Perceived Environments and Physical Activity Among American Indian Adults Living in Oklahoma: The THRIVE Study.

Background: Obesity and chronic disease disproportionately affect American Indians (AI). Identifying barriers to physical activity (PA) may promote PA and healthier lifestyles.

Objective: To identify perceptions of the built environment and examine whether there is an association between environmental perceptions and self-reported PA in AI communities.

Dexamethasone acutely down-regulates genes involved in steroidogenesis in stallion testes.

In rodents, livestock and primate species, a single dose of the synthetic glucocorticoid dexamethasone acutely lowers testosterone biosynthesis. To determine the mechanism of decreased testosterone biosynthesis, stallions were treated with 0.1mg/kg dexamethasone 12h prior to castration.