Reproducibility of heart rate and rating of perceived exertion values obtained from different incremental treadmill tests

Objective The present study aimed to examine the reproducibility of heart rate (HR) and rating of perceived exertion (RPE) values obtained during different incremental treadmill tests. Equipment and methods Twenty male, recreational, endurance-trained runners (10-km running pace: 10–15 km·h−1) performed, in a counterbalanced order, three continuous incremental exercise tests with different speed increments (0.5 km·h−1, 1 km·h−1 and 2 km·h−1). Thereafter, each participant performed the three tests again, maintaining the same order as before. The reproducibility of the HR and RPE values were analyzed for all protocols during submaximal intensities (8, 10, 12, and 14 km·h−1). In addition, it was examined the reproducibility of maximal HR (HRmax) and peak RPE (RPEpeak). Results The variability of both the HR and RPE values showed a tendency to decrease over the stages during the incremental test and was not or slightly influenced by the incremental test design. The HR at 14 km·h−1 and HRmax presented the highest reproducibility (CV < 2%). In contrast, the submaximal RPE values showed higher variability indices (i.e., CV > 5.0%). In conclusion, the HR values were highly reproducible during the stages of the incremental test, in contrast to the RPE values that presented limited reproducibility.

Collaboration on social network sites: Amateurs, professionals and celebrities

Amateurs are found in arts, sports, or entertainment, where they are linked with professional counterparts and inspired by celebrities. Despite the growing number of CSCW studies in amateur and professional domains, little is known about how technologies facilitate collaboration between these groups. Drawing from a 1.5-year field study in the domain of bodybuilding, this paper describes the collaboration between and within amateurs, professionals, and celebrities on social network sites. Social network sites help individuals to improve their performance in competitions, extend their support network, and gain recognition for their achievements. The findings show that amateurs benefit the most from online collaboration, whereas collaboration shifts from social network sites to offline settings as individuals develop further in their professional careers. This shift from online to offline settings constitutes a novel finding, which extends previous work on social network sites that has looked at groups of amateurs and professionals in isolation. As a contribution to practice, we highlight design factors that address this shift to offline settings and foster collaboration between and within groups.

Troublesome Amateurs: Theatre, ethics and the labour of mimesis

Kear, A. 'Troublesome Amateurs: Theatre, ethics and the labour of mimesis', Performance Research (2005) 10 (1), 26-46 RAE2008

24/6/20, [Parc des Princes], jubilé Ellegaard [de gauche à droite les coureurs] Guignard, Contenet, Bouhours : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 59843

[24/6/20, Parc des Princes, jubilé Ellegaard, de gauche à droite les coureurs] Guignard, Contenet, Bouhours : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 59844

Parc des Princes, 27/6/20, [de gauche à droite, les coureurs de vitesse sur piste Lucien] Louet, Hans Ohrt, Peyrode : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 59860

Parc des Princes, 27/6/20, [de gauche à droite, les coureurs de vitesse sur piste] Peyrode, Hans Ohrt, Ernest Ohrt : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 59862

Journal des amateurs d'objets d'art et de curiosité

1875/07 (N7)-1875/12 (N12).

Parc des Princes, 27/6/20, [de gauche à droite, les coureurs de vitesse sur piste Lucien] Louet, Ernest Ohrt, [Pierre] Sergent : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 59861

[Stade Pershing, coureurs à pied de gauche à droite] Langrenay [Frédéric], Jeyer [i. e. Robert Geyer], Guillar : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 60249

Parc des Princes, 18/7/20, championnats de France de vitesse [cyclisme sur piste, de gauche à droite les coureurs] Pouchois, Schilles, Dupuy : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 60125

Régates amateurs en Angleterre, une fin de course dames [barques propulsées avec une perche] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 60439

Nouveau manuel complet du peintre-décorateur de théâtre : utile aux décorateurs, aux auteurs dramatiques, aux acteurs et aux amateurs de théâtre (2e éd.) / par Gustave Coquiot,... ; préf. de M. L. Jusseaume

Collection : Manuels-Roret

Anvers, Rudd [non visible sur l'image] gagne [la] finale du 400 m [des Jeux olympiques, seuls apparaissent les coureurs Ainsworth, Shea et Dafel, 20/8/20] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 60650

Anvers, course par équipe [4x100 m] US gagnant [avec les coureurs] Paddock, Scholz, Murchison, Kirksey [Jeux olympiques, 22/8/20] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 60699