Issue 3–4 of volume 2 of Sports Technology features eight articles in three categories, Expert Opinion, Review, and Research. The issue starts with Niegl's expert opinion on technology for bouldering and an interview with Kilian Fischhuber, the Bouldering World Cup champion of 2005, 2007, 2008, and 2009. This is followed by a review article by Subic et al. on sustainable design and the environmental impact of sports products, with a comprehensive analysis of tennis racquets, composite materials, and sports apparel textiles.
The research articles include an aerodynamic analysis of sports textiles by Chowdhury et al., the effects of temperature changes on snowboard stiffness by Clifton et al., the design of an instrumented bowling ball by Fuss, the mechanics of flight in ski jumping by Marques-Bruna and Grimshaw, the effects of gloves on wheelchair rugby skill performance by Lutgendorf et al., and a new device for skill assessment of tennis players by Ahmadi et al.
The image we have selected for the cover page of this issue shows the Austrian ski jumper Gregor Schlierenzauer flying over the Vikersundbakken in March 2009. He won this event, and subsequently, the Ski Flying World Cup 2008/2009. The cover figure thematically complements the article of Marques-Bruna and Grimshaw on the aerodynamics of ski jumping. Sports Technology successfully continues featuring top athletes on its cover page, after Oscar Pistorius on the cover of volume 1 (4–5), who won one gold and one bronze medal in the 2004 Summer Paralympic Games, two gold medals in the 2005 Paralympic World Cup, and three gold medals in the 2008 Summer Paralympic Games. Gregor Schlierenzauer won one gold medal in the ski jumping 2007 World Championships (team large hill), two gold medals in the ski flying 2008 World Championships (team and individual), and one gold and 1 silver medal in the ski jumping 2009 World Championships (team large hill and individual normal hill, respectively).