The effects of frequency of encouragement on performance during maximal exercise testing     

Joseph L. Andreacci  Linda M. Lemura  Steven L. Cohen  Ethan A. Urbansky  Sara A. Chelland  Serge P. von Duvillard 《Journal of sports sciences》2013,31(4):345-352

The aim of this study was to determine the effects of frequency of verbal encouragement during maximal exercise testing. Twenty-eight participants (12 males, 16 females) aged 20.9 - 1.5 years (mean - s ) performed a maximal exercise test ( V O 2max ) on a treadmill without any verbal encouragement. The participants were matched according to their pre-test V O 2max and placed into either a control group or one of three experimental groups. They performed a second exercise test (post-test) 1 week later. During the second test, the control group received no verbal encouragement; the 20 s (20E), 60 s (60E) and 180 s (180E) encouragement groups received verbal encouragement every 20, 60 and 180 s, respectively, beginning with stage 3 of the exercise test. Relative V O 2max , exercise time, blood lactate concentration, respiratory exchange ratio (RER) and ratings of perceived exertion (RPE) were not significantly different from the first test to the second test for the control group without verbal encouragement and the 180E group that received infrequent encouragement. Post-test values were significantly higher than pre-test values for the 20E and 60E groups. The post-test values of the 20E group were significantly higher than their pre-test values for relative V O 2max ( P ? 0.001), exercise time ( P ? 0.0001), blood lactate concentr . ation ( P ? 0.05), RER ( P ? 0.01) and RPE ( P ? 0.0001); this was also the case for the 60E group for relative V O 2max ( P ? 0.01), blood lactate concentration ( P ? 0.05), RER ( P ? 0.05) and RPE ( P ? 0.05). The results suggest that frequent verbal encouragement (every 20 s and 60 s in the present study) leads to significantly greater maximum effort in a treadmill test than when no encouragement is given or when the encouragement is infrequent (i.e. every 180 s).  相似文献   

Influence of recovery intensity on time spent at maximal oxygen uptake during an intermittent session in young,endurance-trained athletes     

Delphine Thevenet  Erwan Leclair  Magaly Tardieu-Berger  Serge Berthoin  Sophie Regueme  Jacques Prioux 《Journal of sports sciences》2013,31(12):1313-1321

Abstract

In this study, we examined the effects of three recovery intensities on time spent at a high percentage of maximal oxygen uptake (t90[Vdot]O_2max) during a short intermittent session. Eight endurance-trained male adolescents (16 ± 1 years) performed four field tests until exhaustion: a graded test to determine maximal oxygen uptake ([Vdot]O_2max; 57.4 ± 6.1 ml · min^?1 · kg^?1) and maximal aerobic velocity (17.9 ± 0.4 km · h^?1), and three intermittent exercises consisting of repeat 30-s runs at 105% of maximal aerobic velocity alternating with 30 s active recovery at 50% (IE₅₀), 67% (IE₆₇), and 84% (IE₈₄) of maximal aerobic velocity. In absolute values, mean t90[Vdot]O_2max was not significantly different between IE₅₀ and IE₆₇, but both values were significantly longer compared with IE₈₄. When expressed in relative values (as a percentage of time to exhaustion), mean t90[Vdot]O_2max was significantly higher during IE₆₇ than during IE₅₀. Our results show that both 50% and 67% of maximal aerobic velocity of active recovery induced extensive solicitation of the cardiorespiratory system. Our results suggest that the choice of recovery intensity depends on the exercise objective.  相似文献   

Fighting Prophecy with Naplam: “The Ballad of the Green Berets”     

R. Serge Denisoff 《Journal of American culture (Malden, Mass. : 2003)》1990,13(1):81-93

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The analysis of causal models: Some remarks on new techniques     

Serge Carlos 《Interchange》1970,1(3):21-29

The theme of this article is the convergence between sociological reflection and technical developments in quantitative analysis. The author shows how the use of techniques based upon the general model of regression forces further reflection on phenomena studied, each of the techniques presented implying postulates about the dynamics of the variables measured or about the influence of variables that are not measured. Taking ecological analysis and contextual analysis as a starting point, the author introduces path analysis showing a progression from the former to the latter models in the convergence between techniques and sociological reflection.  相似文献   

Supervisee Incompatibility and Its Influence on Triadic Supervision: An Examination of Doctoral Student Supervisors' Perspectives     

Serge F. Hein  Gerard Lawson  Christopher P. Rodriguez 《Counselor Education & Supervision》2011,50(6):422-436

A qualitative study was conducted to explore supervisors' experiences of supervisee incompatibility in triadic supervision. In‐depth interviews were completed with 9 doctoral student supervisors in a counselor education program, and a whole‐text analysis generated 3 categories. Supervisee incompatibility took a wide variety of forms and negatively affected the content of supervision, including its progress and productivity. It also negatively influenced the process of supervision, including the feedback and support offered by either the supervisor or the supervisees and the general atmosphere of supervision meetings. Implications of the findings for counseling supervision and for further research are also addressed.  相似文献   

La semantique politique du jeu de couleurs merinide: pureté et clarté, blancheur et verdeur (xiiie–xve siècles)     

Serge Gubert 《Al-Masaq: Islam & the Medieval Mediterranean》2017,29(1):13-40

This article highlights the establishment of political legitimacy of Marīnid Sultan authority (1265–1465) using their symbolic colours, white and green. In order to examine the significance of these colours, we use the available historical material so that we are able to interpret colour in the context of this legitimacy. We consider literature as presented in ?genres such as historiography, poetry and political and religious texts and demonstrated in the symbolic aspects of the new sultan's power within a ceremonial space. Marīnid scholars have studied such symbolic politics and have composed a ‘poetics of royalty’ – a metaphorical arrangement linking colours and emblems of royalty that are purified and regenerated. These are embodied in certain emblems: norias, water-clocks, white flags (or lanterns) indicating the hour of prayer and the sword of the caliphate as a shining light on the summit of the mosque in al-Qarawiyyīn. The arrangement of the colours has a political dimension developed by sultans and their scholars that demonstrates the legitimacy of a dynasty emerging from nowhere, heir to a missing imām, that of Idrissid, the founder of regenerated monarchy. Finally, the white colour of the Marīnids is a symbolic re-appropriation of the Almohad white. Tīnmal, ‘the one who belongs to the Whites, to the Pure’, also known as the White City (al-madīna al-bay?ā') – founded by the Marīnid sultans on what became the city of Fes.  相似文献   

Arlington building     

Louis J. Larson  Serge N. Petrenko 《Journal of The Franklin Institute》1923,196(1):109-111

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Skill-dependent proximal-to-distal sequence in team-handball throwing     

Wagner H  Pfusterschmied J  Von Duvillard SP  Müller E 《Journal of sports sciences》2012,30(1):21-29

The importance of proximal-to-distal sequencing in human performance throwing has been reported previously. However, a comprehensive comparison of the proximal-to-distal sequence in team-handball throwing in athletes with different training experience and competition is lacking. Therefore, the aim of the study was to compare the ball velocity and proximal-to-distal sequence in the team-handball standing throw with run-up of players of different skill (less experienced, experienced, and elite). Twenty-four male team-handball players (n = 8 for each group) performed five standing throws with run-up with maximal ball velocity and accuracy. Kinematics and ball trajectories were recorded with a Vicon motion capture system and joint movements were calculated. A specific proximal-to-distal sequence, where elbow flexion occurred before shoulder internal rotation, was found in all three groups. These results are in line with previous studies in team-handball. Furthermore, the results of the present study suggest that in the team-handball standing throw with run-up, increased playing experience is associated with an increase in ball velocity as well as a delayed start to trunk flexion.  相似文献   

A Model for Using Triadic Supervision in Counselor Preparation Programs     

Gerard Lawson  Serge F. Hein  Hildy Getz 《Counselor Education & Supervision》2009,48(4):257-270

The Council for Accreditation of Counseling and Related Educational Programs (2001) has approved the use of triadic supervision as an alternative to individual supervision in clinical instruction. However, literature describing this mode of supervision is very limited. A model for triadic supervision is described, including presession planning, in‐session strategies, and administrative considerations and supervisee evaluation. An evaluation of the model from 2 recent studies is also discussed, and recommendations are provided for using triadic supervision in counselor preparation.  相似文献   

A Quest for the Holy Grail in the New Millennium: In Search of a Unified Theory of Cognitive Development     

Sophie Parent  Sylvie Normandeau  & Serge Larivée 《Child development》2000,71(4):860-861

Our reply emphasizes the benefits of cooperation between researchers in developing a comprehensive model of cognitive development that considers the constraints of human brain structures and the interplay of general laws of development and individual differences in developmental pathways within the context of social and cultural environments.  相似文献