1,720,977 research outputs found
Cardiac response to Nage no Kata in judo
Full text linkThe first world judo Kata competition was held in October
2007 in Tokyo, Japan. The Nage no Kata was developed in
1884 and 1885 at the Kodokan. by Jigoro Kano, the founder
of judo, who developed Kata to demonstrate the principles
of judo and to provide a type of training which emphasized
performing techniques under controlled setting. According to Kano, to fully develop judo skills, it is essential to
involve both Randori and Kata techniques [1]. Most highgrade Japanese judo teachers emphasize the importance of
Kata performance for judokas’ development, in particular
Nage no Kata [2].
Results of the study conducted by Canestri et al. [3] suggested that session-RPE and HR monitoring is a simple and
practical tool to quantify training loads in judo in different
conditions. To date, no studies have investigated on possible association between HR and RPE related to Nage no
Kata in judo athletes. Also, empirical evidence shows no
studies that have researched correlation between Tori and
Uke in any segment of judo performance. Thus, the aim of
this study was to analyse the changes in HR and RPE of male
and female judo athletes who performed Nage no Kata in a
competitive setting
The Effects of Stretching Exercise on Levels of Blood Glucose: A Systematic Review with Meta-Analysis
Full text linkBackground: Physical activity plays an important role in the management of blood glucose levels. However, compelling evidence exists only for aerobic and resistance training. In this review, we aimed to identify the potential effects of stretching exercises on blood glucose levels. Methods A systematic literature search was performed using the following databases: Scopus, NLM PubMed, and Web of Science. Studies regarding the effects of stretching exercise in humans on blood glucose or any related variable were included. Further inclusion criteria were: (1) original articles (published from database inception to October 2022), (2) applying stretching as a unique exercise modality, (3) having either longitudinal or acute interventions, (4) including healthy and pathological populations, and (5) having within each study a pre- and post-intervention measure. Quality assessment of the studies was conducted using the Downs and Black checklist. Results A total of 13 articles were included. The quality assessment revealed an overall moderate quality of the included records. Ten articles included patients with type 2 diabetes (T2D), whereas the remaining three included at-risk populations. A total of 731 people with a mean age of 56.7 +/- 6.1 years old were analysed. Fasting blood glucose, 2 h post-oral glucose uptake, post-stretching intervention blood glucose levels, and HbA1c were identified as variables related to blood glucose within the studies. After the stretching interventions, a significant reduction was observed in either blood glucose (ES = - 0.79; p = 0.0174) or HbA1c (ES = - 1.11; p = < 0.0001). Meta-analytic results highlighted greater effects in T2D patients (ES = - 1.15; p = 0.02) and for studies applying stretching as an exercise intervention (ES = - 1.27; p = 0.006) rather than considering stretching as a control exercise modality. Conclusion The results of this systematic review highlight the potential of stretching exercises to reduce blood glucose levels. In particular, if stretching is applied as a specific form of exercise intervention in patients with T2D greater effects are observed. However, further studies with more solid research designs are required, therefore, caution is needed before prescribing stretching as an exercise intervention for glycaemic management
Objectively evaluated physical activity among individuals following anterior cruciate ligament reconstruction: a systematic review and meta-analysis
Full text linkObjective To compare time spent in moderate-to-vigorous physical activity (MVPA) per week, MVPA per day, and steps per day between individuals that were subjected to the anterior cruciate ligament reconstruction (ACLR) and healthy control group. Design Systematic review and meta-analysis of observational studies. Data sources Web of Science, Scopus, and PubMed have been comprehensively searched to identify relevant investigations. Eligibility criteria for selecting studies An observational research that objectively evaluated physical activity among respondents with a history of ACLR. Results Of 302 records, a total of 12 studies fulfilled the eligibility criteria. Four hundred and forty-three participants underwent the ACLR, 153 men and 290 women. The mean time between anterior cruciate ligament (ACL) surgery and evaluation of analysed outcomes was 34.8 months. The main findings demonstrated that the ACLR group spent less time in weekly MVPA (standardised mean differences (SMD)=−0.43 (95% CI −0.66 to −0.20); mean = −55.86 min (95% CI −86.45 to −25.27); p=0.0003; τ2=0.00), in daily MVPA (SMD=−0.51 95% CI −0.76 to −0.26]; mean = −15.59 min (95% CI −22.93 to −8.25); p<0.0001; τ2=0.00), and they had fewer daily steps (SMD=−0.60 95% CI −0.90 to −0.30); mean = −1724.39 steps (95% CI −2552.27 to −896.50); p<0.0001; τ2=0.00) relative to their non-injured counterparts. Additionally, available investigations indicated that individuals with a history of ACLR participated in 316.8 min of MVPA per week, 67 min in MVPA per day, and 8337 steps per day. Conclusion Long-term after ACLR, participants undergoing ACL surgery were less physically active compared with their non-injured peers, and they did not satisfy recommendations regarding steps per day. PROSPERO registration number CRD42023431991
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Effects of velocity-based training versus percentage-based training programs on neuromuscular performances and markers of muscle damage in young males: a randomized controlled trial
Full text linkBACKGROUND: Available literature referring to the differences in the efficiency between velocity-based training (VBT) and percentage-based strength training (PBT) relating to the neuromuscular performances and markers of muscle damage in young males is quite scarce. Therefore, the goal of the current study was to investigate the differences between VBT and PBT programs in terms of their effects on absolute strength, explosive power, speed, and agility, as well as their influence on muscle damage as indicated by changes in biochemical markers following a 6-week resistance training programs. METHODS: The study included 42 young men, divided into two experimental groups, VBT (N.=17) and PBT (N.=15), and the control group (N.=10). Before and after the experimental treatments, the respondents performed the following tests: one-repetition maximum (1RM) in squat and bench press exercises for absolute strength, squat jump (SJ) and countermovement jump (CMJ) for explosiveness, 5m and 20m running for speed, and 505 test around both legs for agility. In addition, creatine kinase (CK) and creatine kinase isoenzyme (CK-MB) were evaluated as markers of muscle damage. RESULTS: The obtained results suggested statistically significant differences between analyzed groups in terms of absolute strength and explosiveness in favor of the VBT program. It is also indispensable to highlight that VBT group demonstrated greater enhancement than PBT group in the following tests: 1RM squat (Δ% 17.9 and Δ% 11.9, respectively), 1RM bench press (Δ% 13.5 and Δ% 6.96, respectively), SJ (Δ% 13.89 and Δ% 5.15, respectively), CMJ (Δ% 16.96 and Δ% 5.37, respectively). The levels of CK marker were substantially lower at the third measurement in the VBT group compared to the PBT intervention. CONCLUSIONS: VBT was more effective regarding the development of absolute and explosive strengths and elicited lower muscle damage compared to the PBT program
Rapid weight loss habits before a competition in sambo athletes
Full text linkBackground: Like other combat sports, sambo has competition rules that divide athletes into categories based on gender, age and weight. Athletes in combat sports often resort to rapid weight loss (RWL) methods to be more competitive in lower weight categories and gain an advantage against lighter, smaller and weaker competitors. The aim of this study was to examine the methodology implemented by two different sambo age categories, junior and senior athletes, in order to attain RWL. Methods: The sample consisted of 103 male sambo elite athletes (seniors/juniors: age 28.5 ± 4.3/18.9 ± 0.8; height (m): 1.7 ± 0.1/1.8 ± 0.1; weight (kg): 76.3 ± 17.8/74.4 ± 16.3; BMI (kg/m2): 25.0 ± 3.8/23.7 ± 3.9) who completed a survey on RWL. Results: Athletes reported losing a mean of 5 kg starting approximately 12 days before a competition. The most common methodology reported by senior and junior sambo athletes was gradually increasing dieting, followed by sauna and plastic suit training. Less common methods adopted were laxatives, diuretics, the use of diet pills and vomiting. There were significant group differences for sauna and diet pill ingestion. Coaches and parents are influential people in the lives of athletes concerning the weight loss strategy to be adopted. Conclusions: This study’s results unequivocally confirm the prevalent practice of RWL in both senior and junior sambo athletes. Although athletes prevalently chose “less harmful” methods, there is a need to inform parents and coaches of the risks and benefits of RWL
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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