South Asian men living in the (UK) have higher rates of Type 2 Diabetes Mellitus (T2DM) compared with their white British counterparts. Diet, physical activity (PA) and sedentary time (ST) are important risk factors for the development of T2DM. The aim of this thesis was to use a mixed-method approach to assess diet, PA and ST, as well as to explore the factors influencing these behaviours in overweight and obese South Asian men living in the UK. Study 1 revealed there is currently insufficient evidence to recommend that any specific diet is superior in improving glycaemic control, but did display the crucial role weight loss plays in the management of T2DM. Study 2 indicated that 54% of overweight and obese UK South Asian men had a ‘healthy’ diet. Results from study 3 indicated that only 24.1% of the men met the minimum PA recommendations. Qualitative findings from study 2 and 3 revealed the unique sociocultural factors influencing diet and PA behaviours in South Asian men. The findings from this thesis can be used to advise the development of culturally tailored programmes and interventions to help reduce T2DM rates in this high-risk population.

Regular moderate-vigorous physical activity (MVPA) is associated with significant physiological and psychological health benefits (Department of Health, DoH, 2004). However, many children are not undertaking recommended levels of physical activity (PA) (DoH, 2009). This research examined relationships between physiological health parameters, psychological determinants and PA levels in 10-14 year old schoolchildren (N = 249) and assessed the influence of three school-based PA interventions on these constructs in the context of the Health And Physical activity Promotion in Youth (HAPPY) study. Study 1 revealed that sedentary behaviours, moderate PA (MPA), vigorous PA (VPA) and MVPA levels were higher on weekdays than weekend days (p < .001). However, schoolchildren’s PA is often difficult to measure accurately. The self-report measure utilised in study 2 underestimated total MVPA versus accelerometry for both sexes on weekdays and girls on weekend days (p < .01). However, study 3 highlighted a lack of agreement between two RT3® triaxial accelerometer cut-offs for all activity categories. The importance of VPA for promoting health was highlighted in the updated PA guidelines (DoH, 2011). Study 4 reported that cardiorespiratory fitness (CRF) was positively associated with VPA but not MPA (β = .27, p < .01) and inversely correlated with measures of body composition (% body fat; body mass index; waist circumference) (r = -.74, r = -.60, r = -.39, p < .001). Knowing the health benefits of regular MVPA and VPA, it is important to understand the determinants of PA intentions and behaviours to more effectively promote PA in less active children (studies 5 and 6). An exploratory analysis of the constructs in the Revised Theory of Planned Behaviour and the Modified Social Learning Theory for children predicted PA intentions (R2 = .38, F(5, 171) = 20.19, p < .001; R2 = .13, F(6, 147) = 3.4, p < .01, respectively) but the constructs in either model were unable to predict PA. Recognising the need to promote PA levels, study 7 investigated the effectiveness of three school-based interventions (vs. control) on outcome variables included in studies 1, and 4-6. The Health Education and Psychology Health Promotion conditions produced significant positive change scores between data collection 2 and 3 for CRF (vs. control) whereas the Youth-Led condition produced significant change scores between baseline and data collection 2 for generalised self-efficacy (vs. control). No significant change scores were reported for PA, the RTPB constructs or intentions. In conclusion, this research has emphasised the importance of employing a multidisciplinary approach to aid understanding of schoolchildren’s PA levels. Specific highlights include low weekend day PA as a possible future PA promotion target, although it is vital that accelerometry cut-points are standardised, and the relevance of VPA and body composition in predicting CRF. The psychological models identified some important determinants of PA intentions, but a prominent intention-behaviour gap and a need for more intensive interventions to promote PA levels was apparent.

The investigation of exercise specific left ventricular (LV) adaptations to training have been predominantly cross sectional in design. The purpose of the current thesis was to investigate LV adaptations to short term (6-9 weeks) training to establish if any changes are exercise specific. A correlation study was used to investigate correlations between cardiac variables and MAXOV2&(study 1). Cardiac variables were found to be the strongest predictors for absolute MAXOV2&, MAXOV2&BM and MAXOV2&FFM in cyclists compared to the total sample or sedentary group, predicting 79% (p<0.01), 70% (p<0.01) and 77% (p<0.01) of the variance, respectively. Secondly, it was found that when MAXOV2& was scaled to body mass (BM) or fat free mass (FFM) cardiac variables predicted less of the variance than for absolute MAXOV2&, for all groups. Study 2 investigated the hypothesis that there would be no evidence of LV hypertrophy when there was no increase in FFM. This was achieved by taking sedentary participants through a resistance training programme of 6 weeks duration to control for increases in skeletal muscle hypertrophy. Both resting systolic blood pressure (sBP; p = 0.01, d = 1.19) and diastolic blood pressure (dBP; p = 0.029, d = 0.88) were significantly reduced following the 6 weeks resistance training. One repetition maximum (1RM) bench press significantly increased (p = 0.00, d = -1.44) as did 1 RM parallel squat strength (p = 0.00, d = -1.86), with no associated increases in relative FFM (p = 0.45) or absolute LM (p = 0.87). There was no adaptation to LV morphology (p>0.05), however early diastolic function changed with a significant decrease in peak E wave (p = 0.00, d = 1.94). Study 3 compared differences in the time course of the initial adaptations to LV structure and function during 9 weeks of aerobic, resistance and combination exercise ii training, to establish whether LV adaptations are exercise specific. The resistance and combination groups demonstrated increases in relative wall thickness (p = 0.021, ηp2 = 0.408; p = 0.004, d = -1.06, respectively). PWd also significantly increased in the combination group (p = 0.032, ηp2 = 0.301); however there were no structural adaptations evident in the aerobic group (p > 0.05). In contrast, the aerobic group demonstrated functional adaptations with a decrease in A wave (p = 0.44, d = 0.87) as did the combination group (p = 0.002, ηp2 = 0.407). The results of the training studies showed limited support for the Morganroth Hypothesis as structural adaptations demonstrated LV remodelling of the myocardial tissue, with no increase in LV mass. Further to this, combination training appears to have an additive effect of LV adaptations of both aerobic and resistance training.

The aim of the present thesis was to examine the potential for acute carbohydrate-protein (CHO-P) ingestion to enhance performance and recovery from exercise designed to simulate the demands of multiple-sprint sports (MSSs). Chapter 3 of the thesis explored the inter- and intra-day reliability and concurrent validity of non-motorised treadmill ergometry (NMT) for the assessment of short-distance sprint performance [i.e. 10-30 m). There were no significant mean differences between NMT variables recorded on the same day or between days. Ratio limits of agreement indicated that the best agreement was in 20 [1.02 */-=- 1.09) and 30 m [1.02 */* 1.07) sprint times, peak [1.00 */T 1.06) and mean (0.99 */+ 1.07) running speed and step length (0.99 */-=- 1.09) and frequency (1.01 */+ 1.06). The poorest agreement was observed for time to peak running speed (1.10 */* 1.47). Significant differences were observed between NMT and over-ground sprint times across all distances, with times being lower (faster) by approximately 25-30% over-ground. The correlations between NMT and over-ground variables were generally modest (r5 = 0.44 - 0.67), and optimal for time to cover 30 m on Day 2 (rs = 0.8). Chapter 4 sought to examine the efficacy of CHO-P ingestion during 4 h of recovery from the Loughborough Intermittent Shuttle Test (LIST) when compared to CHO matched for energy (ISOEN) or CHO (ISOCHO) in a typical CHO beverage. There were significant increases over time in muscle soreness, and reductions in extensor and flexor peak torque (by approximately 9%, 9% and 8%, and 13 %, 13% and 11% at 60 deg-s-1) and jump performance (10%, 7% and 5%) with the ingestion of CHO-P, ISOEN and ISOCHO, respectively. Beverage type x time interactions were not significant for any of these variables, indicating that changes in each variable were similar for all groups. Decrements in sprint performance assessed on the NMT were typically small and not different between beverage types (<4%), although sprint times over 20 and 30 m remained elevated for 48 h post-exercise. Accordingly, Chapter 4 provided no clear evidence for a benefit of ingesting CHO-P in the hours after exercise to enhance recovery of muscle function and selected performance variables following MSS activity. Chapters 5 and 6 of the thesis aimed to examine the effect of CHO-P ingestion during simulated MSS exercise. In Chapter 5, it was observed that sprint times, HR and gut fullness increased over the course of the LIST, with no influence of consuming each of the different beverages. In contrast, there was a main effect of time (P < 0.001), and drink (P = 0.042) observed for RPE, which was lower (P < 0.001) during the LIST in the CHO-P condition (16.9 ± 1.4) than in either the ISOCHO (17.8 ± 1.1) or ISOEN (17.7 ± 1.3). However, time to exhaustion was not different (P = 0.29) between CHO-P (468.3 ± 268.5 s), ISOCHO (443.4 ± 286.3 s) and ISOEN (446.2 ± 282.08 s), although these times did equate to a non-significant mean improvement of 4% in the CHO-P trial. Chapter 6 demonstrated that during a modified version of the LIST with two self-regulated blocks of exercise intensity, participants had a higher average speed (8.1 ± 0.3 cf. 7.9 ± 0.5 knvlr1) during the final (self-regulated) 15 min block of the LIST in the CHO-P condition compared to CHO. Whilst the mechanisms for such an improvement are not certain, the attenuated rise in RPE observed in Chapter 5, and increased blood urea concentration observed in Chapter 6, with CHO-P ingestion may suggest altered central fatigue and/or increased protein oxidation enhances performance during MSSs.

Walking in the countryside is an increasingly popular pursuit in Britain. Much previous research within the social sciences has tended to concentrate on the physiological benefits, barriers or facilitators to walking. This thesis explores particular walkers’ complex motivations for and modes of walking, their individual engagements with certain types of (northern) landscapes and the significance of specific kinds of visual images, traditions and wider practices of looking. Constructions and discourses of landscape are considered in relation to the persistence of certain ideas and aesthetic traditions as well as and in relation to current concerns about individual health and social well-being. The research is multi-disciplinary and engages with studies of art history and visual culture, cultural geography, anthropology and sociology. Visual studies research methods are used to explore individual interpretations and experiences of landscapes, and how the circulation and consumption of particular kinds of images might inform attitudes to walks and walking. Walkers’ views and attitudes have been investigated using an ethnographic approach. In-depth qualitative interviews (including photo elicitation) have been undertaken with walkers who regularly walked five or more miles in the countryside either in organised groups, on their own or with friends and family, in order to capture how walking is perceived, felt, and made sense of. A grounded theory approach has been used for the interviews, building on theories that emerged from systematic comparative analysis, and were grounded in the fieldwork. Overall the thesis observes a marked persistence of and some striking similarities between particular ideas, cultural traditions and interpretations of walking in and ways of looking at types of countryside from the Romantic period to the present day.

The objective of this thesis was to examine how psychological theories and sociological concepts can be used to better understand health behaviour change amongst families living in Everton, north-west England. In doing so, three research questions are addressed: (1) What is the social composition and health status of Everton families and how can these insights be used to inform the development of an intervention which aims to generate positive behaviour change within these families?; (2) How can sociological theories and psychological concepts be used to explain processes of behaviour change amongst families involved in The People’s Family Project?; and (3) How effective is the community-based People’s Family Project in generating positive behaviour change and what are the core mechanisms and processes which help account for any behaviour change? A three-phase approach to the research was adopted in this mixed-methods study undertaken with parents and children and explored using an ecological framework. A process evaluation approach, which drew upon the key sociological theories of figurations, networks of interdependency, habitus, power and capital alongside the psychological constructs of behaviour change, namely self-efficacy and motivation was also used. Phase 1 explored the social demographics and health behaviours of families living in Everton (N=55) to provide the basis of a holistic family-based health intervention (the PFP). Phase 2 included the deployment of pre-intervention measures, intervention delivery, and mid- and immediate-post-intervention outcomes (N=14 families), and Phase 3 included repeat measurements at 6- and 12-months post-intervention (N=7). Results demonstrated that the intervention had little impact on smoking and alcohol behaviours but did have a significant and long-term impact on parental physical activity (PA), and a significant impact on mental well-being and dietary quality, however these changes were not maintained statistically at follow-up. Qualitative analysis suggested the intervention led to various physical, social and psychological benefits for families, which were explained using the programme theory developed as part of the process evaluation.

This thesis used a multi-methods approach to explore children’s out-of-school physical activity (PA). Study 1 found that children living in the most deprived neighbourhoods represent an important target group for future PA and health interventions. Further, the study also revealed that self-reported PA was positively associated with independent mobility. Study 2 confirmed that the weekend was a period of low moderate-to-vigorous PA (MVPA), and revealed that raw PA levels derived from the wrist-worn GENEActiv are not comparable with hip-worn ActiGraph. Agreement between the devices differed according to PA intensity and time of day, with the greatest difference occurring in light PA (LPA) during school hours. Using children’s recounted perceptions and experiences of out-of-school PA, study 3 demonstrated how an inclusive, interactive and child-centred methodology (i.e., write, draw show and tell; WDST) may be advantageous when compared to traditional singular qualitative methods. In study 4 parental safety concerns were reported to be the most consistent barrier to children’s out-of-school PA. The family case studies demonstrated how family perceptions and constraints can influence children’s out-of-school PA levels and activity mode (i.e., active school travel, outdoor play and organised sport). Such constraints include factors such as, school proximity, neighbourhood perceptions and family context. Study 5 revealed substantial intra-individual variability in children’s weekend MVPA. PA diary data revealed that children's weekend PA was mostly unstructured in nature and undertaken with friends, whereas a greater proportion of parents’ weekend PA was undertaken alone in structured settings. Family case studies demonstrated that in the selected cases MVPA levels and variability across weekends were contingent on mode of PA participation. This thesis contributes evidence to inform future out-of-school PA interventions. The research has demonstrated that children’s out-of-school PA is influenced by a complex interaction of individual, social and environmental factors. Specific highlights include the family and neighbourhood environment. The weekend is associated with low PA and as such represents an important time period to promote PA in children. Future weekend PA interventions should target specific modes of activity, as the facilitators and barriers to these activities vary considerably. Moreover, in future, research and practice should focus on ways in which to modify neighbourhood attributes to support children’s out-of-school active living.

The design of the physical learning environment (PLE) in Higher Education facilities, has been found to influence students’ satisfaction (Hill & Epps, 2010, Riley, 2013, Yang & Mino, 2013). With the initiation of the Teaching Excellence Framework, the consideration of students’ satisfaction is becoming more prominent. Beckers et al. (2016a) concluded that further research should explore preferences of students to identify if preferences differed between groups of students. Features of the PLE were identified that required further examination as to the impact they can have on students’ satisfaction, specifically, their individual requirements, which may be influenced by their personality traits. In the quality of the PLE; it was also noted that the sense of community is important. Utilising a sequential mixed methods design this research aimed to identify students’ specific requirements of their PLE. Case study methodology was adopted in Liverpool John Moores University (LJMU), across the schools Art and Design, Built Environment, Engineering and Business. Surveys were used to examine relationships with features of the PLE, school specific requirements and personality traits. Factor analysis was conducted to identify components of the PLE. Focus groups were undertaken with students to explore students’ perceptions of the PLE and expand current understanding regarding students’ specific requirements. Utilising grounded theory analysis, features of the PLE were identified and a framework developed. The research found that there is a notable difference in preferences for features within the PLE between students in different schools, and that these differences may be due to the influence of personality traits. The research also identified a framework for defining what students perceive to be a quality PLE. Alongside which, features of the PLE that students identify as being important for the development of a sense of community were identified. The research has led to the development of a framework for the design of the PLE based on students’ specific requirements that can be used to inform universities of the aspects of design to consider in future developments or refurbishments. Validation of the findings of this research was also conducted to evaluate the usefulness of the final framework.

This thesis aimed to develop a running heat tolerance test (RHTT) to assess changes in heat tolerance and to investigate the mechanism and optimisation of heat acclimation (HA) for female athletes. The first study introduced a RHTT and assessed its repeatability. Results demonstrate good agreement, strong correlations and small differences between repeated trials. The typical error of measure values suggested low within-participant variability. Furthermore, the RHTT was effective in differentiating between individuals’ physiological responses, demonstrating that heat tolerance lies along a continuum. The second study examined the sensitivity of the RHTT to changes in heat tolerance and to evaluate individual responses to HA. Results demonstrate that the RHTT is sensitive to changes in heat tolerance and that the magnitude of adaptation is highly individual; supporting the use of the RHTT in future investigations. Reducing thermal strain through HA in not fully understood for a female population. The third study compared males’ and females’ temporal patterning to short-term HA (STHA; 5-d) and long-term HA (LTHA; 10-d). The RHTT was used to quantify changes in heat tolerance. The results confirm that whilst STHA may be effective in achieving partial adaptation in males and females, females require LTHA to establish reductions in thermoregulatory and cardiovascular strain. Improved thermotolerance following HA, reduces disruptions to cellular homeostasis principally, but not exclusively, by increasing basal heat shock protein 72 following transcription of its gene (Hsp 72 mRNA) as part of the heat shock response (HSR). The fourth study compared males’ and females’ Hsp72 mRNA response during STHA and LTHA. The similar transcription of Hsp72 mRNA observed in all participants suggests that there are no differences in the endogenous criteria to elicit the HSR between sexes. The fifth study assessed the effectiveness of preceding STHA with a passive heat exposure (HAsauna) in females. HAsauna resulted in reductions in thermoregulatory, cardiovascular and perceptual strain. The adaptation pathway was likely mediated in part, by plasma volume expansion and an improved thermoeffector and thermosensitivity response of the sudomotor function. Together, evidence in this thesis supports the notion that special considerations need to be taken when using HA to attenuate thermoregulatory strain in female athletes prior to training and competing in the heat.

Caffeine consistently enhances endurance performance in temperate environmental conditions, while far less research has examined its ergogenic and physiological effects during prolonged exercise in the heat. Despite the performance benefit of an acute caffeine doses being less pronounced in regular caffeine users versus those not habituated to the drug, few studies have examined the influence of a prolonged period of controlled caffeine intake on endurance performance. The endogenous trace amine octopamine is purported to possess stimulant-like properties and influence fat metabolism, although no study has examined these effects in humans. The aim of this thesis was to further characterise the performance and physiological effects of caffeine during prolonged exercise, while elucidating a potential ergogenic role for octopamine. The first two studies investigated the ergogenic and thermoregulatory effects of low to moderate caffeine doses during prolonged cycle exercise in the heat. Chapter 4 demonstrated that 3 mg kg-1 caffeine, administered either as a single or split-dose (2 x 1.5 mg kg-1) before exercise, improved endurance performance without influencing thermoregulation during prolonged exercise at a fixed work-rate. Dividing the caffeine bolus appeared to confer an additional performance benefit, suggesting repeated low dose may potentiate the efficiency of the same total caffeine dose under these conditions. Chapter 5 demonstrated that a 6 mg kg-1 caffeine dose improved endurance cycle performance without differentially influencing thermoregulation than placebo. The level of habituation to caffeine influences the ergogenic effect of an acute dose, yet previous studies have employed sub-chronic supplementation protocols. Chapter 6 investigated the effect of a twenty-eight day supplementation period on endurance cycle performance. Habituation to caffeine attenuated the ergogenic effect of an acute caffeine dose, without any change in circulating caffeine, substrate oxidation or hormonal concentrations. In chapter 7 the performance and metabolic effects of octopamine was investigated. Octopamine supplementation did not influence performance, hormonal concentrations or substrate oxidation, likely due to low serum concentrations of the drug.