A5001630380- Heart Rate Variability and Autonomic Control
- Cardiac, Anesthesia and Surgical Outcomes
- Hemodynamic Monitoring and Therapy
- Sports Performance and Training
- Cardiovascular and exercise physiology
- Muscle metabolism and nutrition
- Diet and metabolism studies
- Muscle activation and electromyography studies
- Mental Health Research Topics
- Neural and Behavioral Psychology Studies
- Eating Disorders and Behaviors
- Aortic Disease and Treatment Approaches
- EEG and Brain-Computer Interfaces
- Cardiovascular Function and Risk Factors
- Physical Activity and Health
- Mindfulness and Compassion Interventions
- Pulmonary Hypertension Research and Treatments
- Genetics and Physical Performance
- Ultrasound in Clinical Applications
- Cardiac Health and Mental Health
- Cardiac Valve Diseases and Treatments
- Tracheal and airway disorders
- Motor Control and Adaptation
- Congenital Diaphragmatic Hernia Studies
- Behavioral Health and Interventions
University of Cape Town
2015-2024
Sports Science Institute of South Africa
1999-2020
University Hospital Heidelberg
2005-2018
Heidelberg University
2001-2018
University of Essex
2016
Brock University
2016
Vrije Universiteit Brussel
2016
Universidade de São Paulo
2016
University Hospital Regensburg
2006
Chirurgische Universitätsklinik Heidelberg
2005
Abstract The aim of this study was to examine the effect 10 minutes heart rate variability (HRV) biofeedback on cognitive performance and affect scores during induced stress. Eighteen healthy male volunteers (aged 23–41 years) exposed work‐related stress, were randomised into an HRV intervention (BIO) a comparative group (COM). Subjects completed modified Stroop task, which included having mentally count 18 white squares randomly presented between colour words, before after 10‐minute...
Introduction: In this study we examined the pacing strategy and end muscle glycogen contents in eight cyclists, once when they were carbohydrate loaded non-loaded. Methods: Cyclists completed 2 hours of cycling at ∼73% maximum oxygen consumption, which included five sprints 100% peak sustained power output every 20 minutes, followed immediately by a 1 hour time trial. Muscle biopsies performed before after exercise, while blood samples taken during steady state rides exercise. Results:...
Abstract South Africans living in low socioeconomic areas have self-reported unusually long sleep durations (approximately 9–10 h). One hypothesis is that these may be a compensatory response to poor quality as result of stressful environments. This study aimed investigate whether fear not being safe during associated with markers or duration men and women. (n = 411, 25–50 y, 57% women) African-origin an urban township, characterised by high crime poverty rates, participated this study....
Objective Ageing is associated with a progressive decline in physical function and cognitive performance which could result shift from an independent to more dependent lifestyle. The aim of this research study was assess the fitness, functional ability independently living older South Africans determine fitness parameters tests best explain variance function. Design Descriptive observational study. Participants Older adults mean age 71±4.7 years (n = 70; 28 men 42 women) were recruited....
Background: Previous studies have demonstrated that there is a lack of agreement between intermittent cold bolus thermodilution (ICO) and semicontinuous method with dilution heat (CCO) in cardiac surgical patients following hypothermic extracorporeal circulation (HCPB). Therefore, the aim present study was to compare both ICO CCO continuous pulse contour analysis (PCCO): based on fundamentally different principle determining output (CO). Methods: A prospective criterion standard 25 surgery...
Objective: Right ventricular function is an important aspect of global cardiac performance which affects patients' outcome after surgery. Due to its geometrical complexity, the assessment right still a very difficult task. Aim this study was investigate value new technique for intraoperative ventricle based on transesophageal 3D-echocardiography, and compare it volumetric thermodilution by using generation fast response thermistor pulmonary artery catheters. Methods: Twenty-five patients...
This study compared the effects of supplementing normal diets 8 endurance-trained cyclists with additional carbohydrate (CHO), in form potato starch, for 3 days on muscle glycogen utilization and performance during a 3-hr cycle ride. On two occasions prior to trial, subjects ingested random order either their CHO intake 6.15 ± 0.23 g/kg body mass/day or high-CHO diet 10.52 0.57 mass/day. The trial consisted 2 hr cycling at ~75% five 60-s sprints 100% 20-min intervals, followed by 60-min...
This study examines the acute effect of heart rate variability (HRV) biofeedback on anxiety and relaxation states. Eighteen healthy males exposed to work-related stress were randomized into an HRV group (BIO) or comparative (COM). The device used by COM appeared identical device, however, it did not provide biofeedback, rather displayed a wave which subjects instructed observe. Subjects completed modified Stroop task before after 10-min intervention. Spielberger Trait Anxiety Inventory...
Purpose The effects of aging on physical and mental health may be ameliorated by regular participation in activity (PA). There is also evidence for the benefits various training modalities cognition functional ability older adults. aim this study was to compare a 12-week active video gaming intervention (X Box Kinect Sports) conventional multimodal supervised exercise fitness, cognitive performance adults with memory complaints. Methods Participants (n = 45, 72±5 yrs.) were recruited from 6...
<b>Background:</b> Steroid hormone receptors such as glucocorticoid receptors, androgen and oestrogen α (ERα) β (ERβ) have been identified in synovial cells of patients with rheumatoid arthritis osteoarthritis. <b>Objectives:</b> To find a quantitative relationship between the number receptor positive markers inflammation, to compare two groups <b>Methods:</b> A total 36 (n = 17) osteoarthritis 19) were included, cellular inflammation quantified by immunohistochemistry ELISA (interleukin 6...