Carbohydrate supplementation maintains physical performance during short-term energy deficit despite reductions in exogenous glucose oxidation.

Exogenous glucose oxidation is reduced 55% during aerobic exercise after three days of complete starvation. Whether energy deficits more commonly experienced by athletes and military personnel similarly affect exogenous glucose oxidation and what impact this has on physical performance remains undetermined. This randomized, longitudinal parallel study aimed to assess the effects of varying magnitudes of energy deficit (DEF) on exogenous glucoseoxidation and physical performance compared to energy balance (BAL).

Dietary Intake and Diet Quality of Female and Male NCAA Division I Cross Country Runners from a Single University.

Background: Collegiate student-athletes have unique nutritional requirements to support their athletic performance and health. Few studies have comprehensively characterized the diets of National Collegiate Athletic Association (NCAA) Division I student-athletes.

Objectives: To characterize dietary intake and diet quality during a competitive season in female and male NCAA Division I cross country student-athletes from a single university.

Strenuous training combined with erythropoietin induces red cell volume expansion-mediated hypervolemia and alters systemic and skeletal muscle iron homeostasis.

Strenuous physical training increases total blood volume (BV) through expansion of plasma volume (PV) and red cell volume (RCV). In contrast, exogenous erythropoietin (EPO) treatment increases RCV but decreases PV, rendering BV stable or slightly decreased. This study aimed to determine the combined effects of strenuous training and EPO treatment on BV and markers of systemic and muscle iron homeostasis.

REDD1 deletion and treadmill running increase liver hepcidin and gluconeogenic enzymes in male mice.

The iron-regulatory hormone hepcidin is transcriptionally up-regulated by gluconeogenic signals. Recent evidence suggeststhat increases in circulating hepcidin may decrease dietary iron absorption following prolonged exercise, however evidence is limited on whether gluconeogenic signals contribute to post-exercise increases in hepcidin. Mice with genetic knockout of regulated in development and DNA response-1 (REDD1) display greater glycogen depletion following exercise, possibly indicating greater gluconeogenesis.

Mild to Moderate Food Deprivation Increases Hepcidin and Results in Hypoferremia and Tissue Iron Sequestration in Mice.

Background: Short-term starvation and severe food deprivation (FD) reduce dietary iron absorption and restricts iron to tissues, thereby limiting the amount of iron available for erythropoiesis. These effects may be mediated by increases in the iron regulatory hormone hepcidin; however, whether mild to moderate FD has similar effects on hepcidin and iron homeostasis is not known.

Objectives: To determine the effects of varying magnitudes and durations of FD on hepcidin and indicators of iron status in male and female mice.

A Prolonged Bout of Running Increases Hepcidin and Decreases Dietary Iron Absorption in Trained Female and Male Runners.

Background: Declines in iron status are frequently reported in those who regularly engage in strenuous physical activity. A possible reason is increases in the iron regulatory hormone hepcidin, which functions to inhibit dietary iron absorption and can be induced by the inflammatory cytokine interleukin-6 (IL-6).

Objectives: The current study aimed to determine the impact of a prolonged bout of running on hepcidin and dietary iron absorption in trained female and male runners.

Iron deficient diets modify the gut microbiome and reduce the severity of enteric infection in a mouse model of S. Typhimurium-induced enterocolitis.

Enteric infections are widespread in infants and children living in low-resource settings. Iron availability in the gastrointestinal tract may modify the gut microbiome and impact the incidence and severity of enteropathy. This study was designed to determine the effect of an iron-deplete compared to an iron-rich environment in the lower intestine on the gut microbiome, and whether iron availability in the lower intestine affects the host immune response and severity of enteric infection in young mice.

Behavioral repertoire assessment of Bengal tigers (Panthera tigris) with focus on thermoregulatory behavior.

The behavioral repertoire and environmental feature needs for thermoregulatory comfort have not been reported in the literature for large captive exotics. An observational study was done to investigate the behavioral repertoire of tigers via continuous observation, while focusing on thermoregulatory behavior, in order to examine behavioral and thermoregulatory needs of these animals, and inform microclimatic landscape design for thermal comfort. Nine Bengal tigers (n = 6 females, n = 3 males) were observed in June 2012, and behavior data were recorded every minute, while thermal images of each individual, wind speed, ambient temperature, and relative humidity were recorded every 15 min.

Latinos' perspectives and experiences with intimate partner violence.

This qualitative study, utilizing focus group interviews with community members and in-depth interviews with victims and perpetrators, explored Latinos' beliefs and perceptions of IPV in Oklahoma City, Oklahoma, as a basis for developing culturally appropriate intimate partner violence (IPV) services for this population. The findings from these interviews suggest that this community recognizes IPV as a problem and is aware of the multiple dimensions, potential causes, and negative consequences of IPV. In general, participants perceived family and neighbors as preferring to not get involved in situations of IPV.

Components of successful HIV/AIDS case management in Alaska Native villages.

Case management is a valuable support service for HIV/AIDS patients, but little is known about the elements of case management that contribute to success for Alaska Natives living in remote rural villages. This study used qualitative data from 18 key informants (social services/health workers, family members, and tribal leaders) to identify the elements of successful case management. Two major categories dominated the analysis.

Health risk-factors for gay American Indian and Alaska Native adolescent males.

Having multiple identities as a homosexual American Indian or Alaska Native adolescent male increases the likelihood for poorer health and diminished well-being. This study assessed the differences in self-perceived health status between gay adolescent males and their heterosexual counterparts. A national nonrepresentative sample of 5,602 Indian and Native adolescent males was surveyed about issues of sexual behavior, physical and sexual abuse, mental health status, substance use, attitudes about school, participation in violence, and access to health care.