John W Miller, Chandan G Reddy, Sina Safayi, Douglas C Fredericks, Nicholas D Jeffery, Nicole A DeVries-Watson, Sara K Shivapour, Stephanus Viljoen, Brian D Dalm, Katherine N Gibson-Corley, Michael D Johnson, George T Gillies, Matthew A Howard
OBJECTIVE: To develop a large animal model of spinal cord injury (SCI), for use in translational studies of spinal cord stimulation (SCS) in the treatment of spasticity. We seek to establish thresholds for the SCS parameters associated with reduction of post-SCI spasticity in the pelvic limbs, with implications for patients. STUDY DESIGN: The weight-drop method was used to create a moderate SCI in adult sheep, leading to mild spasticity in the pelvic limbs. Electrodes for electromyography (EMG) and an epidural spinal cord stimulator were then implanted...
October 19, 2016: Journal of Spinal Cord Medicine
Jerry M Green
Glyphosate and glyphosate-resistant crops had a revolutionary impact on weed management practices, but the epidemic of glyphosate-resistant (GR) weeds is rapidly decreasing the value of these technologies. In areas that fully adopted glyphosate and GR crops, GR weeds evolved and glyphosate and glyphosate traits now must be combined with other technologies. The chemical company solution is to combine glyphosate with other chemicals, and the seed company solution is to combine glyphosate resistance with other traits...
October 18, 2016: Pest Management Science
Alexander E Lang, Sonja Kühn, Hans Georg Mannherz
Actin is one of the most abundant cellular proteins and an essential constituent of the actin cytoskeleton, which by its dynamic behavior participates in many cellular activities. The organization of the actin cytoskeleton is regulated by a large number of proteins and represents one of the major targets of bacterial toxins. A number of bacterial effector proteins directly modify actin: Clostridial bacteria produce toxins, which ADP-ribosylate actin at Arg177 leading to inhibition of actin polymerization. The bacterium Photorhabdus luminescens produces several types of protein toxins, including the high molecular weight Tc toxin complex, whose component TccC3 ADP-ribosylates actin at Thr148 promoting polymerization and aggregation of intracellular F-actin leading to inhibition of several cellular functions, such as phagocytosis...
October 19, 2016: Current Topics in Microbiology and Immunology
Hye Jin Kim, Hae Min Yoon, Oran Kwon, Won Jun Lee
PURPOSE: Pueraria lobata/rehmannia glutinosa (PR) and exercise have been receiving a lot of attention from postmenopausal women, as a result of the side effects of estrogen replacement therapy. However, the effects of PR and exercise on fatty acid transporters (FATPs), which play essential role in fatty acid transport, have not been studied. In this study, we evaluated the effects of PR and aerobic exercise on FATP1, FABPpm and FAT/CD36 expression in ovariectomized rat skeletal muscles...
September 2016: Journal of Exercise Nutrition & Biochemistry
Ali Eshraghi, Reyhaneh Takalloo Ebdali, Seyed Sajed Sajjadi, Reza Golnezhad
INTRODUCTION: It is believed that an exaggerated blood pressure response (EBPR) to exercise stress test is associated with a higher risk of cardiovascular events. It is also assumed that QT dispersion (QT-d), which was originally proposed to measure the spatial dispersion of ventricular recovery times, may have a relationship to cardiovascular events. The objective of this study was to examine the difference of changes in QT-d, Maxi-QT, Mini-QT, and QT-c (corrected QT interval) of the electrocardiogram in two groups of patients with exaggerated blood pressure responses (EBPR group) and normal responses (control group) to exercise testing...
August 2016: Electronic Physician
HaoYuan Hsiao, Thomas M Zabielski, Jacqueline A Palmer, Jill S Higginson, Stuart A Binder-Macleod
Recent rehabilitation approaches for individuals poststroke have focused on improving walking speed because it is a reliable measurement that is associated with quality of life. Previous studies have demonstrated that propulsion, the force used to propel the body forward, determines walking speed. However, there are several different ways of measuring propulsion and no studies have identified which measurement best reflects differences in walking speed. The primary purposes of this study were to determine for individuals poststroke, which measurement of propulsion (1) is most closely related to their self-selected walking speeds and (2) best reflects changes in walking speed within a session...
October 8, 2016: Journal of Biomechanics
Steven J Keteyian, Dennis J Kerrigan, Jonathan K Ehrman, Clinton A Brawner
PURPOSE: To describe exercise training workloads, estimated as metabolic equivalents of task (METs) both upon exit from cardiac rehabilitation (CR) and as the change in MET level following CR, stratified by age, sex, initial MET level, number of sessions completed, and qualifying event at entry into CR. METHODS: A retrospective study involving 8319 (31% female) patients who completed ≥9 exercise training sessions in the early outpatient CR program at Henry Ford Hospital...
October 14, 2016: Journal of Cardiopulmonary Rehabilitation and Prevention
Hui Li, Jingbo Li, Xiaohong Zhou, Jianrong Zhao, Fengru Zhang, Liqun Wu, Hong Shen, Qing Wan, Jing Huang, Shungang Yang, Ping Wang
Heart failure patients have a high incidence of chronotropic incompetence (CI) that receives less clinical attention. This study assessed a method using wearable devices to identify CI in heart failure patients. Twenty-six heart failure patients (LVEF: 43.9  ±  5.7% with LVEF  ⩾40% in 19 patients; age: 52.8  ±  12.4 years, female patients  =  6) were enrolled. Each patient underwent symptom-limited treadmill maximal exercise testing during which the simultaneous recording of ECG Holter and physical activity using Actigraph was conducted...
October 18, 2016: Physiological Measurement
Kyoung Im Cho, Eun A Cho, Jung Ho Heo, Hyun Su Kim, Sung Il Im, Tae Joon Cha
OBJECTIVE: Increased sympathetic activity is one of the proposed mechanisms underlying exaggerated blood pressure (BP) response to exercise (EBPR). Heart rate recovery (HRR) is a simple non-invasive measurement analyzing autonomic nervous dysfunction, and has been shown to predict cardiovascular disease mortality. We aimed to the association between HRR and EBPR in patients with hypertension according to the circadian pattern and white coat hypertension. DESIGN AND METHOD: A total of 409 consecutive patients who simultaneously underwent Treadmill test and 24-hours ambulatory BP monitoring (ABPM) were included to this cross-sectional case-control study...
September 2016: Journal of Hypertension
Mi-Seung Shin, Seong-Mi Park, Mi-Na Kim, Hack-Lyoung Kim, Kyung-Soon Hong, Myung-A Kim, Gil-Ja Shin, Wan-Joo Shim
OBJECTIVE: Left ventricular hypertrophy (LVH) and coronary atherosclerosis are common cardiac complications of hypertension. Previous studies have shown that LVH is associated with increased cardiovascular mortality, regardless of coronary artery disease. The purpose of this study was to evaluate the relationship between LVH and significant coronary arterial stenosis in hypertensive women with chest pain. DESIGN AND METHOD: One hundred ninety four hypertensive women with eligible data from the Korean women's chest pain registry (KoROSE) study were included...
September 2016: Journal of Hypertension
Bhupinder Singh, Huy Vo, Shelby L Francis, Kathleen F Janz, John H Yack
PURPOSE: This study assessed the biomechanical gait changes in obese and normal weight female adult subjects following a commonly recommended 30-minute walking session. Hip and knee adduction and extensor moments, which are the primary modulators of frontal and sagittal plane load distribution were hypothesized to increase in obese females following a 30-minute walking period, resulting in more stress across the hip and knee joint. METHODS: Ten obese (37.7 ± 4...
October 6, 2016: Medicine and Science in Sports and Exercise
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