Exercise training and impaired glucose tolerance in obese humans

Individuals with impaired glucose tolerance (IGT) are at greater risk of developing diabetes than in normoglycaemia. The aim of this study was to examine the effects of 12-weeks exercise training in obese humans with IGT. Eleven participants (6 males and 5 females; 49±9 years; mean Body Mass Index (BMI) 32.4 kg · m(-2)), completed a 12-week brisk walking intervention (30 min per day, five days a week (d · wk(-1)), at 65% of age-predicted maximal heart rate (HR(max)). Anthropometric measurements, dietary intake, pulse wave velocity (PWV, to determine arterial stiffness) and blood pressure (BP) were examined at baseline and post intervention. Fasting blood glucose, glycosylated haemoglobin, insulin, blood lipids, indices of oxidative stress and inflammation (lipid hydroperoxides; superoxide dismutase; multimeric adiponectin concentration and high-sensitivity C-reactive protein) were also determined. Post intervention, PWV (9.08±1.27 m · s(-1) vs. 8.39±1.21 m · s(-1)), systolic BP (145.4±14.5 vs. 135.8±14.9 mmHg), triglycerides (1.52±0.53 mmol · L(-1) vs. 1.31±0.54 mmol · L(-1)), lipid hydroperoxides (1.20±0.47 μM · L(-1) vs. 0.79±0.32 μM · L(-1)) and anthropometric measures decreased significantly (P < 0.05). Moderate intensity exercise training improves upper limb vascular function in obese humans with IGT, possibly by improving triglyceride metabolism, which may subsequently reduce oxidative stress. These changes were independent of multimeric adiponectin modification and alterations in other blood biomarkers.     

Effects of replica running shoes upon external forces and muscle activity during running

Twelve participants ran (9 km · h(-1)) to test two types of running shoes: replica and original shoes. Ground reaction force, plantar pressure and electromyographic activity were recorded. The shoes were tested randomly and on different days. Comparisons between the two experimental conditions were made by analysis of variance (ANOVA) test (P ≤ 0.05). The time to first peak, loading rate of the first peak and impulse of the first 75 ms of stance were significantly different between the shoes (P ≤ 0.05), revealing an increase of impact forces for the replica shoes. The peak plantar pressure values were significantly higher (P ≤ 0.05) when wearing replica shoes. During running, the contact area was significantly smaller (P ≤ 0.05) for the replica shoe. The electromyographic activity of the analysed muscles did not show changes between the two shoes in running. These findings suggest that the use of replica running shoes can increase the external load applied to the human body, but may not change the muscle activity pattern during locomotion. This new mechanical situation may increase the risk of injuries in these movements.     

Corporal Punishment and Elevated Neural Response to Threat in Children

Spanking remains common around the world, despite evidence linking corporal punishment to detrimental child outcomes. This study tested whether children (M_age = 11.60) who were spanked (N = 40) exhibited altered neural function in response to stimuli that suggest the presence of an environmental threat compared to children who were not spanked (N = 107). Children who were spanked exhibited greater activation in multiple regions of the medial and lateral prefrontal cortex (PFC), including dorsal anterior cingulate cortex, dorsomedial PFC, bilateral frontal pole, and left middle frontal gyrus in response to fearful relative to neutral faces compared to children who were not spanked. These findings suggest that spanking may alter neural responses to environmental threats in a manner similar to more severe forms of maltreatment.     

Connecting with place: implications of integrating cultural values into the school curriculum in Alaska

Many authors primarily from industrialised nations discuss human relationships with the natural environment in the context of global environmental issues, and highlight the close relationships that ‘traditional’ societies have with nature. There is a growing trend among indigenous people in North America to restore such a connection with the land through place‐based education. This article reports on progress on such a programme at Russian Mission School in rural Alaska in the period 2002–2007 and its implications for sustainability. The programme actively seeks to integrate the community’s cultural values and activities into their curriculum. This has resulted in raising pupils’ academic skills and confidence, and seems to be bridging a gap of distrust between the school and community. An ethnographical approach was adopted with a mixed research design based primarily on participant observation, supported by semi‐structured interviews, written surveys, and conversations with stakeholders, student writings and secondary sources. The initial fieldwork in 2002 was followed up five years later.     

The development of a group test of formal operational logic in the content area of environmental science

An instrument was developed to assess the logical reasoning capacity of adolescents in the content area of environmental science. Characterized as a group test, the instrument consisted of five concrete experiences related to environmental concepts, to which pencil-and-paper responses were made. The instrument was validated through (1) logical analysis of items from the standpoint of Piagetian theory, (2) correlation with clinical interviews and group test results in physical science, and (3) factor analysis. The results indicated an acceptable level of validity for the instrument in each category. Concurrently, the results of the study indicated that the reasoning level of the subjects was well below the theoretical levels predicted for them by theory. The results also suggested that reasoning ability in environmental science was lower than in areas associated with the physical concepts usually tested. The data suggested the presence of a horizontal decalage, or time lag, between the development of logical reasoning skills in areas of familiarity, such as physical science, and areas of content less familiar to the subject or those in which logical structures may be less frequently used in the development of evaluation instruments.     

Stereotyped Identification: How Identifying with Fictional Latina Characters Increases Acceptance and Stereotyping

This article applies the concept of stereotyped identification—the idea that cognitively and emotionally identifying with fictional minority characters can simultaneously increase acceptance of minorities while reinforcing stereotypes about how they look, act, and talk—to the context of Latina television characters. Specifically, we employed a national survey measuring participants’ exposure to Latina TV characters; levels of identification with TV characters; and attitudes toward, and stereotypes about, Latinas. Results are consistent with the prediction that through identification, exposure to Latina TV characters is related to more favorable feelings toward Latinas, as well as higher levels of stereotyped views of Latinas as sexualized and melodramatic.