Relationship between laboratory-measured variables and heart rate during an ultra-endurance triathlon

The aim of the present study was to examine the relationship between the performance heart rate during an ultra-endurance triathlon and the heart rate corresponding to several demarcation points measured during laboratory-based progressive cycle ergometry and treadmill running. Less than one month before an ultra-endurance triathlon, 21 well-trained ultra-endurance triathletes (mean +/- s: age 35 +/- 6 years, height 1.77 +/- 0.05 m, mass 74.0 +/- 6.9 kg, = 4.75 +/- 0.42 l x min(-1)) performed progressive exercise tests of cycle ergometry and treadmill running for the determination of peak oxygen uptake (VO2peak), heart rate corresponding to the first and second ventilatory thresholds, as well as the heart rate deflection point. Portable telemetry units recorded heart rate at 60 s increments throughout the ultra-endurance triathlon. Heart rate during the cycle and run phases of the ultra-endurance triathlon (148 +/- 9 and 143 +/- 13 beats x min(-1) respectively) were significantly (P < 0.05) less than the second ventilatory thresholds (160 +/- 13 and 165 +/- 14 beats x min(-1) respectively) and heart rate deflection points (170 +/- 13 and 179 +/- 9 beats x min(-1) respectively). However, mean heart rate during the cycle and run phases of the ultra-endurance triathlon were significantly related to (r = 0.76 and 0.66; P < 0.01), and not significantly different from, the first ventilatory thresholds (146 +/- 12 and 148 +/- 15 beats x min(-1) respectively). Furthermore, the difference between heart rate during the cycle phase of the ultra-endurance triathlon and heart rate at the first ventilatory threshold was related to marathon run time (r = 0.61; P < 0.01) and overall ultra-endurance triathlon time (r = 0.45; P < 0.05). The results suggest that triathletes perform the cycle and run phases of the ultra-endurance triathlon at an exercise intensity near their first ventilatory threshold.     

Providing Dental Current Awareness to Faculty and Residents

Providing a current awareness service to patrons has long been a concern of many health sciences librarians. Dental librarians have a unique challenge in providing current awareness to patrons as the literature has not always been available in a timely manner through traditional systems. This article will discuss the evolution of current awareness systems, the issues facing dental librarians with regard to providing dental current awareness, and how the Wilson Dental Library addressed those issues.     

Public Libraries,Political Speech,and the Possibility of a Commons

Public libraries are not only political institutions, they are enmeshed in the politics of society. This paper presents some of the more thoughtful conceptions of both conservative and liberal politics, to a specific end. That end is the suggestion that public libraries can act as commons within their communities. The intricacies of acting as commons are detailed here, along with some practical suggestions for realizing the goal of becoming a commons.     

Breaching ethics for the sake of a “good” interview

This essay presents a series of short stories – autoethnographic tales from the field – about my experiences as a female (qualitative) researcher studying humor in male-dominated workplaces in 2014. I conducted over thirty ethnographic interviews with professional hair stylists and barbers throughout Phoenix, Arizona and Sacramento, California to better understand the discursive processes by which humor is gendered in non-corporate organizations. While in the field, however, I encountered more than I bargained for. The study participants (male and female) openly engaged in humorous dialogue including: verbal critiques of my body/sexuality, sexual harassment, suggestive innuendos, physical touch, and outright heterosexist humor. After reflecting on my experiences, I realized how institutional resources (e.g. Institutional Review Board) and protocols function to protect research participants yet do little to ensure the safety, security, and/or comfort of researchers.     

Reading the Body on House,M.D.: Medical Surveillance as a Model of the Social

This article focuses on the representation of the body in House, M.D. and suggests its usefulness as a metaphor for the view of the social body on which the series relies. The body in House, M.D. is the central occupation of the narrative, and it is around the body that the paired oppositions certainty/doubt and body/speech occur. In House, confessional speech is a regime of false knowledge while the body is privileged as the foundation of true knowledge—the province of the expert interpreter of the body. Through an exploration of these paired oppositions in the show's representation of medical practice, the author explores the series' model of the social in which the visual mediation of bodies is privileged as social hermeneutic and the intensification of mutual surveillance is the means of authentic interaction.     

Day care and family dynamics

Twenty-one dual-earner families whose preschool-aged children entered day care before 6 months of age and 19 dual-earner families whose preschool-aged children entered day care during the second year of life filled out questionnaires on the nature of their children's caregiving environment; their perceptions of the effects of day care on parent-child interaction and children's development; their overall job satisfaction; social support networks; and personal well-being, marital stress, and companionship. Mothers and fathers reported high levels of satisfaction with the caregiving environment and the effects of day care. Parental perceptions of the effects of day care on parent-child interaction and children's development did not differ as a function of time of entry into day care. Parental perceptions of selected parent-child variables were associated with job satisfaction, social support, and the marital measures. Parental perceptions of parent-child interaction were related to their perceptions of the effects of day care on children's social and cognitive skills. Mothers and fathers differed in these perceptions. There was some support for a conceptual link between marital variables and children's functioning in day care.