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Articles 1 - 30 of 57
Full-Text Articles in Medicine and Health Sciences
Learned Social Hopelessness: The Role Of Explanatory Style In Predicting Social Support During Adolescence, Patrick Heaven, Joseph Ciarrochi
Learned Social Hopelessness: The Role Of Explanatory Style In Predicting Social Support During Adolescence, Patrick Heaven, Joseph Ciarrochi
joseph Ciarrochi
No abstract provided.
Cognitive Ability And Health-Related Behaviors During Adolescence: A Prospective Study Across Five Years, Joseph Ciarrochi, Patrick Heaven, Timothy Skinner
Cognitive Ability And Health-Related Behaviors During Adolescence: A Prospective Study Across Five Years, Joseph Ciarrochi, Patrick Heaven, Timothy Skinner
joseph Ciarrochi
Longitudinal research on the links between intelligence and health behaviors among adolescents is rare. We report longitudinal data in which we assessed the relationships between intelligence as assessed in Grade 7 and consequential health outcomes in Grade 11. The mean age of respondents (N=420; 188 males, 232 females) was 12.30 years (SD=0.49) in Grade 7and 16.17 years (SD=0.45) in Grade 11. They completed standardized verbal and numerical ability tests and a measure of conscientiousness in Grade 7 and health related questions in Grade 11. Results indicated that higher intelligence was associated with a number of healthy behaviors including delay in …
Muscles Within Muscles: Coordination Of 19 Muscle Segments Within Three Shoulder Muscles During Isometric Motor Tasks, Darryl Mcandrew, Xu-Feng Huang, James Wickham, Mark Brown
Muscles Within Muscles: Coordination Of 19 Muscle Segments Within Three Shoulder Muscles During Isometric Motor Tasks, Darryl Mcandrew, Xu-Feng Huang, James Wickham, Mark Brown
Darryl J McAndrew
No abstract provided.
Coping Skill Acquisition During Computer-Based Cbt For Co-Occurring Substance Dependence And Depression, A Mitchell, Peter Kelly, Frank Deane, Frances Kay-Lambkin, A Baker
Coping Skill Acquisition During Computer-Based Cbt For Co-Occurring Substance Dependence And Depression, A Mitchell, Peter Kelly, Frank Deane, Frances Kay-Lambkin, A Baker
Peter Kelly
No abstract provided.
Inter-Subject Variability During Combined Strength And Endurance Training, John Sampson, Laura Holland
Inter-Subject Variability During Combined Strength And Endurance Training, John Sampson, Laura Holland
John Sampson
No abstract provided.
Australian Adolescents' Compliance With Sun Protection Behaviours During Summer: The Importance Of The School Context, Melinda Williams, Sandra C. Jones, Peter Caputi, Donald Iverson
Australian Adolescents' Compliance With Sun Protection Behaviours During Summer: The Importance Of The School Context, Melinda Williams, Sandra C. Jones, Peter Caputi, Donald Iverson
Sandra Jones
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 …
What Influences Australian Women To Not Drink During Pregnancy?, Sandra C. Jones, Joanne Telenta
What Influences Australian Women To Not Drink During Pregnancy?, Sandra C. Jones, Joanne Telenta
Sandra Jones
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 …
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
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
Karen E. Charlton
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 …
Food And Nutrition Knowledge During Pregnancy - Absence And Opportunity, Heather Yeatman, Dolly Bondarianzadeh, Karen Charlton, Deanne Condon-Paoloni, Luke Gemming, Danka Sinikovic, Barbara Meyer
Food And Nutrition Knowledge During Pregnancy - Absence And Opportunity, Heather Yeatman, Dolly Bondarianzadeh, Karen Charlton, Deanne Condon-Paoloni, Luke Gemming, Danka Sinikovic, Barbara Meyer
Karen E. Charlton
No abstract provided.
Muscle Synergies Of Feed-Forward Postural Adjustments During Reaching To Multi-Directional Targets In Standing, J Leonard, S Chvatal, L Ting, P Stapley
Muscle Synergies Of Feed-Forward Postural Adjustments During Reaching To Multi-Directional Targets In Standing, J Leonard, S Chvatal, L Ting, P Stapley
Dr Paul J Stapley
Standing balance can be controlled using feedback (FB) or feedforward (FF) mechanisms, depending on the nature of a postural disturbance. Unexpected disturbances of balance elicit automatic postural responses (APR) to restore body position (Horak and Macpherson 1996). Studies of APR have shown that the CNS recruits a small number of muscle synergies to simplify complex task-level goals (e.g. CoM stabilization) to produce the appropriate muscle activation patterns (Ting & McKay, 2007). Successful execution of goal-directed voluntary movements while standing requires FF programming of postural adjustments that serve to initiate movement of the body towards the target (preparatory postural adjustment, pPA) …
Decoupling Of Stretch Reflex And Background Muscle Activity During Anticipatory Postural Adjustments In Humans, Siddharth Vedula, Robert Kearney, Ross Wagner, Paul Stapley
Decoupling Of Stretch Reflex And Background Muscle Activity During Anticipatory Postural Adjustments In Humans, Siddharth Vedula, Robert Kearney, Ross Wagner, Paul Stapley
Dr Paul J Stapley
We studied the evolution of stretch reXexes in relation to background electromyographic (EMG) activity in the soleus muscle preceding the onset of voluntary arm raise movements. Our objective was to investigate if changes in reXex EMG and muscle activity occur simultaneously and are similarly scaled in amplitude. Ten human subjects stood with each foot on pedals able to exert short dorsiXexor pulses during stance. Subjects were asked to product consistent voluntary arm raise movements to a target upon a visual cue. In ¼ of trials, no pulse perturbations were given, but in the remaining ¾’s of all trials pulses were …
Postural Responses To Multidirectional Perturbations To The Hand During Stance, Ali Forghani, Sheida Rabipour, Theodore E. Milner, Paul J. Stapley
Postural Responses To Multidirectional Perturbations To The Hand During Stance, Ali Forghani, Sheida Rabipour, Theodore E. Milner, Paul J. Stapley
Dr Paul J Stapley
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 …
Postural Responses To Unexpected Perturbations Of Balance During Reaching, Hari Trivedi, Julia Leonard, Lena Ting, Paul Stapley
Postural Responses To Unexpected Perturbations Of Balance During Reaching, Hari Trivedi, Julia Leonard, Lena Ting, Paul Stapley
Dr Paul J Stapley
To study the interaction between feedforward and feedback modes of postural control, we investigated postural responses during unexpected perturbations of the support surface that occurred during forward reaching in a standing position. We examined postural responses in lower limb muscles of nine human subjects. Baseline measures were obtained when subjects executed reaching movements to a target placed in front of them (R condition) and during postural responses to forward and backward support-surface perturbations (no reaching, P condition) during quiet stance. Perturbations were also given at different delays after the onset of reaching movements (RP conditions) as well as with the …
Bilateral Vestibular Loss In Cats Leads To Active Destabilization Of Balance During Pitch And Roll Rotations Of The Support Surface, Jane Macpherson, Dirk Everaert, Paul Stapley, Lena Ting
Bilateral Vestibular Loss In Cats Leads To Active Destabilization Of Balance During Pitch And Roll Rotations Of The Support Surface, Jane Macpherson, Dirk Everaert, Paul Stapley, Lena Ting
Dr Paul J Stapley
Although the balance difficulties accompanying vestibular loss are well known, the underlying cause remains unclear. We examined the role of vestibular inputs in the automatic postural response (APR) to pitch and roll rotations of the support surface in freely standing cats before and in the first week after bilateral labyrinthectomy. Support surface rotations accelerate the body center of mass toward the downhill side. The normal APR consists of inhibition in the extensors of the uphill limbs and excitation in the downhill limbs to decelerate the body and maintain the alignment of the limbs with respect to earth-vertical. After vestibular lesion, …
Bilateral Vestibular Loss Leads To Active Destabilization Of Balance During Voluntary Head Turns In The Standing Cat, Paul Stapley, Lena Ting, Chen Kuifu, Dirk Everaert, Jane Macpherson
Bilateral Vestibular Loss Leads To Active Destabilization Of Balance During Voluntary Head Turns In The Standing Cat, Paul Stapley, Lena Ting, Chen Kuifu, Dirk Everaert, Jane Macpherson
Dr Paul J Stapley
The purpose of this study was to determine the source of postural instability in labyrinthectomized cats during lateral head turns. Cats were trained to maintain the head in a forward orientation and then perform a rapid, large-amplitude head turn to left or right in yaw, while standing freely on a force platform. Head turns were biomechanically complex with the primary movement in the yaw plane accompanied by an ipsilateral ear-down roll and nose-down pitch. Cats used a strategy of pushing off by activating extensors of the contralateral forelimb while using all four limbs to produce a rotational moment of force …
Posture Control During Online Corrections Of Arm Movements Is Predictive, Julia Leonard, Paul Stapley
Posture Control During Online Corrections Of Arm Movements Is Predictive, Julia Leonard, Paul Stapley
Dr Paul J Stapley
The control of reaching to a target in standing involves the feed-forward programming of associated postural adjustments (a PAs) that decelerate the body and arm toward the target (Leonard et ai, 2009). However, little is known about the control of aPAs in situations where the final position of the target goal shifts after the reach movement has been initiated. We hypothesized that a predictive reprogramming of the aPA would occur prior to the adjustment of the arm movement to ensure correct execution of the reaching movement. Using a double step paradigm, we investigated the postural adjustments in standing humans exposed …
Independent Control Of Limb Force Underlies Stability During Voluntary Head Movements In Standing Humans, Paul Stapley, Alicia Hilderley, Julia Leonard
Independent Control Of Limb Force Underlies Stability During Voluntary Head Movements In Standing Humans, Paul Stapley, Alicia Hilderley, Julia Leonard
Dr Paul J Stapley
Postural stability during voluntary head movements is maintained through the integration of vestibular and neck afferent inputs. These inputs combine to accurately estimate trunk position in space, relative to a turning head. In animals, a loss of vestibular information leads to an active destabilization of balance as neck afferent information is interpreted as a movement of the trunk under a stable head (Stapley et al. 2006).
Musculoskeletal And Estrogen Changes During The Adolescent Growth Spurt In Girls, Catherine Y. Wild, Julie R. Steele, Bridget J. Munro
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 …
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
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
Dr Marijka Batterham
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 …
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
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
Dr Marijka Batterham
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 …
Muscles Within Muscles: Coordination Of 19 Muscle Segments Within Three Shoulder Muscles During Isometric Motor Tasks, Darryl Mcandrew, Xu-Feng Huang, James Wickham, Mark Brown
Muscles Within Muscles: Coordination Of 19 Muscle Segments Within Three Shoulder Muscles During Isometric Motor Tasks, Darryl Mcandrew, Xu-Feng Huang, James Wickham, Mark Brown
Xu-Feng Huang
No abstract provided.
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
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
L. C. Tapsell
Abstract presented at The 2006 Annual Scientific Meeting of the Nutrition Society of Australia, 29 November - 2 December, Sydney, Australia
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
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
L. C. Tapsell
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 …
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
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
L. C. Tapsell
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 …
Australian Adolescents' Compliance With Sun Protection Behaviours During Summer: The Importance Of The School Context, Melinda Williams, Sandra C. Jones, Peter Caputi, Donald Iverson
Australian Adolescents' Compliance With Sun Protection Behaviours During Summer: The Importance Of The School Context, Melinda Williams, Sandra C. Jones, Peter Caputi, Donald Iverson
Don C. Iverson
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 …
Contralateral Strength Facilitation During Attempted High Velocity Movements, Herbert Groeller, John Sampson, Nigel Taylor
Contralateral Strength Facilitation During Attempted High Velocity Movements, Herbert Groeller, John Sampson, Nigel Taylor
John Sampson
No abstract provided.
Australian Adolescents' Compliance With Sun Protection Behaviours During Summer: The Importance Of The School Context, Melinda Williams, Sandra C. Jones, Peter Caputi, Donald Iverson
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
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
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
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, …