There is something about Mary… and Ted! : Training in mixed-sex groups makes you work harder. A study about the effort when training with the opposite sex.

In many sport associations, regardless of level, women and men rarely practice together. Previous studies indicate that work groups are generally more efficient when there is an even distribution between the sexes. Could that also be the case in sports? This study aims to investigate whether the sex composition of a training group affects the effort and performance of the participants. Eleven volunteers participated in the crossover study consisting of three different 150-meter sprint conditions; individually, single-sex group and mixed-sex group. Sprint times, heart rate and RPE were recorded during all three trials. The result of this study suggests that there might be practical benefits in regards to physical performance and effort to exercise in a training group consisting of both sexes instead of training only with the same-sex or individually. The understanding could be useful in areas such as; training optimisation for both athletes and in patient- and rehabilitation groups, increasing efficiency in work environments, in schools and sports clubs striving for both athletic success and gender equality.

Åldersblandning i skolan : elevers erfarenheter

Mixing ages in school classes became more and more common during the last dec-ades of the 20th century. From being a way to organise classes out of necessity they have now come to be something which is implemented on the basis of pedagogical arguments. The aim of this research has been to improve our knowledge of classes where pupils are not of the same age. A study of the pupils’ perspectives has been my main interest. (Age) homogeneous class can been looked upon as a result of the authorities’ deci-sion to have a fixed age for children to start school and their decision that certain courses should be completed within a defined period of time. Terms and the data concerning heterogeneous age groupings are ambiguous and cannot be fully understood without knowledge of national and sometimes even local contexts. Practices within age heterogeneous classes may differ greatly. A great deal of individual work takes place in age heterogeneous classes. Whether the class is non-mixed or mixed-aged does not seem to have a major im-pact on cognitive or non-cognitive abilities among the pupils, but there are suggestions that age heterogeneous classes might be disadvantageous to pupils in problematic situations. I am able to show that more than 30% of pupils in grades 1-3, close to 25% in grades 4-5, about 15% in grade 6 and a couple of percent of Swedish pupils in the later school years are taught in mixed-age groups. My own empirical research focuses on pupils’ experiences. My investigation has a ‘life-world’ oriented approach inspired by phenomenology. Pupils in grades 5 and 6 from three schools in three different socio-economic settings were interviewed. These pupils had experienced both mixed-age and single-age classes. The life-world of pupils seems to be something different from that encompassed by the philosophy about the advantages of mixing the ages in classes. Pupils find it diffi-cult to maintain or create relationships when only a few pupils of the same sex, who have started school at the same time, can be together in a class for a long time. Be-cause of the importance of social relationships almost every pupil in this investigation wished to be in a single-age class during the following year. It is the importance of common experiences rather than age that is central. Pupils stated that having things in common to study in their everyday schoolwork makes it easier to communicate and contributes to stable friendships. In my conclusion I focus on what it means to have relationships and how these are important for human identity. I also try to show how relationships are important in learning situations at school and for pupils’ opportunities to expand their knowledge.

The influence of sex, age, and race experience on pacing profiles during the 90 km Vasaloppet ski race

The purpose of this study was to investigate pacing-profile differences during the 90 km Vasaloppet ski race related to the categories of sex, age, and race experience. Skiing times from eight sections (S1 to S8) were analyzed. For each of the three categories, 400 pairs of skiers were matched to have a finish time within 60 seconds, the same start group, and an assignment to the same group for the other two categories. Paired-samples Student’s t-tests were used to investigate sectional pacing-profile differences between the subgroups. Results showed that males skied faster in S2 (P=0.0042), S3 (P=0.0049), S4 (P=0.010), and S1–S4 (P<0.001), whereas females skied faster in S6 (P<0.001), S7 (P<0.001), S8 (P=0.0088), and S5–S8 (P<0.001). For the age category, old subjects (40 to 59 years) skied faster than young subjects (19 to 39 years) in S3 (P=0.0029), and for the other sections, there were no differences. Experienced subjects (≥4 Vasaloppet ski race completions) skied faster in S1 (P<0.001) and S1–S4 (P=0.0054); inexperienced skiers (<4 Vasaloppet ski race completions) had a shorter mean skiing time in S5–S8 (P=0.0063). In conclusion, females had a more even pacing profile than that of males with the same finish time, start group, age, and race experience. No clear age-related pacing-profile difference was identified for the matched subgroups. Moreover, experienced skiers skied faster in the first half whereas inexperienced skiers had higher skiing speeds during the second half of the race.