Blade Runner (film)

Résumé

Blade Runner est un film de science-fiction américain réalisé par Ridley Scott et sorti en 1982. Son scénario s'inspire assez librement du roman Les androïdes rêvent-ils de moutons électriques ? de l'auteur Philip K. Dick, à qui le film est dédié. L'action du film se situe à Los Angeles en 2019 et met en scène Rick Deckard (interprété par Harrison Ford), un ancien policier qui reprend du service pour traquer un groupe de réplicants, des androïdes créés à l'image de l'Homme, menés par l'énigmatique Roy Batty (interprété par Rutger Hauer). Le développement du projet ainsi que le tournage du film sont difficiles. Les producteurs, peu satisfaits de la version du réalisateur, opèrent quelques changements, modifiant notamment la fin du film. À sa sortie, le film est un échec commercial aux États-Unis et est accueilli durement par la critique. Il remporte néanmoins trois BAFTA Awards ainsi que le prix Hugo et rencontre le succès dans le reste du monde. La notoriété du film s'améliore avec

Source officielle

https://fr.wikipedia.org/wiki/Blade_Runner_(film)

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Nowadays, choosing adequate running shoes is very difficult, due to the high number of different designs. Nevertheless, shoes have two main characteristics to fit runners' technique and morphology: drop and arch support. Retailers' advices are usually based on the visual assessment of the customer's running technique. Such method is subjective and requires an experimented examiner while objective methods require expensive material, such as 3D motion system and pressure insoles. Therefore, the aim of this study was to determine the accuracy of foot strike pattern and pronation assessment using video cameras, compared to a gold standard motion tracking system and pressure insoles. 34 subjects had to run at 8, 12 and 16 Km/h shod and 12 Km/h barefoot during 30 s trials on a treadmill. Agreement between foot strike pattern assessment methods was between 88% and 92%. For pronation, agreement on assessment methods was between 42% and 56%. The results obtained indicate a good accuracy on foot strike pattern assessment, and a high difficulty to determine pronation with enough accuracy. There is therefore a need to develop new tools for the assessment of runner's pronation.

2018

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Proximal tibia volumetric bone mineral density is correlated to the magnitude of local acceleration in male long distance runners

Kamiar Aminian, Bijan Najafi

Deriaz O, Najafi B, Ballabeni P, Crettenand A, Gobelet C, Aminian K, Rizzoli R, Gremion G. Proximal tibia volumetric bone mineral density is correlated to the magnitude of local acceleration in male long-distance runners. J Appl Physiol 108: 852-857, 2010. First published February 4, 2010; doi:10.1152/japplphysiol.00865.2009.-The beneficial effect of physical exercise on bone mineral density (BMD) is at least partly explained by the forces exerted directly on the bones. Male runners present generally higher BMD than sedentary individuals. We postulated that the proximal tibia BMD is related to the running distance, as well as to the magnitude of the shocks (while running) in male runners. A prospective study (three yearly measurements) included 81 healthy male subjects: 16 sedentary lean subjects, and 3 groups of runners (5-30 km/wk, n = 19; 30-50 km/wk, n = 29; 50-100 km/wk, n = 17). Several measurements were performed at the proximal tibia level: volumetric BMD (vBMD) and cortical index (CI), i.e., an index of cortical bone thickness and peak accelerations (an index of shocks during heel strike) while running (measured by a three-dimensional accelerometer). A general linear model assessed the prediction of vBMD or CI by 1) simple effects (running distance, peak accelerations, time); and 2) interactions (for instance, if vBMD prediction by peak acceleration depends on running distance). CI and vBMD 1) increase with running distance to reach a plateau over 30 km/wk; and 2) are positively associated with peak accelerations over 30 km/wk. Running may be associated with high peak accelerations to have beneficial effects on BMD. More important strains are needed to be associated with the same increase in BMD during running sessions of short duration than those of long duration. CI and vBMD are associated with the magnitude of the shocks during heel strike in runners.

2010

Chargement

Proximal tibia volumetric bone mineral density is correlated to the magnitude of local acceleration in male long distance runners

Kamiar Aminian, Bijan Najafi

2010