Browsing Research Articles (Physiology) by Subject "Heart rate variability"

Browsing Research Articles (Physiology) by Subject "Heart rate variability"

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  • Autonomic correlates at rest and during evoked attention in children with attention-deficit/hyperactivity disorder and effects of methylphenidate 
    Negrao, Bianca Lee; Bipath, Priyesh; Van der Westhuizen, Deborah; Viljoen, Margaretha (Karger, 2011-01)
    OBJECTIVE: The aim of this study was to assess autonomic nervous system functioning in children with attention-deficit/hyperactivity disorder (ADHD) and to examine the effects of methylphenidate and focussed attention. ...
  • Cardiovascular health screening among South African students 
    Du Toit, Peet J.; Kruger, Ernst H.; Govender, Catherine; Henning, E.; Kleynhans, Michael; Wood, Paola Silvia; De Villiers, Nico P.; Van Rooyen, J.M.; Fletcher, Lizelle; Grant, C.C. (Catharina Cornelia) (Africa Association for Health, Physical Education, Recreation, Sport and Dance, 2012-03)
    Stress is an unavoidable part of everyday life due to the demands and stressors associated with modern lifestyle. Health risks provoked by this increasingly prevalent condition lead to cardiovascular disease, which ultimately ...
  • Heart rate variability assessment of the effect of physical training on autonomic cardiac control 
    Grant, C.C. (Catharina Cornelia); Viljoen, Margaretha; Van Rensburg, Dina C.J.; Wood, Paola Silvia (Wiley-Blackwell, 2012)
    BACKGROUND: The effect of exercise interventions on autonomic nervous system (ANS) control of the heart by heart rate variability (HRV) is often investigated in just one position. It was hypothesized that results of ...
  • Postural variations in Cardio Stress Index scores 
    Persad, L. Bagwath; Govender, Catherine; Soma, Prashilla; Du Toit, Peet J.; Kruger, P.E. (Pieter Ernst); Grant, C.C. (Catharina Cornelia); Wood, Paola Silvia (Africa Association for Health, Physical Education, Recreation, Sport and Dance, 2012-03)
    Numerous factors influence heart rate variability, including age, exercise and posture. The Cardio Stress Index (CSI) is a transformed measure of heart rate variability that is determined via a miniature digital multi-channel ...