当下武术“文化空间”生存路径论析

在如今纷繁复杂的文化环境中,传统武术文化环境受到威胁,武术“文化空间”正渐离大众视线,面临被现代化社会环境、生产方式所呑嘆的危机。因此,探索当下武术“文化空间”生存路径的意义重大且时间紧迫。为科学合理地保护传统武术文化,通过研究武术“文化空间”构建的具体方式,试图做好武术“文化空间”的复原、移植和开拓工作,让传统武术文化得以在现代化的新环境中如鱼得水。     

The effects of a calf pump device on second half performance of a simulated soccer match in competitive youth players

During soccer matches, performance decrements have been reported that relate to both physical abilities and technical skills. To investigate the effects of low-frequency electrical stimulation LFES (VeinoplusSport®, Ad Rem Technology, France) administered during half-time recovery on performance alterations during the second half. Twenty-two highly trained young players undertook a soccer-match simulation (SAFT⁹⁰). During half-time, they were randomly assigned to LFES group or Placebo group. Each half was split into 3 bouts of 12 minutes. Following each bout, maximal strike speed (MSS), sprint test (ST), maximal sprint accelerations (MA) and metabolic power (MP) were determined in both groups. Arterial (AF) and venous flows (VF) were measured at rest and at the end of half-time. LEFS group exhibited beneficial effects on performance compared to the Placebo group with a likely effect for MSS, ST, MA, and a possible effect for MP. AF and VF increased statistically more in LEFS group compared to Placebo group. The use of specific calf-pump LFES during half-time of a youth simulated soccer match attenuated the decrease in performance during the second half compared to Placebo group. This effect is most marked at the beginning of the second half with regards to explosive parameters.     

Evening electronic device use and sleep patterns in athletes

The present study aimed to investigate pre-sleep behaviours (including evening electronic device use) and sleep quantity in well-trained athletes. Seventy well-trained athletes (44 females, 26 males) aged 21 ± 4 y from a range of team and individual sports were asked to complete an online sleep diary for 7 days. The sleep diary included questions about pre-sleep behaviours (e.g. napping, caffeine intake), electronic device use in the 2 h prior to bedtime (e.g. type of device and duration of use) and sleep (e.g. time in bed, sleep onset latency). On average, athletes spent 8:20 ± 1:21 h in bed each night. Associations between age, time in bed and sleepiness suggested that younger athletes spent more time in bed (B = -0.05, p = 0.001) but felt sleepier (r = -0.32, p < 0.01) than older athletes. On average, athletes mostly used electronic devices for 0–30 min prior to sleep. The use of multiple devices in the evening was associated with more perceived difficulty in falling asleep (B = 0.22, p = 0.03), but no associations existed with other sleep variables. In summary, younger athletes may require later start times or improved sleep quality to resolve excessive sleepiness.     

从刻蚀电路板废液中制取硫酸铜的工艺研究

研究了以刻蚀电路板废液为原料制取硫酸铜的工艺条件。探讨了Fe3 的干扰,不同的pH以及不同浓度的NaOH和H2SO4对产品质量的影响。结果表明:采用15%~20%NaOH与20%H2SO4可使产品的回收率达92%,产品纯度可达98%。     

初探田径运动员过度疲劳的恢复训练

文章运用文献资料研究方法,论述了运动员出现过度疲劳后的征状,所应采取的恢复措施及所能达到的最佳恢复效果,以期为田径训练工作提供参考和帮助。     

竞技健美操运动员训练后的恢复手段

通过文献研究、调查访谈等研究方法,根据竞技健美操运动员的训练产生疲劳的特点,提出了有针对性的恢复手段,包括竞技健美操运动员生理和心理疲劳的恢复手段。以期为完善竞技健美操的训练、提高运动员的竞技能力以及增进运动员的身心健康提供有益的帮助。     

Sand training: Exercise-induced muscle damage and inflammatory responses to matched-intensity exercise

This study compared markers of muscle damage and inflammation elevated by a matched-intensity interval running session on soft sand and grass surfaces. In a counterbalanced, repeated-measures and crossover design, 10 well-trained female athletes completed 2 interval-based running sessions 1 week apart on either a grass or a sand surface. Exercise heart rate (HR) was fixed at 83–88% of HR maximum. Venous blood samples were collected pre-, post- and 24?h post-exercise, and analysed for myoglobin (Mb) and C-reactive protein (CRP). Perceptual ratings of exertion (RPE) and muscle soreness (DOMS) were recorded immediately post- and 24?h post-exercise. A significant time effect showed that Mb increased from pre- to post-exercise on grass (p?=?.008) but not on sand (p?=?.611). Furthermore, there was a greater relative increase in Mb on grass compared with that on sand (p?=?.026). No differences in CRP were reported between surfaces (p?>?.05). The HR, RPE and DOMS scores were not significantly different between conditions (p > .05). These results suggest that in response to a matched-intensity exercise bout, markers of post-exercise muscle damage may be reduced by running on softer ground surfaces. Such training strategy may be used to minimize musculoskeletal strain while still incurring an equivalent cardiovascular training stimulus.     

运动员运动性疲劳的综合评定及恢复

通过文献资料法,对运动员疲劳产生的原因、疲劳的综合判断和运动员疲劳的恢复进行了探讨,针对运动员运动性疲劳产生的原因,提出了运动员疲劳恢复的方法和手段。     

伤愈后刘翔比赛能力及全程技术特征分析

采用文献资料法、信息技术法、录像分析法、数理统计法等,对我国著名110m栏运动员刘翔伤愈后的比赛表现进行技术解析,与伤前洛桑站比赛的技术参数进行对照,找出刘翔伤愈后在技术和能力方面的优势与不足之处,旨在为刘翔伤愈后能够快速达到巅峰并再破世界记录提供参考。     

运动性疲劳与身体机能的恢复

一个世纪以来,运动性疲劳一直是体育科学研究中重要的课题,本文拟就运动性疲劳产生的机制、预防及恢复手段进行了论述,以期为运动性疲劳进行深入的研究提供有益的参考。