Creatine co-ingestion with carbohydrate or cinnamon extract provides no added benefit to anaerobic performance

The insulin response following carbohydrate ingestion enhances creatine transport into muscle. Cinnamon extract is promoted to have insulin-like effects, therefore this study examined if creatine co-ingestion with carbohydrates or cinnamon extract improved anaerobic capacity, muscular strength, and muscular endurance. Active young males (n?=?25; 23.7?±?2.5?y) were stratified into 3 groups: (1) creatine only (CRE); (2) creatine+ 70?g carbohydrate (CHO); or (3) creatine+ 500?mg cinnamon extract (CIN), based on anaerobic capacity (peak power·kg^?1) and muscular strength at baseline. Three weeks of supplementation consisted of a 5?d loading phase (20?g/d) and a 16?d maintenance phase (5?g/d). Pre- and post-supplementation measures included a 30-s Wingate and a 30-s maximal running test (on a self-propelled treadmill) for anaerobic capacity. Muscular strength was measured as the one-repetition maximum 1-RM for chest, back, quadriceps, hamstrings, and leg press. Additional sets of the number of repetitions performed at 60% 1-RM until fatigue measured muscular endurance. All three groups significantly improved Wingate relative peak power (CRE: 15.4% P?=?.004; CHO: 14.6% P?=?.004; CIN: 15.7%, P?=?.003), and muscular strength for chest (CRE: 6.6% P?P?P?P?P?P?P?=?.013; CHO: 10.0% P?=?.007; CIN: 17.3% P?P?=?.021) and CIN (15.5%, P?相似文献   

Crossing the communication divide: Intergroup contact and the desire to learn the outgroup’s language

This paper explores the role of ethnolinguistic vitality and intergroup contact in changing attitudes and the interest to learn Hungarian among Slovak-speaking secondary school students in Southern Slovakia (N?=?225). Several indirect paths linking the all these variables were found. In general, lower local ethnolinguistic vitality of Hungarian decreased intergroup anxiety and increased the quality of contact with members of the Hungarian minority, which led to a more positive attitude toward the Hungarian minority, and enhanced the interest to learn Hungarian.     

For whom does “what works” work? The political economy of evidence-based education

ABSTRACT

What role does scientific evidence play in educational practice? Supporters of evidence-based education (EBE) see it as a powerful way of improving the quality of public services which is readily applicable to the education sector. Academic scholarship, however, points out important limits to this applicability. I offer an account inspired by Tullock’s theory of bureaucracy that helps explain EBE’s influence despite these limits. Recent configurations of EBE are an imperfect solution to 2 imperatives where policymakers are at an informational disadvantage: (a) guiding professionals working in the field and (b) evaluating evidence from academic researchers. EBE, especially in the form of RCTs and systematic reviews, offers a way of filtering a complex range of research to produce a determinate result that is transparent to policymakers. However, this impression of research transparency is misleading as it omits theoretical background that is critical for successfully interpreting the results of particular interventions. This comes at a cost of relevance to the frontline professionals whom this research evidence is supposed to inform and help.     

An evaluation of an electronic simulation of hearing impairment in the training of mainstream teachers

This paper describes an evaluation of a simple electronic simulation of sensorineural hearing loss intended to raise the awareness of mainstream trainee teachers during role play as both teacher and hearing-impaired pupil. In the wake of the continuing commitment to integration, it is hoped that such a device can improve the preparation of mainstream trainee teachers for their role as teachers of the hearing impaired. Twenty-four trainee teachers experienced both roles during the simulation, and their comments were scored by an expert panel for their importance. It was found that participants achieved a significant increase in awareness during their two five-minute simulated experiences of being a hearing pupil and teaching a hearing-impaired pupil. The experience of learning as a pupil with a simulated impairment was demonstrated to be as valuable as teaching a pupil with a simulated impairment, although there were differences with respect to the types of issues highlighted.