Competitive breath-hold divers (BHD) employ glossopharyngeal insufflation (GI) to increase intrapulmonary oxygen stores and prevent the lungs from dangerous compressions at great depths. Glossopharyngeal insufflation is associated with inflation of the lungs beyond total lung capacity (TLC). It is currently unknown whether GI transiently over-distends the lungs or adversely affects lung elastic properties in the long-term. Resting lung function, ventilatory drive, muscle strength, and lung compliance were measured in eight BHD who performed GI since 5.5 (range 2-6) years on average, eight scuba divers, and eight control subjects. In five BHD subsequent measures of static lung compliance (Cstat) were obtained after 1 and 3 min following GI. Breath-hold divers had higher than predicted ventilatory flows and volumes and did not differ from control groups with regard to gas transfer, inspiratory muscle strength, and lung compliance. A blunted response to CO2 was obtained in BHD as compared to control groups. Upon GI there was an increase in mean vital capacity (VCGI) by 1.75 +/- 0.85 (SD) L compared to baseline (p < 0.001). In five BHD Cstat raised from 3.7 (range 2.9-6.8) L/kPa at baseline to 8.1 (range 3.4-21.2) L/kPa after maximal GI and thereafter gradually decreased to 5.6 (range 3.3-8.1) L/kPa after 1 min and 4.2 (range 2.7-6.6) L/kPa after 3 min (p < 0.01). We conclude that in experienced BHD there is a transient alteration in lung elastic recoil. Resting lung function did not reveal a pattern indicative of altered lung ventilatory or muscle function.

This editorial gives a short preface to the eSports industry and why this industry is unusual for media management researchthereby describing the eSports ecosystem based on the stakeholders involved, the fundamental characteristics, and the governing principles of the industry. Then the three papers in this special issue are introduced. These papers show the uniqueness of the eSports industry by enhancing the understanding of eSports in a media management context. Furthermore, the editorial is highlighting its potential contribution to the field in aspects like the changing role of the consumers having a stronger influence on the media process, moving from global to local, and online to offline or the changes in media engagement in a digital environment. The editorial concludes by stating the potential of researching eSports as a case for the path to digitize media management and, additionally, create sustainable business models in the digitized society.

No abstract

Breath-hold divers employ glossopharyngeal insufflation (GI) in order to prevent the lungs from compressing at great depth and to increase intrapulmonary oxygen stores, thus increasing breath-hold time.The presented case study shows the physiological data and dynamic magnetic resonance imaging (dMRI) findings of acute hyperinflation, deliberately induced by GI, in a breath-hold diver and discusses the current state of knowledge regarding the associated hazards of this unique competitive sport.Static and dynamic lung volumes and expiratory flows were within the normal range, with vital capacity and peak expiratory flow being higher than the predicted values. Airway resistance and diffusing capacity of the lung for carbon monoxide were normal. Static compliance was normal and increased five-fold with hyperinflation. dMRI revealed a preserved shape of the thorax and diaphragm with hyperinflation. A herniation of the lung beneath the sternum and enlargement of the costodiaphragmatic angle were additional findings during the GI manoeuvre. After expiration, complete resolution to baseline was demonstrated.Hyperinflation can be physiological and even protective under abnormal physical conditions in the sense of acute adaptation to deep breath-hold diving. Dynamic magnetic resonance imaging is adequate for visualisation of the sequence of the glossopharyngeal insufflation manoeuvre and the complete reversibility of deliberate hyperinflation.

Esports, or competitive video gaming competitions, bring together aspects of sports, business, leisure, technology, and digital media, appealing to academics across multiple disciplines. Yet, esports scholarship remains highly fragmented, with scholars operating within traditional academic silos and forgoing opportunities to build on esports’ interdisciplinary nature. The purpose of this integrative review is to synthesize esports scholarship from across disciplines, identify critical scholarly issues, and develop a pragmatic, interdisciplinary research agenda. We find that extant esports scholarship is categorized by literature seeking to conceptualize and legitimize esports via sport parallels, with a focus on the consumers and culture of esports. Scholarly issues include researchers examining esports in their respective academic silos, omitting opportunities to connect conceptually similar streams of literature. Overall, we synthesize esports scholarship, bridge chasms between disjointed streams of literature, and outline a pragmatic research agenda which could benefit from interdisciplinary inquiries based on a shared understanding of esports.