Social and Behavioral Sciences Commons^™

Musculoskeletal And Estrogen Changes During The Adolescent Growth Spurt In Girls, Catherine Y. Wild, Julie R. Steele, Bridget J. Munro

Faculty of Health and Behavioural Sciences - Papers (Archive)

Introduction: The adolescent growth spurt is associated with rapid growth and hormonal changes, thought to contribute to the increased anterior cruciate ligament injury risk in girls. However, relatively little is known about these musculoskeletal and estrogen changes during the growth spurt in girls. Purpose: To investigate the longitudinal changes in estrogen as well as anterior knee laxity and lower limb strength and flexibility throughout the adolescent growth spurt in girls. Methods: Thirty-three healthy girls, age 10-13 yr, in Tanner stage II and 4-6 months from their peak height velocity were recruited. Participants were tested up to four times during the …

Australian Adolescents' Compliance With Sun Protection Behaviours During Summer: The Importance Of The School Context, Melinda Williams, Sandra C. Jones, Peter Caputi, Donald Iverson

Faculty of Health and Behavioural Sciences - Papers (Archive)

Adolescents exhibit significantly lower sun protection behaviours than adults in Australia. While many studies have assessed the sun protection behaviours of adolescents during summer, few studies have explored the differences in sun protection behaviours of adolescents across key contexts relevant to adolescents during summer—notably school time, weekends and school holidays. Greater understanding of differences in behaviours across these contexts provides more detailed explanations of the nature of adolescent ultraviolet exposure and thereby facilitates improved targeting of interventions for this segment whose behaviour is considered hard to change. In this study, we explore the differences in self-reported, habitual, sun protection behaviours …

Vection During Conflicting Multisensory Information About The Axis, Magnitude And Direction Of Self-Motion, April Ash, Stephen Palmisano

Faculty of Health and Behavioural Sciences - Papers (Archive)

We examined the vection induced by consistent and conflicting multisensory information about self-motion. Observers viewed displays simulating constant-velocity self-motion in depth while physically oscillating their heads left ^ right or back ^ forth in time with a metronome. Their tracked head movements were either ignored or incorporated directly into the self-motion display (as an added simulated self-acceleration). When this head oscillation was updated into displays, sensory conflict was generated by simulating oscillation along: (i) an orthogonal axis to the head movement; or (ii) the same axis, but in a non-ecological direction. Simulated head oscillation always produced stronger vection than `no …

What Influences Australian Women To Not Drink During Pregnancy?, Sandra C. Jones, Joanne Telenta

Faculty of Health and Behavioural Sciences - Papers (Archive)

There is a strong social norm against consuming alcohol during pregnancy. However, many women do not realise they are pregnant until the sixth week and are not provided with information about the risks of consuming alcohol until they visit a health professional in the second trimester. We conducted semi-structured interviews with 12 midwives and 12 pregnant women from two regions inNSWin 2008–09 to explore attitudes towards alcohol consumption during pregnancy, and the factors that may encourage or inhibit women from following the recommendation to abstain from drinking while pregnant. Both groups noted the social issues around pregnant women consuming alcohol …

Influence Of High Glycemic Index And Glycemic Load Diets On Blood Pressure During Adolescence, Bamini Gopinath, Victoria M. Flood, Elena Rochtchina, Louise A. Baur, Wayne Smith, Paul Mitchell

Faculty of Health and Behavioural Sciences - Papers (Archive)

We aimed to prospectively examine the association between the glycemic index and glycemic load of foods consumed and the dietary intakes of carbohydrates, sugars, fiber, and principal carbohydrate-containing food groups (eg, breads, cereals, and sugary drinks) with changes in blood pressure during adolescence. A total of 858 students aged 12 years at baseline (422 girls and 436 boys) were examined from 2004-2005 to 2009-2011. Dietary data were assessed from validated semiquantitative food frequency questionnaires. Blood pressure was measured using a standard protocol. In girls, after adjusting for age, ethnicity, parental education, parental history of hypertension, baseline height, baseline blood pressure, …

Poor Knowledge And Practices Related To Iodine Nutrition During Pregnancy And Lactation In Australian Women: Pre-And Post-Iodine Fortification, Karen Charlton, Heather Yeatman, Catherine Lucas, Samantha Axford, Luke Gemming, Fiona Houweling, Alison Goodfellow, Gary Ma

Faculty of Health and Behavioural Sciences - Papers (Archive)

A before-after review was undertaken to assess whether knowledge and practices related to iodine nutrition, supplementation and fortification has improved in Australian women since the introduction of mandatory iodine fortification in 2009. Surveys of pregnant (n = 139) and non-pregnant (n = 75) women in 2007-2008 are compared with surveys of pregnant (n = 147) and lactating women (n = 60) one to two years post-fortification in a regional area of New South Wales, Australia. A self-administered questionnaire was completed and dietary intake of iodine was assessed using a validated food frequency questionnaire. A generally poor knowledge about the role …

Seven Out Of Ten Most Popular Vegetables Remain Top Choice During First 3 Months Of A 12 Month Weight Loss Dietary Intervention Trial, Jane O'Shea, Yasmine Probst, Rebecca Thorne, Sara Grafenauer, Linda Tapsell

Faculty of Health and Behavioural Sciences - Papers (Archive)

Increasing vegetable consumption is part of dietary advice for weight loss, but how this converts to vegetable choices is not known. In this context, our aim was to identify the main vegetable groups reported by the study sample in the Healthy Eating and Lifestyle Trial [ACTRN1260000784011] at baseline (Oct 2010-Feb 2011) and after 3mo (Feb - May 2011). Data from diet histories (DH) were analyzed using the AUSNUT 2007 database in Foodworks (Xyris, version 6.0.2562) to determine the average daily amount (g) of vegetables consumed by the study sample. Baseline DH (n=113 subjects; 85 female) exposed 32 vegetable categories. The …

Activity Counts From Accelerometers Do Not Add Value To Energy Expenditure Predictions In Sedentary Overweight Individuals During Weight Loss Interventions, Sze Yen Tan, Marijka Batterham, Linda C. Tapsell

Faculty of Health and Behavioural Sciences - Papers (Archive)

Background: Knowing the total energy expenditure (TEE) of overweight adults is important for prescribing weight loss interventions. However, objective measurements of TEE may not always be readily available and can be expensive. This study aimed to investigate the validity of RT3 accelerometers in predicting the TEE of sedentary overweight adults, and to identify any sensitivity to anthropometric changes. Methods: The analysis used data from a 12-week weight loss study. At baseline and 12-week, TEE was predicted using RT3 accelerometers during whole room calorimeter stays. Bias between 2 methods was compared at and between the baseline and 12-week measurement points. Multiple …

An Investigation Of Forearm Vasomotor And Sudomotor Thresholds During Passive Heating, Following Whole-Body Cooling, Joanne N. Caldwell, Asa Nykvist, Nicholas Powers, Sean R. Notley, Daniel S. Lee, Gregory E. Peoples, Nigel A.S Taylor

Faculty of Health and Behavioural Sciences - Papers (Archive)

No abstract provided.

Effects Of High And Low Breast Support On Breast Kinematics And Kinetics During Treadmill Running, Deirdre Mcghee, Julie R. Steele, William J. Zealey

Faculty of Health and Behavioural Sciences - Papers (Archive)

Results: The mean vertical component of the peak bra/breast spring force during treadmill running was greatest during the downward breast trajectory and was approximately 30% less in the high breast support condition (13 N ± 7 N) compared to the low support condition (17 N ± 10 N). This force reduction was accompanied by a 300% decrease in breast and bra discomfort. Conclusion: Wearing a well-fitted supportive sports bra is recommended for females with large breasts to reduce the breast forces and, in tum, exercise induced breast and bra discomfort during physical activity such as treadmill running.

Dietary Behaviours During Pregnancy: Findings From First-Time Mothers In Southwest Sydney, Australia, Li Ming Wen, Judy Simpson, Christopher Rissel, Victoria M. Flood, Louise Baur

Faculty of Health and Behavioural Sciences - Papers (Archive)

Background: Limited prevalence data are available for nutrition related health behaviours during pregnancy. This study aimed to assess dietary behaviours during pregnancy among first-time mothers, and to investigate the relationships between these behaviours and demographic characteristics, so that appropriate dietary intervention strategies for pregnant women can be developed. Method: An analysis of cross-sectional survey was conducted using data from 409 first-time mothers at 26-36 weeks of pregnancy, who participated in the Healthy Beginnings Trial conducted in southwestern Sydney, Australia. Dietary behaviours, including consumption of vegetables, fruit, water, milk, soft drinks, processed meat products, fast foods/take away and chips, were assessed …

'Most Men Drink... Especially Like When They Play Sports' - Alcohol Advertising During Sporting Broadcasts And The Potential Impact On Child Audiences, Sandra C. Jones, Lyn Phillipson, Lance R. Barrie

Faculty of Health and Behavioural Sciences - Papers (Archive)

Alcohol advertising during sporting broadcasts, as well as the sponsorship of sporting events by the alcohol industry, is common practice in Australia, as in many other countries. The strength of the association between alcohol and sports prompts consideration of the potential for children who watch televised sport to be exposed to a considerable amount of alcohol advertising, and to learn to associate alcohol with sport and sporting success. This paper reviews the current alcohol advertising regulations in Australia, particularly in reference to the protection of children. It then details a pair of studies designed to examine the extent and nature …

High Plantar-Flexor Passive Stiffness Increases Achilles Tendon Loading During Landings, John Whitting, Julie R. Steele, Deirdre Mcghee, Bridget J. Munro

Faculty of Health and Behavioural Sciences - Papers (Archive)

No abstract provided.

Do Non-Cholinergic Efferent Pathways Have A Functional Relevance During The Thermal And Non-Thermal Stimulation Of Human Eccrine Sweat Glands?, Christiano A. Machado-Moreira, Peter L. Mclennan, Stephen Lillioja, W Van Dijk, Joanne N. Caldwell, Nigel A. S Taylor

Faculty of Health and Behavioural Sciences - Papers (Archive)

No abstract provided.

Postural Responses To Multidirectional Perturbations To The Hand During Stance, Ali Forghani, Sheida Rabipour, Theodore E. Milner, Paul J. Stapley

Faculty of Health and Behavioural Sciences - Papers (Archive)

Humans are easily able to maintain their balance while applying force with their hands to move or stabilize objects. Based on Newton's laws, the applied force must be counteracted by ground reaction force (GRF) to maintain balance. However, because the GRF is partitioned between the two legs there is no unique solution. Furthermore, central nervous system (CNS) can employ an infinite number of muscle activation patterns to achieve ground reaction force (GRF) vectors needed to satisfy both the task-level goal and balance. This study examines the postural response when hand position must remain stable as an external force is applied …

Immersion Cooling During Hyperthermia: Why Warmer May Be Better, Joanne N. Caldwell, Anne M. J Van Den Heuvel, Pete Kerry, Mitchell J. Clark, Gregory E. Peoples, Nigel A. S Taylor

Faculty of Health and Behavioural Sciences - Papers (Archive)

A significant number of military personnel suffer from exertional heat illness, with some extreme cases resulting in death. These illnesses may occur without warning, they are often characterised by a rapid onset and can occur even in experienced personnel. Various field treatments for hyperthermia have been developed, and one of particular interest is the use of cold-water immersion. Not surprisingly, immersion in ice-cold water (0-2oC) has been shown to be an effective means of rapidly reducing body core temperature (Proulx et al., 2003, 2006).

Revisiting Indices Of Hydration State During Progressive Dehydration To A 7% Water Deficit, Nigel A.S. Taylor, Anne M.J. Van Den Heuvel, Pete Kerry, Sheena S. Mcghee, Christiano A. Machado-Moreira, Marc A. Brown, Gregory E. Peoples

Faculty of Health and Behavioural Sciences - Papers (Archive)

Taylor, N. A.S.., van den Heuvel, A. M.J.., Kerry, P., McGhee, S. S., Machado-Moreira, C. A., Brown, M. A. & Peoples, G. E. Revisiting indices of hydration state during progressive dehydration to a 7% water deficit. Thirteenth International Conference on Environmental Ergonomics; Boston, USA: 2009. 286-289.

Does Lower Limb Neuromuscular Control Differ During Side-Step And Split-Step Cutting Manoeuvres?, Bridget J. Munro, Grant Trewartha, Julie R. Steele

Faculty of Health and Behavioural Sciences - Papers (Archive)

During side-step cutting, all the monitored muscles were recruited simultaneously reflecting co-contraction. Conversely, during split-step cutting, rectus femoris was initially recruited, followed by synchronous vastii and medial hamstrings onset and then lateral hamstring muscle onset. Although there were subtle differences in onset, the hamstrings ceased activity earlier than the quadriceps muscles in both cutting manoeuvres. Paired t-tests indicated that vastus medialis displayed a significantly (p < 0.02) earlier onset in the side-step compared to the split-step and rectus femoris displayed significantly (p = 0.05) longer burst duration in the split-step compared to the side-step. Whether these altered neuromuscular patterns are protective to the knee during split-step cutting manoeuvres, perhaps due to reduced anterior drawer, warrants further investigation. However, should the neuromuscular patterns observed in the split-step protect the ACL from injury, research should also investigate whether split-step cutting manoeuvres display any performance detriment compared to side-step cutting manoeuvres.

Psychophysiological Responses To Win And Loss Events During Electronic Gaming Machine (Egm) Play: A Pilot Investigation, Benjamin Wilkes, Craig J. Gonsalvez, Alex Blaszczynski

Faculty of Health and Behavioural Sciences - Papers (Archive)

The pilot study used state-of-the art psychophysiological equipment to monitor, on a second-bysecond basis, skin conductance level (SCL) and heart rate (HR) of university students (n = 12) in response to win and loss events while playing an electronic gaming machine (EGM). Each win and loss event was recorded and physiological changes associated with these events sorted and averaged based on event type (win/loss) and time (pre and post events). Compared to pre-event baselines, both SCL and HR increased following the occurrence of a win but not to a loss event. SCL was the more sensitive of the two measures, …

The Effect Of A Calorie Controlled Diet Containing Walnuts On Substrate Oxidation During 8-Hours In A Room Calorimeter, Linda C. Tapsell, Marijka Batterham, Sze Yen Tan, Eva M. Warensjo

Faculty of Health and Behavioural Sciences - Papers (Archive)

Objective Dietary macronutrient proportions affect substrate utilization, but in practice people consume foods. We hypothesized that in overweight adults, a calorie controlled diet based on core foods and including walnuts may be advantageous in promoting greater use of fat stores. Methods This crossover study tested the effects of diet-related energy expenditure and fat oxidation in 16 overweight individuals over an 8-hour period. The 2 diets included breakfast and lunch meals during the measurement period and an evening meal the night before. They comprised core foods of bread/cereals, fruit, vegetables, milk/yogurt, and meat, and either walnuts (walnut diet) or olive oil …

Women's Awareness Of The Importance Of Long-Chain Omega-3 Polyunsaturated Fatty Acid Consumption During Pregnancy: Knowledge Of Risks, Benefits And Information Accessibility, Danka S. Sinikovic, Heather R. Yeatman, Deborah Cameron, Barbara J. Meyer

Faculty of Health and Behavioural Sciences - Papers (Archive)

OBJECTIVE: To evaluate pregnant women's knowledge regarding the importance of long-chain omega-3 polyunsaturated fatty acids (LC n-3 PUFA) consumption during pregnancy and assess their views on current information availability.

DESIGN: A 27-item demographic and food safety/behaviour questionnaire was administered to pregnant women during their antenatal clinic visits. chi2 tests were performed using SPSS.

SETTING: Antenatal clinics at two regional hospitals in New South Wales, Australia.

SUBJECTS: One hundred and ninety (n 190) pregnant women.

RESULTS: Three quarters of the women had not received information regarding LC n-3 PUFA. Approximately half of the women were aware …

Glideslope Perception During Aircraft Landing, Rebecca Murray, Robert S. Allison, Stephen A. Palmisano

Faculty of Health and Behavioural Sciences - Papers (Archive)

Ideally, when a pilot approaches a runway on their final approach for landing, they must maintain a constant trajectory, or glideslope, of typically 3°-4°. If pilots misperceive their glideslope and alter their flight path accordingly, they are likely to overshoot or undershoot their desired touch down point on the runway. This experiment examined the accuracy of passive glideslope perceptions during simulated fixed-wing aircraft landings. 17 university students were repeatedly exposed to the following four landing scene conditions: (i) a daylight scene of a runway surrounded by buildings and lying on a 100 km deep texture mapped ground plane; (ii) a …

Sweating And Skin Blood Flow Changes During Progressive Dehydration, Christiano Machado-Moreira, Joanne Caldwell, Anne Van Den Heuvel, Pete Kerry, Gregory E. Peoples, Nigel A.S. Taylor

Faculty of Health and Behavioural Sciences - Papers (Archive)

Cutaneous vasodilatation is essential for the convective delivery of heat from the body core to the periphery, whilst the evaporation of sweat dissipates this heat from the skin surface. Both of these physiological mechanisms must continue to function optimally for effective body temperature regulation to be sustained when exercising in the heat.

Cardiac Electrophysiology During Progressive And Controlled Dehydration: Inferences From Ecg Analysis During Steady-State Exercise And Recovery, Gregory E. Peoples, M. Brown, Anne M.J Van Den Heuvel, Pete Kerry, Nigel A.S. Taylor

Faculty of Health and Behavioural Sciences - Papers (Archive)

When fluid intake is insufficient to match sweat losses, dehydration develops. It is well established that dehydration impacts unfavourably upon cardiovascular function, including cardiac output and peripheral blood flow (Gonzalez-Alonso et al., 1998). However, the limitations of cardiac electrophysiology in the dehydrated state are not known. In light of possible electrolyte imbalances, particularly when water deficit moves towards 7% of total body mass, it is worth considering the possibility of adverse conduction changes, as reflected within the electrocardiogram (ECG), may accompany electrolyte loss. In addition, the ECG can also be employed to investigate other cardiac limitations, such as myocardial ischaemia. …

Time-To-Contact Perception During Simulated Night Landing, Gavin Prowse, Stephen A. Palmisano, Simone K. Favelle

Faculty of Health and Behavioural Sciences - Papers (Archive)

In 2 experiments, nonpilots made time-to-contact (TTC) judgments during simulated oblique descents toward a groundplane. Experiment 1 revealed a significant effect of simulated glideslope on TTC judgments: 3-degree simulations were underestimated, 6-degree simulations were generally accurate, and 9-degree simulations were overestimated. However, there was a significant reduction in this glideslope effect when the simulated aimpoint was explicitly (as opposed to implicitly) identified throughout the display. This glideslope effect was also found to disappear in Experiment 2, when aimpoint distance was held constant for all glideslopes, suggesting that TTC was being indirectly calculated based on perceived distance.

Bone Mineral Density And Content During Weight Cycling In Female Rats: Effects Of Dietary Amylase-Resistant Starch, Ian L. Brown, Hasina Ambia-Sobhan, Abigail E. Huang, Sue A. Shapses, Sugeet Jagpal, John D. Bogden, Francis W. Kemp, Anne M. Birkett

Faculty of Health and Behavioural Sciences - Papers (Archive)

ABSTRACT: BACKGROUND: Although there is considerable evidence for a loss of bone mass with weight loss, the few human studies on the relationship between weight cycling and bone mass or density have differing results. Further, very few studies assessed the role of dietary composition on bone mass during weight cycling. The primary objective of this study was to determine if a diet high in amylase-resistant starch (RS2), which has been shown to increase absorption and balance of dietary minerals, can prevent or reduce loss of bone mass during weight cycling. METHODS: Female Sprague-Dawley (SD) rats (n=84, age = 20 weeks) …

Arousal And Activation Effects On Physiological And Behavioral Responding During A Continuous Performance Task, Jacqueline A. Rushby, Robert J. Barry, Adam R. Clarke, Mohammad Vaezmousavi

Faculty of Health and Behavioural Sciences - Papers (Archive)

Based on previous work indicating different neural substrates, two aspects of energetic state, arousal and activation, have been conceptualised separately in our laboratory. Arousal has been defined as the energetic state at any particular time, and task-related activation as the task-related change in state from resting baseline to the task situation. Both are reflected in electrodermal activity and measured by skin conductance level. Our previous studies in this area have indicated that physiological responses to stimuli in a task are dependent on the arousal level at the time of stimulus presentation, rather than the task-related activation. In contrast, performance on …

The Role Of Achievement Goal Orientation In The Development Of Self Efficacy During Computer Training, Anura Rohan Jayasuriya, Peter Caputi, Parri Gregory, Joseph A. Meloche

Faculty of Health and Behavioural Sciences - Papers (Archive)

Computer self-efficacy (CSE) is a key factor that is related to performance in computer training. A study was conducted to understand the effects of achievement goal orientation on computer self efficacy development with 166 trainees using a database application. Results show that trainees with different achievement motivation dispositions have affects on CSE development through different paths. Individuals with high mastery approach and performance approach dispositions have positive effects on pre training CSE. Mastery avoidance disposition increases Computer Anxiety (CA), this is not seen with performance avoidance. Performance approach affects CSE development by increasing effort. The study provides initial evidence for …

The Effect Of A Low Glycemic Index Diet During Pregnancy On Obstetric Outcomes, Robert G. Moses, M J. Luebcke, Warren S. Davis, K J. Coleman, Linda C. Tapsell, Peter Petocz, Jennie C. Brand-Miller

Faculty of Health and Behavioural Sciences - Papers (Archive)

Abstract presented at The 2006 Annual Scientific Meeting of the Nutrition Society of Australia, 29 November - 2 December, Sydney, Australia

Illusory Scene Distortion Occurs During Perceived Self-Rotation In Roll, Stephen A. Palmisano, Ian P. Howard, Robert S. Allison

Faculty of Health and Behavioural Sciences - Papers (Archive)

We report a novel illusory distortion of the visual scene, which became apparent during both: (i) observer rotation inside a furnishedstationary room; and (ii) room rotation about the stationary observer. While this distortion had several manifestations, the most commonexperience was that scenery near Wxation appeared to sometimes lead and other times lag more peripheral scenery. Across a series ofexperiments, we eliminated explanations based on eye-movements, distance misperception, peripheral aliasing, diVerential motion sensitivityand adaptation. We found that these illusory scene distortions occurred only when the observer perceived (real or illusory) changesin self-tilt and maintained a stable Wxation.