Hematological Changes Elicited by Prolonged Intermittent Aerobic Exercise

Abstract

The purpose of this study was to compare the acute and chronic effects of a strenuous work task, in a moderately high heat stress environment, upon selected hematological components. Twenty experienced long-distance runners competed in a 24-hr relay, running approximately one mile each hour in relay fashion. Food and fluid intake was allowed ad libitum during rest intervals. Blood samples were secured three times: (T1) within 1 hr prior to the start; (T2) approximately 10 min after the first mile run; and (T3) approximately 10 min after each subject completed his last mile run. Main blood variables of interest were Hb, Hct, total protein, albumin, WBC diff, Na⁺, K⁺, Cl^?, Ca⁺⁺, glucose, cholesterol, T-bilirubin, LDH, SGOT, CPK, BUN, uric acid, and creatinine. Within the limitations of this study, the following main conclusions appear warranted: (a) hemoconcentration changes between T1 and T2 may be the causative factor underlying the moderate, but significant, increases in the majority of other hematological components between T1 and T2. As hemoconcentration did not appear to increase further between T2 and T3, component changes between T2 and T3 may be due to other causative factors; (b) the data from LDH, CPK, SGOT, BUN, uric acid and bilirubin is suggestive of muscle tissue damage and hemolysis.     

Family Turbulence and Child Internalizing and Externalizing Behaviors: Moderation of Effects by Race

This study examined the impact of residential instability and family structure transitions on the development of internalizing and externalizing problems from age 2 through 10.5. Child's race was examined as a moderator. Caregiver reports of internalizing and externalizing behaviors were obtained on 665 children at ages 5 and 10.5. Early-childhood residential and family structure transitions predicted elevated internalizing and externalizing problems at ages 5 and 10.5, but only for Caucasian children. These findings suggest that residential and family structure instability during early childhood independently contribute to children's later emotional and behavioral development, but vary as a function of the child's race. Community organizations (e.g., Women, Infant, and Children) can connect turbulent families with resources to attenuate effects of residential and family structure instability.     

Not a one-shot deal: Generative professional development among experienced teachers

This study examines two experienced teachers’ transformations and sense of agency as they implemented a writer’s workshop curriculum with multi-lingual third grade students. Multiple lines of inquiry guide the study including communities of practice (Lave & Wenger, 1991), teacher identities in figured worlds (Holland, Lachicotte, Skinner, & Cain, 1998), and the ethic of care (Noddings, 1984/2003). A constant comparative method was used to analyze classroom observation notes, interviews and debriefing sessions (Glaser & Strauss, 1967). Findings indicate that teachers transformed their pedagogical practices around writing, and at the same time reconsidered what it may mean to become renewed professionals.     

A paradox of sport management and physical activity interventions

Managers of sports programs, facilities, and organizations can have a role in promoting health through physical activity participation. From the perspective of a leisure scientist who has examined various dimensions of leisure-time physical activity, this paper aims to appraise the status of how sports as potential physical activity interventions have been examined, particularly in the sport management literature. Although the purpose of many sport management organizations is to encourage spectatorship, sports have always offered significant opportunities for children and adults to be more physically active. Sports are a motivator for physical activity because they are enjoyable to participants. Therefore, research done by academics in sports management could reflect more about how mass participation recreational sports can serve as interventions to promote healthy physical activity behavior for individuals and within communities.     

Cultural consultation: Implications for hispanic mental health services in the United States

The need to maximize the influence of the limited number of Hispanic mental health professionals in the United States requires the development of new roles. One possible role is that of cultural consultant to non-Hispanic providers. Cultural consultation can serve to help mental health providers differentiate between cultural differences and cognitive, affective and social deficits. This article will operationalize the concept and goats of cultural consultation, issues related to non- Hispanic staff providing services to Hispanics will be outlined, and a series of recommendations will be presented to assist individuals and organizations in developing cultural consultation programs.