Mechanical work and efficiency of 5 + 5 m shuttle running.
Paola ZamparoGaspare PaveiFrancesca NardelloDavide BartoliniAndrea MonteAlberto E MinettiPublished in: European journal of applied physiology (2016)
W ext (+) is larger in SR than in CR (2.5 vs. 1.4 J kg(-1) m(-1) in the range of investigated speeds: 2-3.5 m s(-1)) and W int (+) , at fast speed, is about half of W tot (+) . eff(+) is lower in SR (16 %) than in CR (50-60 % at comparable speeds) and this can be attributed to a lower elastic energy reutilization due to the acceleration/deceleration phases over this short shuttle distance.