Long-term Tai Chi exercise increases body stability of the elderly during stair ascent under high and low illumination*     

Qipeng Song  Shen Wang  Del P. Wong  Jingyi Zhou  Wei Sun  Cui Zhang 《Sports biomechanics / International Society of Biomechanics in Sports》2018,17(3):402-413

The effects of long-term Tai Chi exercise on body stability of the elderly during stair ascent under high and low illumination were investigated. Forty-five healthy elderly women were divided into three groups, namely, Tai Chi exercise group, brisk walking group and no-exercise control group. All the participants ascended a staircase, during which force platforms and a motion capture system collected the data. Under the high illumination, Tai Chi exercise participants exhibited higher loading rate and anteroposterior centre of pressure (COP_ap) displacement as well as a lower braking impulse than no-exercise group. Under the low illumination, Tai Chi exercise participants demonstrated higher COP_ap and mediolateral centre of pressure (COP_ml) displacements as well as lower braking and lateral impulses compared with no-exercise participants. The centre of mass (COM)_ml sway in Tai Chi and no exercise participants were higher, the loading rates in Tai Chi and walking participants were higher, and the lateral impulse in no exercise participants was higher under low illumination than under high illumination. Thus, low illumination increases the risk of falling. Tai Chi participants increased their foot clearance, head inclination angle and COP_ap displacement under low illumination to increase their stability during stair ascent.  相似文献   

Post-activation potentiation (PAP) in endurance sports: A review     

Daniel Boullosa  Sebastian Del Rosso  David G. Behm  Carl Foster 《European Journal of Sport Science》2018,18(5):595-610

While there is strong support of the usefulness of post-activation potentiation (PAP) phenomenon in power demanding sports, the role that PAP could play in endurance sports has received less attention. The aim of this review is to present evidence for a better understanding of PAP in endurance athletes; and to discuss the physiological basis and methodological aspects necessary for better practices and designing further studies. A search for relevant articles on PAP and endurance trained athletes was carried out using Medline and ISI Web of Knowledge databases. Twenty-two studies were included in the review. The current evidence suggests the possible influence of PAP for performance enhancement after appropriate conditioning activities during warm up. Evaluation of PAP responses during testing, training and competition may be also important for athletes monitoring. There are many unresolved questions about the optimum load parameters for benefiting from PAP in both training and competition; and the role that PAP may exert for optimal performance while interacting with central and peripheral factors associated with muscle fatigue. Further studies should elucidate the association between PAP responses and long-term adaptations in endurance athletes.  相似文献   

Caffeine ingestion changes time-motion and technical-tactical aspects in simulated boxing matches: A randomized double-blind PLA-controlled crossover study     

Victor Silveira Coswig  Paulo Gentil  Francine Irigon  Fabrício Boscolo Del Vecchio 《European Journal of Sport Science》2018,18(7):975-983

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西班牙教育制度简介   总被引：2，自引：0，他引：2  

艾斯宾·卡门  高志怀 《河北师范大学学报(教育科学版)》2004,6(6):103-104

西班牙的学校可以是公立的,也可以是私立的。学校的经费来源于政府或者私人。西班牙的学制分为幼儿园、小学、中学教育和高中、大学、职业、成人、特殊教育。职业学校毕业的学生可以直接升大学,高中毕业的学生要参加高考。  相似文献   

The Bulletin Storytelling Review, Volume 1. Del Negro, Janice M., & Stevenson, Deborah (Eds.). Champaign, IL: University of Illinois, Graduate School of Library and Information Science, 1999: 99 pp. $14.95 (paperback). ISBN 0-87845-106-4.     

Del Negro  Janice M.  &#x; Stevenson  Deborah . 《Library & information science research》1999,21(4)

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Identification and Characterization of a Novel Plasmid-Encoded Laccase-Like Multicopper Oxidase from Ochrobactrum sp. BF15 Isolated from an On-Farm Bio-Purification System     

María Carla Martini  Francesca Berini  Luka Ausec  Carmine Casciello  Carolina Vacca  Mariano Pistorio  Antonio Lagares  Ines Mandic-Mulec  Flavia Marinelli  María Florencia Del Papa 《Food Technology and Biotechnology》2021,59(4):519

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