Journal Articles

Permanent URI for this collectionhttps://mro.massey.ac.nz/handle/10179/7915

Browse

Has files: NoSubject: search.filters.subject.1106 Human Movement and Sports Sciences

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Dietary thiols in exercise: oxidative stress defence, exercise performance, and adaptation
    (BioMed Central, 2017) McLeay Y; Stannard S; Houltham S; Starck CS
    Endurance athletes are susceptible to cellular damage initiated by excessive levels of aerobic exercise-produced reactive oxygen species (ROS). Whilst ROS can contribute to the onset of fatigue, there is increasing evidence that they play a crucial role in exercise adaptations. The use of antioxidant supplements such as vitamin C and E in athletes is common; however, their ability to enhance performance and facilitate recovery is controversial, with many studies suggesting a blunting of training adaptations with supplementation. The up-regulation of endogenous antioxidant systems brought about by exercise training allows for greater tolerance to subsequent ROS, thus, athletes may benefit from increasing these systems through dietary thiol donors. Recent work has shown supplementation with a cysteine donor (N-acetylcysteine; NAC) improves antioxidant capacity by augmenting glutathione levels and reducing markers of oxidative stress, as well as ergogenic potential through association with delayed fatigue in numerous experimental models. However, the use of this, and other thiol donors may have adverse physiological effects. A recent discovery for the use of a thiol donor food source, keratin, to potentially enhance endogenous antioxidants may have important implications for endurance athletes hoping to enhance performance and recovery without blunting training adaptations.
  • Thumbnail Image
    Item
    Physical activity participation in community dwelling stroke survivors: Synergy and dissonance between motivation and capability. A qualitative study
    (Elsevier, 2016) Morris JH; Oliver T; Kroll T; Joice SA; Willaims B
    Objectives The evidence supporting benefits of physical activity (PA) on fitness, functioning, health and secondary prevention after strokeis compelling. However, many stroke survivors remain insufficiently active. This study explored survivors’ perspectives and experiences ofPA participation to develop an explanatory framework that physiotherapists and other health professionals can use to develop person-specificstrategies for PA promotion.Design Qualitative study using semi-structured in-depth interviews. Data was audio-recorded and transcribed. Analysis followed theFramework Approach.Setting Community setting, interviews conducted within participants’ homes.Participants Community dwelling stroke survivors (n = 38) six months or more after the end of their rehabilitation, purposively selected bydisability, PA participation and socio-demographic status.Results Findings suggest that survivors’ beliefs, attitudes, and physical and social context generated synergy or dissonance between motivation(desire to be active) and capability (resources to be active) for PA participation. Dissonance occurred when motivated survivors had limitedcapability for activity, often leading to frustration. Confidence to achieve goals and determination to overcome barriers, acted as activitycatalysts when other influences were synergistic. We illustrate these relationships in a dynamic explanatory model that can be used to supportboth novel interventions and personal activity plans.Conclusions This study suggests a shift is required from purely pragmatic approaches to PA promotion towards conceptual solutions. Under-standing how synergy or dissonance between motivation and capability influence individual survivors’ behaviour will support physiotherapists and other health professionals in promoting PA. This study provides a model for developing person-centred, tailored interventions that address barriers encountered by stroke survivors.