Browsing by Author "Hamer, M."
Now showing items 1-9 of 9
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The association between seven-day objectively measured habitual physical activity and 24 h ambulatory blood pressure: the SABPA study
Hamer, M.; Bruwer, E.J.; De Ridder, J.H.; Swanepoel, M.; Cockeran, M.; Malan, L. (Springer Nature, 2017)Few studies have examined objective physical activity in relation to 24 h ambulatory blood pressure (BP). We aimed to assess the association of 7-day objectively measured habitual physical activity with ambulatory BP in a ... -
Chronic distress and acute vascular stress responses associated with ambulatory blood pressure in low-testosterone African men: the SABPA Study
Malan, N.T.; Hamer, M.; Schutte, A.E.; Huisman, H.W.; Schutte, R.; Smith, W.; Mels, C.M.C.; Van Rooyen, J.M.; Malan, L. (Nature Publishing Group, 2014)It is known that low testosterone (T) and high cortisol levels are associated with hypertension as well as with chronic stress, linking stress with elevated blood pressure (BP). However, the association between acute ... -
Conventional and behavioral risk factors explain differences in sub-clinical vascular disease between black and Caucasian South Africans: the SABPA study
Hamer, M.; Malan, L.; Schutte, A.E.; Huisman, H.W.; Van Rooyen, J.M.; Schutte, Rudolph; Fourie, C.M.T.; Malan, N.T.; Seedat, Y.K. (Elsevier, 2011)Conventional and behavioral risk factors explain differences in sub-clinical vascular disease between black and Caucasian South Africans: The SABPA study Objectives: There is an emerging burden of cardiovascular disease ... -
Defensive coping and subclinical vascular disease risk – associations with autonomic exhaustion in Africans and caucasians: the SABPA study
De Kock, A.; Malan, L.; Malan, N.T.; Hamer, M. (Elsevier, 2012)Objective The defensive active coping response is a recognised cardiovascular risk factor in Africans, especially in men. It is uncertain whether autonomic dysfunction might be the underlying cause. We therefore investigated ... -
Defensive coping facilitates higher blood pressure and early sub–clinical structural vascular disease via alterations in heart rate variability: the SABPA study
Malan, L.; Hamer, M.; Schutte, R.; Van Rooyen, J.M.; Mels, C.M.; Fourie, C.M.T.; Uys, A.S.; Malan, N.T. (Elsevier, 2013)Objectives: Defensive coping (AC) responses in urban African males have been associated with vascular responsiveness, partly explaining autonomic nervous system dysfunction. We therefore aimed to assess whether AC responses ... -
Leukocyte telomere length and hemostatic factors in a South African cohort: the SABPA study
Von Känel, R.; Malan, N.T.; Hamer, M.; Van der Westhuizen, F.H.; Malan, L. (Wiley, 2014)Background Incident atherothrombotic disease is predicted by leukocyte telomere length, a marker of biological age, and hemostatic factor levels, indicating a hypercoagulable state. We hypothesized that shorter telomeres ... -
Metabolic and glutathione redox markers associated with brain-derived neurotrophic factor in depressed African men and women: evidence for counterregulation?
Harvey, B.H.; Hamer, M.; Louw, R.; Van der Westhuizen, F.H.; Malan, L. (Karger, 2013)Background: Major depression is associated with evidence for metabolic and redox imbalance and also with reports of lower serum levels of brain-derived neurotrophic factor (BDNF). However, the relationship between these ... -
Neuro-endocrine coping responses in African and Caucasian teachers from the North-West Province : the SABPA study
De Kock, Andrea (2015)MOTIVATION - Myocardial infarction, stroke and hypertension (HT) prevalence have escalated in urban Africans. Psychosocial stress and behavioural defensive coping (DefS) have been depicted as important contributory factors ... -
Plasma renin responses to mental stress and carotid intima-media thickness in black Africans: the SABPA study
Hamer, M.; Malan, L.; Schutte, A.E.; Huisman, H.W.; Van Rooyen, J.M.; Schutte, R.; Foirie, C.M.T.; Malan, N.T. (Nature Publishing Group, 2011)The renin–angiotensin–aldosterone system can be activated by sympathetic nervous input and is thought to have an important role in the prevalence of hypertension and cardiovascular risk in black Africans. We examined (1) ...