Biomechanical loading in the triple jump

The triple jump is a demanding field event in which a jumper must tolerate extremely high impact forces while maintaining high horizontal speed. The present study was designed to clarify the mechanical loading characteristics and the role of neuromuscular function in the triple jump. Seven national triple jumpers (4 males, 3 females) volunteered to perform 3-6 jumps. The mean best performances were 14.32 - 0.45 m and 11.90 - 0.28 m for males and females, respectively. The three longest triple jumps for each jumper were selected for final analysis. The mean contact times were 0.139 s (hop), 0.157 s (step) and 0.177 s (jump). The largest ground reaction forces were observed in the step (15.2 times body weight), while the highest peak pressures were recorded under the heel and forefoot. The plantar pressure of the lateral side of the forefoot was highly related to the length of the triple jump ( P ? 0.05-0.01). In addition, electromyograms of both legs suggested that mechanical loading places high demands on the neuromuscular system, as characterized by the high rate of activation in the pre-activity phase followed by high eccentric activity. Thus, the high activities of the gastrocnemius, vastus lateralis and hip extensor muscles seem to play an important role in preventing unnecessary yielding of the jumper during the braking phase.     

Acute neuromuscular and metabolic responses to combined strength and endurance loadings: the “order effect” in recreationally endurance trained runners

Abstract

The study examined the acute neuromuscular and metabolic responses and recovery (24 and 48 h) to combined strength and endurance sessions (SEs). Recreationally endurance trained men (n = 12) and women (n = 10) performed: endurance running followed immediately by a strength loading (combined endurance and strength session (ES)) and the reverse order (SE). Maximal strength (MVC), countermovement jump height (CMJ), and creatine kinase activity were measured pre-, mid-, post-loading and at 24 and 48 h of recovery. MVC and CMJ were decreased (P < 0.05) at post-ES and SE sessions in men. Only MVC decreased in ES and SE women (P < 0.05). During recovery, no order differences in MVC were observed between sessions in men, but MVC and CMJ remained decreased. During recovery in women, a delayed decrease in CMJ was observed in ES but not in SE (P < 0.01), while MVC returned to baseline at 24 h. Creatine kinase increased (P < 0.05) during both ES and SE and peaked in all groups at 24 h. The present combined ES and SE sessions induced greater neuromuscular fatigue at post in men than in women. The delayed fatigue response in ES women may be an order effect related to muscle damage.     

Assessing the basic skills of the highly educated in 21 OECD countries: an international benchmark study of graduates’ proficiency in literacy and numeracy using the PIAAC 2012 data

This study compares the literacy and numeracy proficiencies of higher education (HE) degree holders in 21 OECD countries based on primary analysis of the national data sets collected via the OECD’s Programme for the International Assessment of Adult Competencies (PIAAC) 2012 study. The differences in the graduates’ average literacy and numeracy proficiencies amongst the OECD countries are substantial. Depending on the country, a smaller or greater proportion of a young highly educated age group does not have sufficient skills in literacy or numeracy to cope with many of the everyday tasks requiring the use of that skill. The PIAAC study challenges existing evaluation practices of the effectiveness of HE in fostering individual skills and puts into perspective the attempts to lift national average skill levels by increasing the HE sector’s intake.     

The Relevance of Journalism

The media-saturated nature of everyday life is well acknowledged in current audience research, but the role of journalism for people living in this digitalised environment remains less clear. To provide a better understanding of the role of journalism and news in everyday life, this article states the case for combining two complementary analytical perspectives in cultural audience research that draw on the framework of practice theory. We need to focus on both interpersonal communication practices within social networks and on discursive practices and patterns of how people use the media. Empirically, this article draws on an extensive audience study conducted in Finland, whose findings provide a cause for moderate optimism regarding the sustaining relevance of journalism in people's everyday life in the digital era. Firstly, social networks—both offline and online—constitute a vital structure within which the output of journalism is rendered meaningful by users. Secondly, the discursive practices applied by the participants emphasise the importance of news as a central means of orientation to society and making sense of the political nature of the public world. However, much of this potential remains unknown to journalists because users' activities occur at a distance from journalism and political institutions, which poses a challenge to digital journalism.     

Quality assurance and its impact from higher education institutions’ perspectives: methodological approaches,experiences and expectations

This paper reports on methodological approaches, experiences and expectations referring to impact analysis of quality assurance from the perspective of three higher education institutions (students, teaching staff, quality managers) from Germany, Finland and Romania. The presentations of the three sample institutions focus on discussing the core characteristics of quality assurance procedures applied and their expected and observed impacts, and how intended and non-intended undesirable ones are measured. It turns out that all sample institutions have already some instruments and sub-procedures in place for impact analysis of quality assurance and all of them are striving for further improvement by applying internal and external quality assurance procedures and impact analyses. Finally, a closer look at the recently revised Standards and Guidelines for Quality Assurance in the European Higher Education Area shows that the European sample institutions are on their way towards coherent quality assurance policies, while there is also room left for further improvement and investigation (for example, in implementing systematic methodologies of impact evaluation and quality policies in general).     

Cardiopulmonary loading in motocross riding

The present study was designed to examine physiological responses during motocross riding. Nine Finnish A-level motocross riders performed a 15-min ride at a motocross track and a test of maximal oxygen uptake (VO2max) in the laboratory. Cardiopulmonary strain was measured continuously during the ride as well as in the VO2max test. During the ride, mean VO2 was 32 ml x kg(-1) x min(-1) (s = 4), which was 71% (s = 12) of maximum, while ventilation (V(E)) was 73% (s = 15) of its maximum. The relative VO2 and V(E) values during the riding correlated with successful riding performance (r = 0.80, P < 0.01 and r = 0.79, P < 0.01, respectively). Mean heart rate was maintained at 95% (s = 7) of its maximum. Mean blood lactate concentration was 5.0 mmol x l(-1) (s = 2.0) after the ride. A reduction of 16% (P < 0.001) in maximal isometric handgrip force was observed. In conclusion, motocross causes riders great physical stress. Both aerobic and anaerobic metabolism is required for the isometric and dynamic muscle actions experienced during a ride.     

Acclimatization to altitude and normoxic training improve 400-m running performance at sea level

To investigate the benefits of ‘living high and training low' on anaerobic performance at sea level, eight 400-m runners lived for 10 days in normobaric hypoxia in an altitude house (oxygen content = 15.8%) and trained outdoors in ambient normoxia at sea level. A maximal anaerobic running test and 400-m race were performed before and within 1 week of living in the altitude house to determine the maximum speed and the speeds at different submaximal blood lactate concentrations (3, 5, 7, 10 and 13 mmol· l-1) and 400-m race time. At the same time, ten 400-m runners lived and trained at sea level and were subjected to identical test procedures. Multivariate analysis of variance indicated that the altitude house group but not the sea-level group improved their 400-m race time during the experimental period (P ? 0.05). The speeds at blood lactate concentrations of 5–13 mmol· l-1 tended to increase in the altitude house group but the response was significant only at 5 and 7 mmol·l-1 (P ? 0.05). Furthermore, resting blood pH was increased in six of the eight altitude house athletes from 0.003 to 0.067 pH unit (P ? 0.05). The results of this study demonstrate improved 400-m performance after 10 days of living in normobaric hypoxia and training at sea level. Furthermore, the present study provides evidence that changes in the acid–base balance and lactate metabolism might be responsible for the improvement in sprint performance.     

The effect of using a mobile literacy game to improve literacy levels of grade one students in Zambian schools

This intervention study was conducted to document conditions under which a computer based literacy game (GraphoGame?) could enhance literacy skills of first grade students in an African city. The participants were first grade students from Government schools (N = 573). These students were randomly sampled into control (N = 314) and various intervention groups (N = 259). GraphoGame? was administered on cellphones to students at their schools under supervision. Each student in the study was assessed using a battery of locally developed cognitive tests that measured emergent literacy skills (Orthography test), decoding competence (Spelling test), vocabulary (Picture Vocabulary Test—PVT) and arithmetic (Zambia Achievement Test—ZAT). There was a positive effect of the game for the Spelling test—which closely targeted the skill GraphoGame? is designed to promote. The most effective intervention combined exposure of both the teachers and the students to the game. Initial letter knowledge was a good predictor of final letter knowledge on GraphoGame?.     

Can a collaborative network environment enhance essay-writing processes?

The aim of this study is to examine whether a computer-supported learning environment enhances essay writing by providing an opportunity to share drafts with fellow students and receive feedback from a draft version. Data for this study were provided by 25 law students who were enrolled in a course in legal history at the University of Helsinki in February 2001. Both the students and the teacher were interviewed. The interviews showed that the students' experiences of the essay-writing process were very positive. The teacher's experiences were in line with the students'. The results showed that the students seemed to divide into two groups concerning their experiences towards sharing written drafts with peers: those who were very enthusiastic and enjoyed the possibility to share drafts and those who, on the other hand, felt that the idea of sharing unfinished essays was too threatening for them and required too much openness. The results further showed that the active use of a computer-supported learning environment was related to good essay grades.     

Changing relations between education and work: on the mechanisms and outcomes of the educational system

This article analyses the mechanisms of a state-organized educational system as it functions between households and the labour market, regulating the passage of age cohorts from the home via school to the labour market. One question is what outcomes the educational system actually produces and what mechanisms are at work in the distribution of educational advantage. In terms of disadvantage, the paper assesses solutions for overcoming the skill gap and entrapment problems of post-industrial society by means of education. In addition to describing how the educational system worked in the conditions of a mature Nordic welfare state and an industrial society based on paid work, feasible ways of reorganizing education in the changing work conditions of an increasingly crisis-ridden post-industrial society are also sought.