Search results for "Verre"

Association of military training with oxidative stress and overreaching.

2011

ABSTRACT: We hypothesized that increased oxidative stress and disrupted redox balance may be predisposing factors and markers for overreaching (OR). Purpose: The study's purpose was to examine whether oxidative stress markers and antioxidant status and physical fitness are related to OR during an 8-wk military basic training (BT) period. Methods: Oxidative stress and antioxidant status were evaluated in the beginning and after 4 and 7 wk of training in 35 males (age = 19.7 ± 0.3 yr) at rest and immediately after a 45-min submaximal exercise. Physical activity (PA) was monitored by an accelerometer throughout BT. Indicators of OR were also examined. Results: From baseline to week 4, increase…

Validity of the Acute Recovery and Stress Scale: Training Monitoring of the German Junior National Field Hockey Team

2015

The aim of the present study was to examine the sensitivity of the Acute Recovery and Stress Scale (ARSS). This new psychometric questionnaire was developed to assess the physical, mental, emotional, and overall recovery and stress states of athletes. During a five-day field hockey training camp of the German Junior National Field Hockey Team ( n = 25) the ARSS was administered every morning and evening. The study indicated swift reactions of the scores of the physical and general factors as well as stability of scores for the emotional factors in accordance with the training schedule. The straining effect of the camp was best reflected by the adaptations of the scales Physical Performance…

2019

Objective: In two independent study arms, we determine the effects of strength training (ST) and high-intensity interval training (HIIT) overload on cardiac autonomic modulation by measuring heart rate (HR) and vagal heart rate variability (HRV). Methods: In the study, 37 well-trained athletes (ST: 7 female, 12 male; HIIT: 9 female, 9 male) were subjected to orthostatic tests (HR and HRV recordings) each day during a 4-day baseline period, a 6-day overload microcycle, and a 4-day recovery period. Discipline-specific performance was assessed before and 1 and 4 days after training. Results: Following ST overload, supine HR, and vagal HRV (Ln RMSSD) were clearly increased and decreased (small …

Effects of 10 weeks of military training on neuromuscular function in non-overreached and overreached conscripts

2019

The purpose of the study was to examine how military training influences neuromuscular function in non-overreached and overreached conscripts. A total of 24 male conscripts participated in the study (8 weeks basic training + 2 weeks specialized training). All measurements were conducted during weeks 1, 5, 8 and 10. After the training period, non-overreached (NOR, n = 16) and overreached (OR, n = 8) groups were compared. Isometric maximal forces (bench press, elbow flexion and knee extension), single twitch (plantar flexors), H-reflex, M-wave (Hmax/Mmax) and V-wave (V/Mmax) (soleus) were measured. In knee extension, force production increased in NOR by 22.5 ± 20.5% (p  0.05). In OR, plantarf…

Heart Rate Variability Monitoring During Strength and High-Intensity Interval Training Overload Microcycles

2019

Objective: In two independent study arms, we determine the effects of strength training (ST) and high-intensity interval training (HIIT) overload on cardiac autonomic modulation by measuring heart rate (HR) and vagal heart rate variability (HRV). Methods: In the study, 37 well-trained athletes (ST: 7 female, 12 male; HIIT: 9 female, 9 male) were subjected to orthostatic tests (HR and HRV recordings) each day during a 4-day baseline period, a 6-day overload microcycle, and a 4-day recovery period. Discipline-specific performance was assessed before and 1 and 4 days after training. Results: Following ST overload, supine HR, and vagal HRV (Ln RMSSD) were clearly increased and decreased (small …

Rhéologie et déformation du verre dans des conditions extrêmes

2018

Hardness measurements performed at room temperature have proven that glass can flow under elevated pressure. During industrial glass production processes, the actual distribution of stress components in the glass during scribing remains, to date, poorly quantified, and thus continues to be challenging to model numerically. To better quantify the viscous contribution to the rheology of glass, the effect of pressure on the viscosity and structural relaxation of glass, needs to be quantified experimentally by in situ deformation measurements.In this thesis, I performed experiments and models to study: (i) the volumetric relaxation of glass after high-pressure treatment above the glass transiti…

La verrerie médiévale issue des fouilles du chœur de l'ancienne abbatiale Saint-Pierre de Baume-les-Messieurs (Jura)

2013

National audience; Dans le cadre du Programme Collectif de Recherche sur Les monastères en Europe occidentale (Ve-Xe siècle). Topographie et structures des premiers établissements en Franche-Comté et en Bourgogne, codirigé par Sébastien Bully et Christian Sapin (UMR ARTeHIS 6298, Cnrs), l'ancienne abbatiale Saint-Pierre à Baume-les-Messieurs (Jura) a fait l'objet d'une fouille programmée de novembre 2011 à janvier 2012. Suite à une série de campagnes d'archéologie du bâti, de sondages et de prospections géophysiques engagés depuis 2007, la question des origines du monastère et de la nature des occupations antérieures à l'église romane a motivé l'ouverture d'une fouille dans le chœur de l'éd…

Lomme, rue du Grand But (Nord) : rapport de diagnostic

2010

Le projet d'aménagement a occasionné un diagnostic archéologique sur une surface avoisinant les 7 hectares. Au sein des 173 structures relevées au cours de cette opération, deux occupations se distinguent : une première datée des débuts du second âge du Fer (La Tène ancienne) et une seconde datée du IIe s. de notre ère. La plus ancienne a été identifiée par la présence de mobilier piègé dans des trous de poteau. Si la nature domestique de cette occupation est avérée, son extension sur l'emprise diagnostiquée reste problèmatique à définir. L'habitat rural gallo-romain a laissé une empreinte sur la quasi totalité de la parcelle. Les éléments significatifs se concentrent sur une surface de 2 h…

Les Hommes noirs, Une verrerie dreyfusarde d'Émile Gallé (1899-1900)

2014

International audience