Validity of the VmaxST portable metabolic measurement system

The aim of this study was to assess and compare the validity of the portable VmaxST telemetry metabolic measurement device with that of a standard measurement system (Vmax29). Thirty asymptomatic, moderately active males provided written, informed consent and completed two maximal graded treadmill exercise tests (Bruce) using the VmaxST and the Vmax29 metabolic measurement systems. Tests were performed in random order on separate days to obtain peak values for time to exhaustion, heart rate, systolic and diastolic blood pressure, oxygen consumption (VO2), carbon dioxide production (VCO2), ventilation (VE), and respiratory exchange ratio (RER). Multivariate analysis of variance revealed no significant main effect (P = 0.88) between the two systems across any variable, suggesting similar measurement capabilities between the two systems. Linear regression analyses revealed moderate to high coefficients of determination for VO2 (r2 = 0.99), VCO2 (r2 = 0.99), VE r2 = 0.99), and RER (r2 = 0.89). Furthermore, Bland-Altman analyses demonstrated that the VmaxST yielded similar values to the Vmax29, suggesting good agreement between the two systems. Agreement was confirmed when the differences between the methods resulted in a small range as identified by the 95% limits of agreement. Findings from the current study confirm that the VmaxST is a valid device for measuring metabolic and physiological variables during exercise within a controlled laboratory setting.     

Challenges for the millennium

Health sciences librarians will face many new challenges in the new millennium. Some we can predict and some we cannot. The Hospital Information Services columns will explore some of these challenges in this and subsequent issues.     

Internet Research: The Role of the Focus Group

LIS researchers have used the face-to-face focus group interview for many years. Other researchers have recently embraced a new rendition of the focus group—the online focus group. This article examines face-to-face and online focus group modes through a review of actual research experiences using the two approaches. Relevant literature is considered. Comparisons are then drawn as to similarities and contrasts in methodology, group dynamics, and group communication. Within this context, possible applications of the online focus group approach for library and information science researchers and practitioners can be considered. Rapid development of technology coupled with the face-to-face and the online focus group approaches may allow the creation and implementation of the hybrid version, the virtual focus group.     

The Road Oft Traveled: Collection Analysis and Development in a Modern Academic Law Library

While law students and faculty are content to research solely online, the librarians at Stetson University College of Law's Dolly & Homer Hand Law Library are actively involving every library department to analyze and develop both the print and digital collection. This case study will analyze the print to digital shift in academic law libraries and its effect on collection development. It will then describe the process of collection management at the Hand Law Library and how the entire library team is used to determine what is required of the collection to best serve our students, faculty, and the public.