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Surfboard paddling is an essential activity when surfing. Research investigating surfboard paddling, especially as it pertains to neuromechanical control and techniques used, is limited. Previous research made use of swim ergometers to examine surfboard paddling demands. The validity of using swim ergometers in surfboard paddling research and training deserves further analysis. To establish ecologically valid findings, researchers have begun to use swim flumes and still-water paddling environments to investigate paddling efficiency and technique. This emerging body of research has reported that muscle activation patterns, intensities, and timings differ as surfers move through different paddle stroke phases. A deeper understanding of paddling's neuromechanical control may help enhance the understanding of how to improve paddle performance and perhaps reduce injury risk. Therefore, the purpose of this review was to identify the gaps in the existing literature to help identify future research directions in relation to surfboard paddling techniques and neuromechanical control. [ABSTRACT FROM AUTHOR]

Surfboard manufacturing has begun to utilise Expanded Polystyrene as a core material; however, surf literature relatively ignores this material. This manuscript investigates the mechanical behaviour of Expanded Polystyrene (EPS) sandwich composites. An epoxy resin matrix was used to manufacture ten sandwich-structured composite panels with varying fabric reinforcements (carbon fibre, glass fibre, PET) and two foam densities. The flexural, shear, fracture, and tensile properties were subsequently compared. Under common flexural loading, all composites failed via compression of the core, which is known in surfing terms as creasing. However, crack propagation tests indicated a sudden brittle failure in the E-glass and carbon fibre facings and progressive plastic deformation for the recycled polyethylene terephthalate facings. Testing showed that higher foam density increased the flex and fracture mechanical properties of composites. Overall, the plain weave carbon fibre presented the highest strength composite facing, while the single layer of E-glass was the lowest strength composite. Interestingly, the double-bias weave carbon fibre with a lower-density foam core presented similar stiffness behaviour to standard E-glass surfboard materials. The double-biased carbon also improved the flexural strength (+17%), material toughness (+107%), and fracture toughness (+156%) of the composite compared to E-glass. These findings indicate surfboard manufacturers can utilise this carbon weave pattern to produce surfboards with equal flex behaviour, lower weight and improved resistance to damage in regular loading. [ABSTRACT FROM AUTHOR]

Surfboard manufacturing has begun to utilise Expanded Polystyrene as a core material; however, surf literature relatively ignores this material. This manuscript investigates the mechanical behaviour of Expanded Polystyrene (EPS) sandwich composites. An epoxy resin matrix was used to manufacture ten sandwich-structured composite panels with varying fabric reinforcements (carbon fibre, glass fibre, PET) and two foam densities. The flexural, shear, fracture, and tensile properties were subsequently compared. Under common flexural loading, all composites failed via compression of the core, which is known in surfing terms as creasing. However, crack propagation tests indicated a sudden brittle failure in the E-glass and carbon fibre facings and progressive plastic deformation for the recycled polyethylene terephthalate facings. Testing showed that higher foam density increased the flex and fracture mechanical properties of composites. Overall, the plain weave carbon fibre presented the highest strength composite facing, while the single layer of E-glass was the lowest strength composite. Interestingly, the double-bias weave carbon fibre with a lower-density foam core presented similar stiffness behaviour to standard E-glass surfboard materials. The double-biased carbon also improved the flexural strength (+17%), material toughness (+107%), and fracture toughness (+156%) of the composite compared to E-glass. These findings indicate surfboard manufacturers can utilise this carbon weave pattern to produce surfboards with equal flex behaviour, lower weight and improved resistance to damage in regular loading.

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Featured Application: This study builds on the fundamental understanding of surfboard fin design. This research identifies quantitative performance differences between the fin parameters used by surfers. These results aim to help both fin designers and surfers tailor fin choices to specific surfing styles/waves. Surfing is a popular sport, with the associated market forecast to reach 2.6 billion US dollars by 2027. In the published literature, there is a range of investigations into the performance of surfboard fins. Some studies model a single fin or review the performance of different fin layouts and surface designs. However, the effects of individual fin design features on flow dynamics are not well understood. This study provides numerical analysis into the thruster fin aspects (rake, depth, and base length) and resultant key performance indicators (i) lift and drag coefficients, and (ii) turbulent kinetic energy. The models were simulated in Ansys Fluent R19.1, solving steady Reynolds-averaged Navier–Stokes equations using the SST k−ω turbulence model at a velocity of 7 m/s. The results indicate the performance of fins varies more post-stall. The variations in rake showed the biggest impact on the turbulence intensity at an angle ≥20°. The variations in base length exhibited coefficient trends with greater lift at small angles but significant lift losses at high angles of attack. The variations in depth affected the forces on the fins rather than the performance indicators. Based on these simulations, a proposed fin set was developed that presented the lowest lift losses after the stall point. [ABSTRACT FROM AUTHOR]

Copyright of Facta Universitatis: Series Physical Education & Sport is the property of Facta Universitatis, Series Physical Education & Sport and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Novice surfers are at risk for a rare but potentially devastating form of atraumatic myelopathy. There are 16 published studies on this condition, including 66 cases. The most common suggested mechanism of injury is static hyperextension. However, active mechanisms, in contrast to static, have also been proposed and may be contributory. First time surfers, defined as those who have never been on a surfboard prior to the day of injury, are at particular risk. These individuals make up 89.5%-100% of the reported novice surfers found in the various reports. Multiple neurologic deficits occur and often include paraparesis, paraplegia, urinary retention, and hyperesthesia. While these deficits resolve in some cases, there are reports of multiple instances of permanent injury. Increased awareness of this condition is arguably the most effective preventative measure, as it may lead to avoidance of the predisposing postures. It may also lead to earlier diagnosis in the acute setting, which will become relevant as treatment modalities continue to be refined. [ABSTRACT FROM AUTHOR]

Coastal populations and hazards are escalating simultaneously, leading to an increased importance of coastal ocean observations. Many well-established observational techniques are expensive, require complex technical training, and offer little to no public engagement. Smartfin, an oceanographic sensor–equipped surfboard fin and citizen science program, was designed to alleviate these issues. Smartfins are typically used by surfers and paddlers in surf zone and nearshore regions where they can help fill gaps between other observational assets. Smartfin user groups can provide data-rich time-series in confined regions. Smartfin comprises temperature, motion, and wet/dry sensing, GPS location, and cellular data transmission capabilities for the near-real-time monitoring of coastal physics and environmental parameters. Smartfin's temperature sensor has an accuracy of 0.05 °C relative to a calibrated Sea-Bird temperature sensor. Data products for quantifying ocean physics from the motion sensor and additional sensors for water quality monitoring are in development. Over 300 Smartfins have been distributed around the world and have been in use for up to five years. The technology has been proven to be a useful scientific research tool in the coastal ocean—especially for observing spatiotemporal variability, validating remotely sensed data, and characterizing surface water depth profiles when combined with other tools—and the project has yielded promising results in terms of formal and informal education and community engagement in coastal health issues with broad international reach. In this article, we describe the technology, the citizen science project design, and the results in terms of natural and social science analyses. We also discuss progress toward our outreach, education, and scientific goals. [Display omitted] • Smartfin is an IoT, oceanographic sensor-equipped surfboard fin for citizen science. • Over 300 Smartfins have been distributed since 2016. • Roughly 2800 h of coastal data have been collected by participants. • Smartfin data are useful for coastal physics and remote sensing analyses. • Education, outreach, and community are central to project's mission. [ABSTRACT FROM AUTHOR]

This paper contributes to an emerging postcolonial literature on the history of surfing by documenting the material cultural practice of surfboard making across Hawai‘i, California and Australia. It outlines what is known of precolonial surfboard-making practices in Hawai‘i and then traces important 20th-century advances in design. In contrast to popular histories of surfing that emphasise Hawaiian ‘tradition’ versus Californian and Australian ‘innovators’, this paper establishes the links, exchanges and information flows that informed evolving practices of surfboard making. Such links, exchanges and information flows were trans-Pacific in nature, even from the early 20th century, and were utterly dependent on both Hawaiian antecedents and contemporary innovations. Although not without contestation, the emergence of surfboard making as a 20th-century trans-Pacific cultural industry was premised on generosity, a sense of artisan brotherhood and an omnipresent thirst in distant corners of the Pacific Ocean for a better way to ride its waves. [ABSTRACT FROM PUBLISHER]

Surfboard riding is a popular sport worldwide. Although surfing is considered a 'safe' pastime, significant injuries do occur, particularly to the head and cervical spine. Spinal injuries most commonly occur when the surfer's head strikes the seafloor. This case series identifies the spectrum of spinal pathologies sustained whilst surfing and their imaging appearances. No similar study has previously been published. [ABSTRACT FROM AUTHOR]

This article reads transcripts of interviews conducted with longboarders to advance a fresh understanding of localism. Conventionally, historians and sociologists have framed localism around the practices, motives and experiences of surfers who ride shortboards. This approach tends to silence the voice of other groups of surfers, including longboarders. Drawing on ideas from cultural geography, this article explores the motivations and experiences of longboarders who are largely marginalised within shortboard surfing culture. In this study we are interested in the bodily affects of longboarding, which gives meaning to individual lived experiences of riding waves. Bodily affects are understood as performative emotions that enable people to know and shape relationships with other human body-selves, as well as non-human entities. Bodily affects are expressed through narratives of “the vibe” and “the glide”, and the emotions include shame, fear and joy. While some longboarders confirmed the exclusionary and often violent behaviours associated with localism, there were also participants advocating for a more sociable approach to riding waves. [ABSTRACT FROM AUTHOR]

This article argues that the foundation story of Australian surfing history, the claim that Hawaiian swimming champion Duke Paoa Kahanamoku introduced surfboard riding in 1914-15, is a myth-understood not as an outright falsehood but as an accentuation of one version of the past over others for culturally determined reasons. Overlooked in the exaggerated emphasis on Kahanamoku's contribution is prior surfboard riding in Sydney. This article examines new evidence of Australian surfing history, reassesses Kahanamoku's contribution, and analyses the myth as a cultural discourse reflecting its cultural appeal and articulation with Kahanamoku's strong social memory. [ABSTRACT FROM AUTHOR]

The mechanics of the surf skimmer, fun sport at the beach, is re-examined by using fundamental fluid mechanics. Comparison of the existing theories and consideration of the effects previously neglected lead to the conclusion: Edge's model is physically incorrect; Tuck and Dixon's theory provides physical insights into the surf skimming; there are several trade-offs in the mechanics of the surf skimmer and these make this sport fun and challenging. [ABSTRACT FROM AUTHOR]