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Danielsson, T., Carlsson, J., Schreyer, H., Ahnesjö, J., ten Siethoff, L., Ragnarsson, T., . . . Bergman, P. (2017). Blood biomarkers in male and female participants after an Ironman-distance triathlon. PLoS ONE, 12(6), 1-9, Article ID e0179324.
Open this publication in new window or tab >>Blood biomarkers in male and female participants after an Ironman-distance triathlon
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2017 (English)In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 12, no 6, p. 1-9, article id e0179324Article in journal (Refereed) Published
Abstract [en]

BACKGROUND: While overall physical activity is clearly associated with a better short-term and long-term health, prolonged strenuous physical activity may result in a rise in acute levels of blood-biomarkers used in clinical practice for diagnosis of various conditions or diseases. In this study, we explored the acute effects of a full Ironman-distance triathlon on biomarkers related to heart-, liver-, kidney- and skeletal muscle damage immediately post-race and after one week's rest. We also examined if sex, age, finishing time and body composition influenced the post-race values of the biomarkers.

METHODS: A sample of 30 subjects was recruited (50% women) to the study. The subjects were evaluated for body composition and blood samples were taken at three occasions, before the race (T1), immediately after (T2) and one week after the race (T3). Linear regression models were fitted to analyse the independent contribution of sex and finishing time controlled for weight, body fat percentage and age, on the biomarkers at the termination of the race (T2). Linear mixed models were fitted to examine if the biomarkers differed between the sexes over time (T1-T3).

RESULTS: Being male was a significant predictor of higher post-race (T2) levels of myoglobin, CK, and creatinine levels and body weight was negatively associated with myoglobin. In general, the models were unable to explain the variation of the dependent variables. In the linear mixed models, an interaction between time (T1-T3) and sex was seen for myoglobin and creatinine, in which women had a less pronounced response to the race.

CONCLUSION: Overall women appear to tolerate the effects of prolonged strenuous physical activity better than men as illustrated by their lower values of the biomarkers both post-race as well as during recovery.

National Category
Sport and Fitness Sciences
Research subject
Social Sciences, Sport Science
Identifiers
urn:nbn:se:lnu:diva-65765 (URN)10.1371/journal.pone.0179324 (DOI)28609447 (PubMedID)
Available from: 2017-06-22 Created: 2017-06-22 Last updated: 2017-11-29Bibliographically approved
Ahnesjö, J. & Bergman, P. (2016). Effects on white blood cells in senior citizens during post exercise recovery in three different environments (indoors, simulated outdoors and outdoors). In: : . Paper presented at European college of sport science "crossing borders through sport science" 6-9 July, Vienna, Austria.
Open this publication in new window or tab >>Effects on white blood cells in senior citizens during post exercise recovery in three different environments (indoors, simulated outdoors and outdoors)
2016 (English)Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

Introduction

Natural environments are known to promote health and may also provide extraordinary conditions for post exercise recovery (Kuo 2015). In the project Health Effects of Recreation Outdoors (HERO) we explore the hypothesis that post exercise recovery in natural environments may be reflected in white blood cell counts (WBC). In our study 50 seniors (age >65 years) performed moderate physical activity (20 min) followed by passive recovery (2h) in three different environments (indoors, simulated outdoors and “true” outdoors).

Method

The experimental setup was a randomized cross-over design, thus all test persons did all treatments in a randomized order. We sampled white blood cells (WBC-diff), which were used to detect and quantify inflammatory response.

Results

Our early findings provide some support for the hypothesis that environment may impose differences in recovery effectiveness. White blood cell count (WBC-diff) appears to differ between the treatments and there is a significant interaction between sampling time and recovery environment in the monocytes, suggesting that the monocyte numbers differ, not only between sampling times but also between environments. In addition, WBC also show that some of the test persons develop leukocytosis during exercise and that white blood cell levels decrease rapidly immediately post exercise to levels significantly lower than base line values.

Discussion

Our results suggest that moderate physical activity in senior citizens may result in acute leukocytosis (see e.g. Sand et. al. 2013) and that recovery effectiveness (e.g in monocyte response) may be dependent upon environmental factors. The clinical importance of our results are not fully understood but there has been suggested an “open window” immediately post exercise in which infection risk may be elevated (Pedersen & Toft 2000) and it is possible that recovery out of doors may reduce this risk.

References

Sand, K., L, Flatebo, K., Andersen, M., B., Maghazachi, A., A. (2013) World J Exp Med 20; 3(1): 11-20

Pedersen, B., K. & Toft, A., D. (2000) Br J Sports Med 34:246–251

Kuo, M. (2015) Frontiers in Psychology 6:1-8

National Category
Sport and Fitness Sciences
Research subject
Social Sciences, Sport Science
Identifiers
urn:nbn:se:lnu:diva-55643 (URN)
Conference
European college of sport science "crossing borders through sport science" 6-9 July, Vienna, Austria
Projects
HERO
Note

Project funded by:

The Kamprad Family Foundation for Entrepreneurship, Research and Charity

ref no 20132082

Available from: 2016-08-19 Created: 2016-08-19 Last updated: 2017-01-16Bibliographically approved
Fröberg, A., Alricsson, M. & Ahnesjö, J. (2014). Awareness of current recommendations and guidlines regarding strength training for youth. International Journal of Adolescent Medicine and Health, 26(4), 517-523
Open this publication in new window or tab >>Awareness of current recommendations and guidlines regarding strength training for youth
2014 (English)In: International Journal of Adolescent Medicine and Health, ISSN 0334-0139, E-ISSN 2191-0278, Vol. 26, no 4, p. 517-523Article in journal (Refereed) Published
Abstract [en]

Aim: Physical conditioning of youth has always been a controversial topic as it raises ethical, physiological, and medical issues. Current recommendations and guidelines suggest that strength training is a relatively safe and worthwhile method in conditioning youth. This, however, requires well-informed coaches who follow age-appropriate strength training recommendations and guidelines, compiles well-designed strength training programs, and provides qualified supervision and instructions. The purpose of this study was to investigate coaches’ awareness of current recommendations and guidelines regarding strength training for youth.

Method: A total of 39 football (US: soccer) coaches (34 males and 5 females) training boys in age groups 8–12 years were included in this study. Data were collected using an attitude statement questionnaire, and the assertions were based upon current recommendations and guidelines.

Results: The results revealed significant differences among coaches in terms of knowledge of important aspects of strength training for youth.

Conclusions: The results suggested that coaches in the present study were not aware of the latest recommendations and guidelines regarding strength training for youth.

National Category
Sport and Fitness Sciences
Research subject
Social Sciences, Sport Science
Identifiers
urn:nbn:se:lnu:diva-32632 (URN)10.1515/ijamh-2013-0329 (DOI)2-s2.0-84925225607 (Scopus ID)
Available from: 2014-03-05 Created: 2014-03-05 Last updated: 2017-12-05Bibliographically approved
Bergman, P., Andersson, M., Tugetam, Å. & Ahnesjö, J. (2013). Physical activity and its influence on monitoring of physical activity. In: : . Paper presented at 4th Conference of HEPA Europe.
Open this publication in new window or tab >>Physical activity and its influence on monitoring of physical activity
2013 (English)Conference paper, Poster (with or without abstract) (Other academic)
National Category
Sport and Fitness Sciences
Research subject
Sport Science
Identifiers
urn:nbn:se:lnu:diva-30008 (URN)
Conference
4th Conference of HEPA Europe
Available from: 2013-10-28 Created: 2013-10-28 Last updated: 2017-02-16Bibliographically approved
Ahnesjö, J. & Danielsson, T. (2013). Recreational fishing in an educational intervention context promotes awareness and knowledge about nature in schoolchildren. In: : . Paper presented at EOE Network, European Institute for Outdoor Adventure Education and experiential Learning. Stockholm 2013.
Open this publication in new window or tab >>Recreational fishing in an educational intervention context promotes awareness and knowledge about nature in schoolchildren
2013 (English)Conference paper, Oral presentation with published abstract (Other academic)
Abstract [en]

Outdoor activities may be intuitively associated with interest for nature and environmental concern. However, most scientific studies suggest that no such correlation exists. In this quantitative study we have used a questionnaire and explored the hypothesis that a one day educational intervention may be a successful tool in increasing environmental awareness, interest for nature and interest for recreational fishing. We present evidence suggesting that educational interventions in which young people are exposed to natural environments in a recreational fishing context have positive effects on interest for nature and recreational fishing, knowledge about nature and environmental awareness. Our findings also reveal that frequency of nature visits does not correlate with self estimated interest for nature.  We also show that the observed effects of the educational intervention “Klassdraget” appear to be larger for the girls which are, by tradition, less interested in recreational fishing as compared to boys.

National Category
Sport and Fitness Sciences
Research subject
Sport Science
Identifiers
urn:nbn:se:lnu:diva-30167 (URN)
Conference
EOE Network, European Institute for Outdoor Adventure Education and experiential Learning. Stockholm 2013
Available from: 2013-11-07 Created: 2013-11-07 Last updated: 2017-01-16Bibliographically approved
Fröberg, A., Ahnesjö, J. & Alricsson, M. (2011). Ledare tveksamma tillstyrketräningsråd för barn. Svensk Idrottsforskning: Organ för Centrum för Idrottsforskning (4), 47-50
Open this publication in new window or tab >>Ledare tveksamma tillstyrketräningsråd för barn
2011 (Swedish)In: Svensk Idrottsforskning: Organ för Centrum för Idrottsforskning, ISSN 1103-4629, no 4, p. 47-50Article in journal (Other academic) Published
Abstract [sv]

I Sverige har vi haft en försiktig hållning till styrketräning för barn.År 2009 kom Riksidrottsförbundet med rekommendationer som imotsats till tidigare tydligt förespråkar styrketräning. I en pilotstudievisar vi bland annat att fotbollsledare från olika divisioner trots detär oeniga om vad som egentligen är det rätta.

Place, publisher, year, edition, pages
Stockholm: Centrum för idrottsforskning (CIF), 2011
National Category
Sport and Fitness Sciences
Research subject
Social Sciences, Sport Science
Identifiers
urn:nbn:se:lnu:diva-47577 (URN)
Available from: 2014-01-23 Created: 2015-11-25 Last updated: 2017-12-01Bibliographically approved
Forsman, A., Ahnesjö, J., Caesar, S. & Karlsson, M. (2008). A model of ecological and evolutionary consequences of color polymorphism. Ecology, 89, 34-40
Open this publication in new window or tab >>A model of ecological and evolutionary consequences of color polymorphism
2008 (English)In: Ecology, ISSN 0012-9658, E-ISSN 1939-9170, Vol. 89, p. 34-40Article in journal (Refereed) Published
National Category
Natural Sciences
Research subject
Natural Science; Natural Science, Evolutionary Biology
Identifiers
urn:nbn:se:lnu:diva-1612 (URN)
Available from: 2010-04-06 Created: 2010-04-06 Last updated: 2017-12-12Bibliographically approved
Karlsson, M., Caesar, S., Forsman, A. & Ahnesjö, J. (2008). Dynamics of colour polymorphism in a changing environment: Fire melanism and then what?. Oecologia, 154(4), 715-724
Open this publication in new window or tab >>Dynamics of colour polymorphism in a changing environment: Fire melanism and then what?
2008 (English)In: Oecologia, ISSN 0029-8549, E-ISSN 1432-1939, Vol. 154, no 4, p. 715-724Article in journal (Refereed) Published
National Category
Biological Sciences
Research subject
Natural Science, Evolutionary Biology
Identifiers
urn:nbn:se:hik:diva-2445 (URN)
Available from: 2010-01-22 Created: 2010-01-20 Last updated: 2017-12-12Bibliographically approved
Forsman, A., Ahnesjö, J. & Caesar, S. (2007). Fitness benefits of diverse offspring in pygmy grasshoppers. Evolutionary Ecology Research, 9(8), 1305-1318
Open this publication in new window or tab >>Fitness benefits of diverse offspring in pygmy grasshoppers
2007 (English)In: Evolutionary Ecology Research, Vol. 9, no 8, p. 1305-1318Article in journal (Refereed) Published
Abstract [en]

Question: Do females obtain fitness benefits from an increase in offspring diversity?Hypotheses: Polyandry increases offspring diversity within a clutch. Increased offspring diversity will reduce competition among siblings (manifested as increased mean survival in more diverse families) and the probability that all offspring might be ill-suited to future conditions (manifested as lower variance in survival in diverse families).Organisms: Pygmy grasshoppers, Tetrix subulata and Tetrix: undulata, that are polymorphic for colour pattern.Field site: South-central Sweden.Methods: We varied the number of mates provided to colour polymorphic pygmy grasshoppers. We reared families in either warm or cold conditions using a split-brood design.Conclusions: The colour morph diversity of broods increased with the number of experimentally provided mates. Colour morphs represent alternative strategies that differ in body size, physiology, behaviour, and life history. Survival increased with increasing sibling diversity, supporting the hypothesis that different morphs avoid competition by using different subsets of available resources. Homogeneous families (in which all siblings belong to the same or only a few colour morphs) varied more in survival than did families with diverse siblings, supporting the hypothesis that morphs vary in their ability to cope with and utilize different resources.

National Category
Developmental Biology
Research subject
Natural Science; Natural Science, Evolutionary Biology
Identifiers
urn:nbn:se:lnu:diva-2329 (URN)
Available from: 2010-04-07 Created: 2010-04-07 Last updated: 2017-01-16Bibliographically approved
Caesar, S., Ahnesjö, J. & Forsman, A. (2007). Testing the role of co-adapted genes versus bet hedging for mating strategies in colour polymorphic pygmy grasshoppers. Biological Journal of the Linnean Society, 90, 491-499
Open this publication in new window or tab >>Testing the role of co-adapted genes versus bet hedging for mating strategies in colour polymorphic pygmy grasshoppers
2007 (English)In: Biological Journal of the Linnean Society, ISSN 0024-4066, E-ISSN 1095-8312, Vol. 90, p. 491-499Article in journal (Refereed) Published
National Category
Natural Sciences
Research subject
Natural Science, Evolutionary Biology
Identifiers
urn:nbn:se:lnu:diva-2265 (URN)10.1111/j.1095-8312.2007.00739.x (DOI)
Available from: 2010-04-07 Created: 2010-04-07 Last updated: 2017-12-12Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-8684-608X

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