Journal Articles
Permanent URI for this collectionhttps://mro.massey.ac.nz/handle/10179/7915
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Item Does cooling affect skeletal muscle glycogen replenishment after an acute bout of fear-induced exertional hyperthermia in blesbok (Damaliscus pygargus phillipsi)?(Elsevier Inc, 2025-11-01) Kohn TA; Martin M; van Boom KM; Donaldson B; Blackhurst DM; Fitte A; Burroughs R; Steyl JCA; Goddard A; Meyer LCRRhabdomyolyses is a clinical sign of capture myopathy in wild animals and may be linked to glycogen metabolism. To study potential mechanisms, 26 wild blesbok were chased for 15 min and immobilised, whereafter 12 of these blesbok were doused with ice-water (n = 14 chased only group; n = 12 chased + cooled group). An additional 12 blesbok served as resting (not chased) uncooled controls. Vastus lateralis biopsies were obtained after immobilisation for biochemical analyses. Biopsies obtained at initial capture, 3- and 16-days post exercise were analysed for glycogen content. Blesbok muscles contained predominantly myosin heavy chain (MHC) IIA (∼50 ± 9 %), followed by IIX (32 ± 10 %) and MHC I (18 ± 5 %), with no difference between groups. Citrate synthase (mean: 87 ± 48), 3-hydroxyacetyl co A dehydrogenase (47 ± 17), lactate dehydrogenase (1567 ± 654), phosphorylase (162 ± 94), phosphofructokinase (250 ± 123) and creatine kinase (12,455 ± 6372) activities (in μmol/min/g prot) were not different between groups. Similarly, superoxide dismutase (7.9 ± 7 U/mg prot), catalase (8.8 ± 5.8 mmol/min/g prot), and overall antioxidant capacity (ORAC: 23055 ± 18,460 μmol/g prot) were not different between groups. Glycogen content was reduced in both chased groups and not replenished by day 3. Glycogen supercompensation was observed on day 16 in both chased groups (∼33 % higher than resting control group). The results confirm that blesbok have high muscle metabolic capacities, and that glycogen resynthesis is slow, which could lead to metabolite deficiency during prolonged chase events (>15 min).Item Dataset describing Aotearoa New Zealand young adults’ psychological well-being and behaviour during nationwide lockdown(Elsevier B.V., 2022-02-01) Broodryk T; Robinson KThis dataset provides a comprehensive snapshot of 277 New Zealand young adult's (M age = 18.93, SD = 3.28) real-time behaviours and experiences during a seven-week nationwide lockdown. Participants were recruited through a university student participant pool and data were collected online during 20–27th April 2020 (Alert Level 4) and 6–13th May 2020 (Alert Level 3), constituting the 26th–33rd and 42nd–49th day (respectively) of a nationwide lockdown to manage the first wave of COVID-19 in Aotearoa New Zealand. Data have been used previously [1]. Data includes participants’ self-reported compliance with legally mandated COVID-19 lockdown policies, as well as participants’ self-reported knowledge of lockdown policies, lockdown characteristics, trust in government and information sources, COVID-19 specific worries, recent anxiety, depression, and stress symptoms, cognitive reappraisal and expressive suppression use, and Big Five personality traits. The dataset is freely accessible (CC-BY-4.0 license) at https://osf.io/pa4n3/. This database can provide insight into the psychological experience of strict COVID-19 lockdown, support policy makers to evaluate the efficiency COVID-19 public health messaging, and inform future policy to support public health and wellbeing during widespread lockdown and quarantine.Item Coping with stress during the COVID-19 pandemic in the oldest-old population(Springer Nature B.V., 2022-12) Gerhards SK; Pabst A; Röhr S; Luppa M; Riedel-Heller SGThe aim of the study is to investigate psychosocial factors that are associated with positive and negative coping with stress, as well as with worries about and perceived threat by COVID-19 to enable us to provide adequate support for oldest-old individuals. A paper–pencil-based survey assessed COVID-19 worries and perceived threat, depression, anxiety, somatization, social support, loneliness, resilience, positive and negative coping in a sample of n = 197 oldest-old individuals (78–100 years). Linear multivariate and binary logistic regression analyses were conducted. Individuals with high levels of resilience were more likely to feel self-efficient when coping with stress. High levels of depression, anxiety and loneliness were associated with feeling more helpless when coping with stress. However, oldest-old individuals who felt lonely also experienced situations where they felt competent in stress coping. Being male and experiencing high levels of social support was more likely associated with high levels of worries due to COVID-19. Increased age and higher levels of depression were associated with lower levels of perceived personal threat, whereas higher somatization scores were more likely associated with higher perceived personal threat. Findings suggest that mental health factors may shape the way oldest-old individuals cope with pandemic-related stress. Resilience might be an important factor to take into account when targeting an improvement in positive coping with stress. Oldest-old individuals who have higher levels of depression, anxiety and feel lonely may be supported by adapting their coping skill repertoire to reduce the feeling of helplessness when coping with stress.Item Evidence of perceived psychosocial stress as a risk factor for stroke in adults: a meta-analysis(BioMed Central, 2015) Booth J; Connelly L; Lawrence M; Chalmers C; Joice S; Becker C; Dougall NAbstract Background : Several studies suggest that perceived psychosocial stress is associated with increased risk of stroke; however results are inconsistent with regard to definitions and measurement of perceived stress, features of individual study design, study conduct and conclusions drawn and no meta-analysis has yet been published. We performed a systematic review and meta-analysis of studies assessing association between perceived psychosocial stress and risk of stroke in adults.The results of the meta-analysis are presented. Methods: Systematic searches of MEDLINE, EMBASE, CINAHL, PsycInfo, and Cochrane Database of Systematic Reviews were undertaken between 1980 and June 2014. Data extraction and quality appraisal was performed by two independent reviewers. Hazard ratios (HR) and odds ratios (OR) were pooled where appropriate. Results: 14 studies were included in the meta-analysis, 10 prospective cohort, 4 case–control design. Overall pooled adjusted effect estimate for risk of total stroke in subjects exposed to general or work stress or to stressful life events was 1.33 (95 % confidence interval [CI], 1.17, 1.50; P < 0.00001). Sub-group analyses showed perceived psychosocial stress to be associated with increased risk of fatal stroke (HR 1.45 95 % CI, 1.19,1.78; P = 0.0002), total ischaemic stroke (HR 1.40 95 % CI, 1.00,1.97; P = 0.05) and total haemorrhagic stroke (HR 1.73 95 % CI, 1.33,2.25; P > 0.0001).A sex difference was noted with higher stroke risk identified for women (HR 1.90 95 % CI, 1.4, 2.56: P < 0.0001) compared to men (HR 1.24 95 % CI, 1.12, 1.36; P < 0.0001). Conclusions: Current evidence indicates that perceived psychosocial stress is independently associated with increased risk of stroke.