Acute effects of whole-body vibration on running gait in marathon runners

Abstract

The aim of this study was to investigate the effects of a single bout of whole-body vibration (WBV) on running gait. The running kinematic of sixteen male marathon runners was assessed on a treadmill at iso-efficiency speed after 10 min of WBV and SHAM (i.e. no WBV) conditions. A high-speed camera (210 Hz) was used for the video analysis and heart rate (HR) was also monitored. The following parameters were investigated: step length (SL), flight time (FT), step frequency (SF), contact time (CT), HR and the internal work (W_INT). Full-within one-way analysis of variance (ANOVA) of the randomised crossover design indicated that when compared to SHAM conditions, WBV decreased the SL and the FT by ~4% (P < 0.0001) and ~7.2% (P < 0.001), respectively, and increased the SF ~4% (P < 0.0001) while the CT was not changed. This effect occurred during the first minute of running: the SL decreased ~3.5% (P < 0.001) and SF increased ~3.3% (P < 0.001). During the second minute the SL decreased ~1.2% (P = 0.017) and the SF increased ~1.1% (P = 0.02). From the third minute onwards, there was a return to the pre-vibration condition. The W_INT was increased by ~4% (P < 0.0001) during the WBV condition. Ten minutes of WBV produced a significant alteration of the running kinematics during the first minutes post exposure. These results provide insights on the effects of WBV on the central components controlling muscle function.     

An empirical study on the relationships between knowledge management,knowledge-oriented human resource practices and innovation

The main purpose of this paper is to empirically analyse relationships between human resource (HR) and knowledge management (KM) practices and their effect on the firm’s innovation performance. From the knowledge-based view of the firm, hypotheses based on the specific interactions between an integrated set of KM and knowledge-oriented HR practices were established and statistically tested in a sample of 111 Spanish companies from technological industries. Survey methodology was used with the aim to gather data about KM practices and other related organizational aspects. Overall, this paper provides empirical evidence of a moderating effect of a set of knowledge-oriented HR practices in the relationship between KM exploitation practices and innovation performance. In line with previous research, we suggest that although KM practices are important in themselves for innovation purposes, when specific organizational conditions are properly established by managers the innovation capacity of the firm will significantly be improved and more successfully utilized.     

Editorial research and the publication process in biomedicine and health: Report from the Esteve Foundation Discussion Group,December 2012

Despite the fact that there are more than twenty thousand biomedical journals in the world, research into the work of editors and publication process in biomedical and health care journals is rare. In December 2012, the Esteve Foundation, a non-profit scientific institution that fosters progress in pharmacotherapy by means of scientific communication and discussion organized a discussion group of 7 editors and/or experts in peer review biomedical publishing. They presented findings of past editorial research, discussed the lack of competitive funding schemes and specialized journals for dissemination of editorial research, and reported on the great diversity of misconduct and conflict of interest policies, as well as adherence to reporting guidelines. Furthermore, they reported on the reluctance of editors to investigate allegations of misconduct or increase the level of data sharing in health research. In the end, they concluded that if editors are to remain gatekeepers of scientific knowledge they should reaffirm their focus on the integrity of the scientific record and completeness of the data they publish. Additionally, more research should be undertaken to understand why many journals are not adhering to editorial standards, and what obstacles editors face when engaging in editorial research.     

The effects of global knowledge reservoirs on the productivity of multinational enterprises: The role of international depth and breadth

This study rests upon the premise that differences in the productivity performance of multinational enterprises (MNEs) stem from variations in their ability to access and combine globally distributed knowledge reservoirs within one organization. Its contribution lies in demonstrating that this important source of variation is determined by (a) the idiosyncratic manner in which the MNE's network of subsidiaries is structured, (b) the international breadth and depth of this network and (c) its location choices in the global landscape. We find that when multinationals spread their operations across many geographical markets, they benefit from knowledge externalities more than when they concentrate their activities in few countries. We further show that the ability to exploit spatially distant knowledge depends not only on idiosyncrasies specific to the MNE, but also on exogenous forces associated with international variations in appropriability regimes and industry-specific technological opportunities. As our study considers how the subsidiaries of the MNE collectively influence the productivity of the entire group, it captures complementarities and synergies within the group, and deepens understanding of how MNE-specific and location bound factors jointly shape performance outcomes.     

Colonizing Bodies: Corporate Power and Biotechnology in Young Adult Science Fiction

The American cultural and political landscape has seen changes on the level of seismic shifts in the past four decades, thanks in part to the two very diverse fields of big business and biotechnology. Linking the two arenas together in the literary landscape is a growing body of young adult science fiction that envisions a future shaped profoundly by both. This paper surveys how the interplay between corporations and biotechnology is represented in this emerging body of work to explore diverse facets of a common theme: the biotechnical subjection of human matter to market force.     

Overuse wrist injuries in young athletes: What do sports physicians consider important signals and functional limitations?

This study’s objective was to collect items from experienced sports physicians, relating to the presence and severity of overuse wrist injuries in young athletes, for developing a measurement instrument for signals of overuse wrist injury. Seven Dutch elite sports physicians involved in guidance and treatment of young athletes in wrist-loading sports (gymnastics, tennis, judo, field hockey, volleyball and rowing) participated in a focus group. They discussed signals and limitations related to overuse wrist injuries in young athletes. Data were coded and categorised into signals and limitations with subcategories, using an inductive approach. Of the resulting 61 signals and limitations in nineteen (sub)categories, 20 were considered important, forming a comprehensive item set for identifying overuse wrist injury in young athletes. Signals such as pain, “click”, crepitations, swelling and limited range of motion were marked useful for early identification of overuse wrist injury. Limitations in movement and performance were considered indicative of severe overuse injury but less relevant for initial injury identification. The focus group provided 17 important signals and 3 important limitations indicative of overuse wrist injury. These provide the basis for a valid measurement instrument for identifying overuse wrist injury in young athletes, with equal emphasis on pain and on other symptoms.     

Framing inclusive innovation within the discourse of development: Insights from case studies in India

The concept of ‘inclusive innovation’ for development has become increasingly prominent in both academic and policy discourses, raising important questions as to how this is being framed. Results from case studies conducted in India suggest inclusive innovation to be interpretively flexible and contested. One case presents a grassroots framing emphasising social and political empowerment, rooted in community self-sufficiency, autonomy and traditional belief systems. In contrast, the other cases co-opt the language of inclusion to present a predominantly market-based framing, heavily emphasising market readiness and participation. This framing is transforming rural social practices (including the organisation of space and time, the meaning of production and the role of women), introducing the potential for market dependency.