Clemens Ley

Bio: Clemens Ley is an academic researcher from University of Vienna. The author has contributed to research in topics: Psychosocial & Health promotion. The author has an hindex of 9, co-authored 30 publications receiving 195 citations. Previous affiliations of Clemens Ley include Health Science University & University of the Western Cape.

"In the Sport I Am Here": Therapeutic Processes and Health Effects of Sport and Exercise on PTSD.

Abstract: Current evidence suggests positive effects of exercise on posttraumatic stress symptoms; however, knowledge about how these effects are achieved is limited. Thus, this study aims to contribute to a more holistic understanding of these effects. We performed a single case study of a war and torture survivor, who was diagnosed with posttraumatic stress disorder (PTSD) and depression, and who was participant of the sport and exercise therapy program Movi Kune. Participant observation was conducted as well as semi-structured interviews with the participant and his psychotherapist. Data analysis resulted in the proposal of different processes: The focus on bodily sensations related to an exposure effect, contributing to improvements in body awareness, coping behavior, and affect regulation, whereas the focus on playing related to an improved performance, presence, enjoyment, and mastery experiences, pointing toward distraction and motivational-restorative effects. The findings also advice to be cautious as participants may be exposed to negative sensations and trauma-related triggers.

Social-Ecological, Motivational and Volitional Factors for Initiating and Maintaining Physical Activity in the Context of HIV.

Abstract: Sport and exercise can have several health benefits for people living with HIV. These benefits can be achieved through different types of physical activity, adapting to disease progression, motivation and social-ecological options. However, physical activity levels and adherence to exercise are generally low in people living with HIV. At the same time, high drop-out rates in intervention studies are prevalent; even though they often entail more favourable conditions than interventions in the natural settings. Thus, in the framework of an intervention study, the present study aims to explore social-ecological, motivational and volitional correlates of South African women living with HIV with regard to physical activity and participation in a sport and exercise health promotion programme. The qualitative data was produced in the framework of a non-randomised pre-post intervention study that evaluated structure, processes and outcomes of a 10-week sport and exercise programme. All 25 participants of the programme were included in this analysis, independent of compliance. Data was produced through questionnaires, participatory group discussions, body image pictures, research diaries and individual semi-structured interviews. All participants lived in a low socioeconomic, disadvantaged setting. Hence, the psychological correlates are contextualised and social-ecological influences on perception and behaviour are discussed. The results show the importance of considering social-cultural and environmental influences on individual motives, perceptions and expectancies, the fear of disclosure and stigmatisation, sport and exercise-specific group dynamics and self-supporting processes. Opportunities and strategies to augment physical activity and participation in sport and exercise programmes in the context of HIV are discussed.

A narrative review of research on the effects of physical activity on people living with HIV and opportunities for health promotion in disadvantaged settings

Abstract: The article explores different types and effects of physical activity for people living with HIV. Considering the lack of studies done in African contexts and the disparity between research settings and natural settings, a narrative review of the literature was conducted and contextualised to South Africa. Various physical, psychological and social-cultural constraints impair the wellbeing of people living with HIV, in part by restricting their participation in physical activities. Apart from the well-studied immediate physiological benefits on health, we argue that physical-sportive group activities, such as sport or recreational games, can improve psychosocial factors and generate holistic health effects for people living with HIV. Group-activity effects could improve individuals' motivation and adherence to participating in physical activities, provided that positive interaction and non-stigmatisation are guaranteed. However, most studies in this field have been limited to the benefits of aerobic exercise and resistance training. There has been little research on the types and different effects of physical activity and adherence to physical activity of people living with HIV in African contexts. Based on an analysis of the different types and effects, we suggest opportunities for and challenges to implementing physical activities for people living with HIV, especially in disadvantaged settings, and also identify gaps in the research to date.

Effects of an exercise programme with people living with HIV: research in a disadvantaged setting.

Abstract: This study aimed to analyse the physical health effects of a community based 10-week physical activity programme with people living with HIV. It was developed, implemented and evaluated in a disadvantaged community in South Africa. A pre-post research design was chosen. Major recruitment and adherence challenges resulted in a small sample. Among the 23 participants who took part in both baseline and final testing, compliant participants ( n = 12) were compared to non-compliant participants ( n = 11). Immunological (CD4, viral load), anthropometric (height, weight, skinfolds and waist to hip ratio), muscular strength (h1RM) and cardiopulmonary fitness (time on treadmill) parameters were measured. The compliant and non-compliant groups were not different at baseline. Muscular strength was the parameter most influenced by compliance with the physical activity programme ( F = 4.516, p = 0.047). Weight loss and improvement in cardiopulmonary fitness were restricted by the duration of the programme, compliance and influencing factors (e.g. nutrition, medication). The increase in strength is significant and meaningful in the context, as the participants’ goals were to look healthy and strong to avoid HIV related stigma. The improvements in appearance were a motivational factor, especially since the changes were made visible in a short time. Practical implications for health promotion are described. More research contextualised in disadvantaged settings is needed. Keywords: exercise, health, health promotion, intervention study, movement, South Africa, sport

Strengthening sense of coherence: opportunities for theory building in health promotion.

Abstract: Sense of coherence (SOC) reflects a coping capacity of people to deal with everyday life stressors and consists of three elements: comprehensibility, manageability and meaningfulness. SOC is often considered to be a stable entity that is developed in young adulthood and stabilizes around the age of 30. Recent studies have questioned this stability of SOC and some studies report on interventions that have been successful in strengthening SOC in adult populations. Currently, however, there is no clear understanding of the mechanisms underlying SOC. As a consequence, it is a challenge to determine what is needed in health promotion activities to strengthen SOC. This article aims to explore the mechanisms underlying SOC as these insights may underpin future health promotion efforts. An exploration of the salutogenic model suggests two important mechanisms: the behavioural and the perceptual. The behavioural mechanism highlights the possibility to empower people to use their resources in stressful situations. The perceptual mechanism suggests that, in order for people to deal with life stressors, it is essential that they are able to reflect on their understanding of the stressful situation and the resources that are available. Based on these mechanisms, we suggest that both empowerment and reflection processes, which are interdependent, may be relevant for health promotion activities that aim to strengthen SOC. The successful application of resources to deal with stressors is not only likely to have a positive influence on health, but also creates consistent and meaningful life experiences that can positively reinforce SOC levels.

The challenge of non-communicable diseases and road traffic injuries in Sub-Saharan Africa : an overview

Abstract: This report draws on a comprehensive review of the literature and on input from policy makers, researchers, and practitioners to address four questions: (1) how is the growing burden of non-communicable diseases (NCDs) and road traffic injuries (RTIs) changing the epidemiology of Sub-Saharan Africa? (2) What determines and drives this burden, and what are the commonalities with communicable diseases? (3) What is the rationale for public intervention? (4) How could resource-constrained governments approach NCD prevention and treatment and road safety in a comprehensive, effective and efficient way? The data show that action against NCDs and RTIs in Sub-Saharan Africa is needed, together with continued efforts to address communicable diseases and maternal and child health as well as to reach the Millennium Development Goals (MDGs). The report suggests that NCDs and RTIs should not be tackled separately as a vertical program, nor should they displace communicable diseases as priorities. Instead, given resource constraints, and some shared determinants, characteristics, and interventions, there is scope for an integrated approach focusing on functions (prevention, treatment, and care) rather than on disease categories. Examples are cited of potential opportunities to integrate and add NCD prevention and treatment into existing services and programs. Proven, cost-effective, prevention interventions are clearly needed, many of which (such as tobacco and alcohol taxes, road safety measures, and fuel-efficient ventilated cook-stoves) require action beyond the health sector. These can deliver broader development benefits in addition to their benefits for health. Selective, evidence-based actions to reduce NCDs and RTIs will address the changing disease burden in Africa and achieve a more sustainable improvement in health outcomes, more efficient use of resources, and better equity across patients and populations.

Effectiveness of Progressive Resistive Exercise (PRE) in the context of HIV: systematic review and meta-analysis using the Cochrane Collaboration protocol.

Abstract: HIV is increasingly considered a chronic illness. More individuals are living longer and aging with the health-related consequences associated with HIV and multi-morbidity. Exercise is a self-management approach that can promote health for people aging with HIV. We examined the safety and effectiveness of progressive resistive exercise (PRE) interventions on immunological, virological, cardiorespiratory, strength, weight, body composition, and psychological outcomes in adults living with HIV. We conducted a systematic review using the Cochrane Collaboration protocol. Searching databases up to April 2013, we included randomized controlled trials that compared PRE with no exercise or another intervention performed at least three times per week for at least four weeks with adults living with HIV. Two reviewers independently determined study eligibility. We extracted data from included studies and assessed risk of bias using the Cochrane Collaboration risk of bias tool. Meta-analyses were conducted using random effects models with Review Manager (RevMan) computer software. Twenty studies met inclusion criteria (n = 764 participants at study completion); the majority of participants were men (77%) taking antiretroviral therapy (14/20 included studies). Exercise interventions included PRE alone (8 studies) or a combination of resistive and aerobic exercise (12 studies) ranging from 6 to 52 weeks in duration. Thirty-four meta-analyses were performed. Results demonstrated statistically significant improvements in cardiorespiratory status (maximum oxygen consumption, exercise time), strength (chest press, knee flexion), weight, and body composition (arm and thigh girth, leg muscle area) among exercisers versus non-exercisers. We found no significant differences in change in CD4 count and viral load. We were unable to perform meta-analyses for psychological outcomes however results from individual studies demonstrated improvements in health-related quality of life with exercisers compared with non-exercisers. Performing progressive resistive exercise (PRE) or a combination of resistive and aerobic exercise at least three times per week for at least six weeks is safe and can lead to improvements in cardiorespiratory fitness, strength, weight, and body composition for adults with HIV. Exercise may be considered a safe and beneficial for enhancing the health of medically stable adults aging with HIV.

Physical activity correlates in people living with HIV/AIDS: a systematic review of 45 studies.

Abstract: Purpose: Understanding barriers and facilitators of physical activity participation in persons living with HIV/AIDS is an essential first step in order to devise effective interventions. Th...