Assessment of muscle fatigue after an ultra-endurance triathlon using tensiomyography (TMG)

In this study, we used tensiomyography (TMG) to assess muscle status immediately after an ultra-endurance triathlon. Maximal radial displacement or deformation of the muscle belly, contraction time, delay time, sustain time, and relaxation time were measured for both legs, and dependent t-tests were used to compare means between the beginning and end of the race. The 19 men assessed (age 37.9 ± 7.1 years; height 177.5 ± 4.6 cm; weight: 73.6 ± 6.5 kg) participated in the 2009 edition of the Lanzarote Ironman. Deterioration in the neural response was observed for contraction time (P = 0.008) and relaxation time (P = 0.011), with a moderate decrease in the response time (sustain time) and a loss in muscle stiffness (deformation of the muscle belly). The effect of muscle fatigue on the rectus femoris and biceps femoris was different. Barely any changes in contraction time, relaxation time, sustain time, and deformation of the muscle belly were observed, while only the contraction response time decreased to a significant extent (reduction in delay time; P = 0.003). The considerable loss in contractile capacity induced by a long-distance race was reflected in changes in the neuromuscular response and fluctuations in the contractile capacity of the muscle. These modifications, derived from a prolonged, exhausting effort, can be assessed in a simple, non-aggressive, non-invasive way using tensiomyography.     

硬才是硬道理

如果不看麦迪的活塞队服,你还会以为这是他年轻时的飞扣照片。实际上NBA的摄影师们已经越来越难抓拍到麦迪这种舒展的动作了,你也几乎认不出来他原来打球的样子。说实话,麦迪本赛季的表现非常令我兴奋。原以为他的职业生涯会废掉,但麦迪反而越打越有味道。1月3日对爵士队的比赛,他甚至险些打出一个"三双"。麦迪现在脸上的笑容也越来越多了。     

老菜鸟 VS 小网虫

说来你也许不相信，我爷爷一大把年纪了，竟然是个不折不扣的铁杆电脑迷。 爷爷总喜欢异想天开。其他人退休了，都去打打麻将扑克呀，来个“新马泰”十日游呀，或是参加老年健身操什么的。可他呢，年过花甲了，脑门上花白的头发稀稀落落，快“—马平川”了，却一天到晚跟那台“联想1＋1”来个亲密接触，还常常拖腔拿调地吟唱辛弃疾的词：“老夫聊发少年狂”。瞧瞧，自鸣得意得很哩!     

多加一副筷子还是多做一盘菜？——闻5类41种“新”创意职位

新华网报道,2006年11月28日在上海国际创意产业活动周闭幕式上,上海市劳动和社会保障局推出了41个创意产业领域新职业,涉及会展广告、数码艺术、产品设计、时尚设计和环境艺术设计5大类。值此创意产业蓬勃兴起之时,上海此举颇为引人注目。职业这个东西,在国外不知如何,在我国却只是     

一张不舒服的床

一年的秋天,我来到皮卡迪的一座别墅与一帮朋友相聚．共度这个狩猎季节。     

英国中学生交际中的“小动作”

果果有幸作为学校的代表,到英国伦敦参加一个中英中学生交流活动。期间,果果不但领略到了雾都伦敦的风采,而且在和英国中学生的交流中发现了一些不为人注意的"小动作"。这些"小动作"流淌出来的情与     

论学习的研究范式与视界

影响人的学习的最重要因素是什么?不同的教学理论对此给出了大相径庭的答案,这是因为它们各自对学习本身持有不同的视界,有的看重预期的学习结果,有的聚焦影响学习过程的各种方法,还有一些则抓住了学习发生的条件.有八种对教育传播与技术领域的理论发展一直产生影响,并且仍在产生强烈影响的最流行研究范式,它们分别是完形心理学、行为主义和新行为主义、发展心理学、文化—历史学派、信息加工理论、认知符号理论、认知资源理论和社会建构主义.一般来说,研究总是在某个特定的范式框架内进行的,但是研究者应该认识到,范式本身会对研究方法和结果产生很深的影响.更重要的是,研究者应该对各种不同的理论与范式持开放的心态,因为新的发现总是出现在不同范式之间的交叠磨合处.     

中职英语教学的几点思考

我国中等职业教育的迅速发展对中职英语提出了更高的要求。目前,中职英语教学的现状是不容乐观,在教师、学生、教材等方面都存在一些问题。我们需要从这些问题入手,提出一些相应的对策来提高英语教学的效果。     

谭星信箱——谭星姐姐主持

回南方老家时，曾经看到一幅清新得让人心醉的画面。碧绿的枝条如丝绦垂挂在清澈的水面，风一吹，柳梢拂水，微波荡漾，那一圈圈涟漪便摇进心中最柔软的隐秘里去，嵌入细胞，嵌入血液，直至嵌入灵魂。     

Intergenerational transmission of social anxiety: the role of social referencing processes in infancy

Responses to an unfamiliar adult were examined in infants of mothers with social phobia ( N = 79) and infants of nonanxious comparison mothers ( N = 77) at 10 and 14 months in a social referencing paradigm. On each occasion, a female stranger first interacted with the mother and then approached and interacted with the infant. Over time, infants of mothers with social phobia showed increasing avoidance of the stranger, particularly when they were behaviorally inhibited. In boys, maternal social phobia was associated with increasing fearful responses. Infant avoidance was predicted by expressed maternal anxiety and low levels of encouragement to interact with the stranger. The findings are discussed in relation to theories concerning the intergenerational transmission of social anxiety.