lnu.sePublications
Change search
Link to record
Permanent link

Direct link
BETA
Publications (10 of 71) Show all publications
Bergman, P. (2018). Dags att omvärdera stillasittandet.
Open this publication in new window or tab >>Dags att omvärdera stillasittandet
2018 (Swedish)Other (Other (popular science, discussion, etc.))
National Category
Public Health, Global Health, Social Medicine and Epidemiology
Identifiers
urn:nbn:se:lnu:diva-77024 (URN)
Available from: 2018-07-29 Created: 2018-07-29 Last updated: 2018-07-29
Carlsson, J., Danielsson, T., Bergman, P. & Schreyer, H. (2018). ECHOCARDIOGRAPHIC FINDINGS AND CARDIAC BIOMARKERS IN NON-ELITE TRIATHLETES – DATA FROM THE KALMAR IRONWOMAN STUDY. In: : . Paper presented at 23rd annual congress of the European College of Sport Science.
Open this publication in new window or tab >>ECHOCARDIOGRAPHIC FINDINGS AND CARDIAC BIOMARKERS IN NON-ELITE TRIATHLETES – DATA FROM THE KALMAR IRONWOMAN STUDY
2018 (English)Conference paper, Oral presentation with published abstract (Refereed)
National Category
Cardiac and Cardiovascular Systems
Identifiers
urn:nbn:se:lnu:diva-77240 (URN)
Conference
23rd annual congress of the European College of Sport Science
Available from: 2018-08-23 Created: 2018-08-23 Last updated: 2018-08-23
Ahnesjö, J. & Bergman, P. (2018). OUTDOOR EXERCISE IS MORE EFFICIENT THAN INDOOR EXERCISE IN SENIOR CITIZENS. PHYSIOLOGICAL EVIDENCE FROM THE HERO PROJECT. In: : . Paper presented at European college of sport science, July 2018, Dublin.
Open this publication in new window or tab >>OUTDOOR EXERCISE IS MORE EFFICIENT THAN INDOOR EXERCISE IN SENIOR CITIZENS. PHYSIOLOGICAL EVIDENCE FROM THE HERO PROJECT
2018 (English)Conference paper, Poster (with or without abstract) (Refereed)
Abstract [en]

INTRODUCTION:IntroductionPhysical exercise has been proven beneficial for health in all ages. In elderly, physical exercise, may contribute to prolonged life with maintained high quality and less costs associated with health care for society. In this study we explore if exercise out of doors may provide extra benefits as compared to exercise indoors and we measure power output, lactate levels and perceived effort in 49 senior citizens performing 20 minutes of moderate physical activity.METHODS:MethodThe HERO project is a randomized cross-over experiment with three different treatments <indoors, simulated="" outdoors="" and="">. The study sample consisted of 49 healthy senior citizens. They performed 20 minutes moderate intensity physical activity on an ergometer bike in all three conditions. Before immediately after and at minutes 10, 20, 30, 60 and 120 we sampled blood lactate. Power output was computed at 7 occasions during the 20 minutes of cycling, as was the rating of perceived exertion . Data was analyzed using mixed linear models. RESULTS:ResultsOur findings show that there were no differences between the two indoor treatments in any of the measured variables. In the outdoor treatment, however, there were significant effects on blood lactate levels and power output but not in perceived exertion, suggesting that exercise out of doors makes the test person more efficient although the experience of effort stay unaffected.CONCLUSION:Discussion/conclusionsOur results support the notion that the outdoors may provide extraordinary conditions for exercise, not only because it appear to results in more exercise/effort, the outdoors is also an “arena” with high availability and most often totally for free. Previous results from the HERO project also suggests that white blood cell counts are affected by the outdoor treatment, something that may be related to the observed increased power output herein

National Category
Health Sciences
Identifiers
urn:nbn:se:lnu:diva-77200 (URN)
Conference
European college of sport science, July 2018, Dublin
Funder
The Kamprad Family Foundation, 20132082
Available from: 2018-08-20 Created: 2018-08-20 Last updated: 2018-08-20
Danielsson, T., Carlsson, J., Bergman, P. & Ahnesjö, J. (2018). Peak Oxygen Uptake Predicts Finishing- and Segment Time in a Full Distance Ironman. In: ECSS, European College of Sport Science: . Paper presented at ECSS, European College of Sport Science.
Open this publication in new window or tab >>Peak Oxygen Uptake Predicts Finishing- and Segment Time in a Full Distance Ironman
2018 (English)In: ECSS, European College of Sport Science, 2018Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

Peak Oxygen Uptake Predicts Finishing- and Segment time in a Full Distance Ironman.

INTRODUCTION: Ironman competitions and other extreme endurance events has spread worldwide attracting thousands of endurance-trained athletes, athletes who differ in anthropometric and training characteristics. The relationship between peak oxygen uptake and finishing- and segment time during a full distance IRONMAN competition (Swim 3.9km, Bike 180km and Run 42.2km) has not been examined thoroughly in non-elite athletes.

PURPOSE: The aim of the present study was to investigate the relationship between peak oxygen uptake (VO2peak), finishing time and segment time in non-elite athletes.

METHODS: 39 non-elite athletes (10 female; age 41.1 ± 9.7, range 24-70 years) performed a 20 m shuttle run test to assess VO2peak. Association between VO2 and finishing- and segment time was estimated using bivariate correlation tests. Gender specific analysis was also performed.

RESULTS: VO2peak peak was on average 49.9 ± 6.4 O2 ml/kg/minute, range 36.5-63.9 (pooled genders). Finishing time was on average 11h and 52 min. The average times for the different segments were; Swim 1h 21m, Bike 5h 46min and Run 4h 33min. The relationship between VO2peak and finishing time was significant to p<0.001 and                         0.51. The relationship between segment times were Swim  0.19, Bike  0.37 and Run  0.46 all at p<0.001. Gender specific analyses revealed that the association between VO2peak and finishing time was   0.80 for females and  0.49 for males. 

CONCLUTION: Our results suggest that VO2peak is a good predictor of finishing time (approx. 50%) as well as for segment time with 19%, 37% and 46% for Swim, Bike and Run respectively (pooled genders). For females VO2peak explains as much as 80% of the variation in finishing time.

National Category
Medical and Health Sciences
Research subject
Social Sciences, Sport Science
Identifiers
urn:nbn:se:lnu:diva-77097 (URN)
Conference
ECSS, European College of Sport Science
Projects
IRON(WO)MAN
Available from: 2018-08-13 Created: 2018-08-13 Last updated: 2018-08-13
Jönsson, T., Ekvall Hansson, E., Thorstensson, C. A., Eek, F., Bergman, P. & Dahlberg, L. E. (2018). The effect of education and supervised exercise on physical activity, pain, quality of life and self-efficacy - an intervention study with a reference group.. BMC Musculoskeletal Disorders, 19(1), Article ID 198.
Open this publication in new window or tab >>The effect of education and supervised exercise on physical activity, pain, quality of life and self-efficacy - an intervention study with a reference group.
Show others...
2018 (English)In: BMC Musculoskeletal Disorders, ISSN 1471-2474, E-ISSN 1471-2474, Vol. 19, no 1, article id 198Article in journal (Refereed) Published
Abstract [en]

BACKGROUND: Individuals with knee and hip osteoarthritis (OA) are less physically active than people in general, and many of these individuals have adopted a sedentary lifestyle. In this study we evaluate the outcome of education and supervised exercise on the level of physical activity in individuals with knee or hip OA. We also evaluate the effect on pain, quality of life and self-efficacy.

METHODS: Of the 264 included individuals with knee or hip OA, 195 were allocated to the intervention group. The intervention group received education and supervised exercise that comprised information delivered by a physiotherapist and individually adapted exercises. The reference group consisted of 69 individuals with knee or hip OA awaiting joint replacement and receiving standard care. The primary outcome was physical activity (as measured with an accelerometer). The secondary outcomes were pain (Visual Analog Scale), quality of life (EQ-5D), and self-efficacy (Arthritis Self-Efficacy Scale, pain and other symptoms subscales). Participants in both groups were evaluated at baseline and after 3 months. The intervention group was also evaluated after 12 months.

RESULTS: No differences were found in the number of minutes spent in sedentary or in physical activity between the intervention and reference groups when comparing the baseline and 3 month follow-up. However, there was a significant difference in mean change (mean diff; 95% CI; significance) between the intervention group and reference group favoring the intervention group with regard to pain (13; 7 to 19; p < 0.001), quality of life (- 0.17; - 0.24 to - 0.10; p < 0.001), self-efficacy/other symptoms (- 5; - 10 to - 0.3; p < 0.04), and self-efficacy/pain (- 7; - 13 to - 2; p < 0.01). Improvements in pain and quality of life in the intervention group persisted at the 12-month follow-up.

CONCLUSIONS: Participation in an education and exercise program following the Swedish BOA program neither decreased the average amount of sedentary time nor increased the level of physical activity. However, participation in such a program resulted in decreased pain, increased quality of life, and increased self-efficacy.

TRIAL REGISTRATION: The trial is registered with ClinicalTrials.gov. Registration number: NCT02022566 . Retrospectively registered 12/18/2013.

Place, publisher, year, edition, pages
BioMed Central, 2018
Keywords
Accelerometer, Exercise, Hip, Knee, Osteoarthritis, Patient education, Physical activity
National Category
Physiotherapy
Research subject
Social Sciences, Sport Science
Identifiers
urn:nbn:se:lnu:diva-77016 (URN)10.1186/s12891-018-2098-3 (DOI)30037339 (PubMedID)
Available from: 2018-07-27 Created: 2018-07-27 Last updated: 2018-08-31Bibliographically approved
Bergman, P. (2018). The number of repeated observations needed to estimate the habitual physical activity of an individual to a given level of precision.. PLoS ONE, 13(2), Article ID e0192117.
Open this publication in new window or tab >>The number of repeated observations needed to estimate the habitual physical activity of an individual to a given level of precision.
2018 (English)In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 13, no 2, article id e0192117Article in journal (Refereed) Published
Abstract [en]

Physical activity behavior varies naturally from day to day, from week to week and even across seasons. In order to assess the habitual level of physical activity of a person, the person must be monitored for long enough so that the level can be identified, taking into account this natural within-person variation. An important question, and one whose answer has implications for study- and survey design, epidemiological research and population surveillance, is, for how long does an individual need to be monitored before such a habitual level or pattern can be identified to a desired level of precision? The aim of this study was to estimate the number of repeated observations needed to identify the habitual physical activity behaviour of an individual to a given degree of precision. A convenience sample of 50 Swedish adults wore accelerometers during four consecutive weeks. The number of days needed to come within 5-50% of an individual's usual physical activity 95% of the time was calculated. To get an idea of the uncertainty of the estimates all statistical estimates were bootstrapped 2000 times. The mean number of days of measurement needed for the observation to, with 95% confidence, be within 20% of the habitual physical activity of an individual is highest for vigorous physical activity, for which 182 days are needed. For sedentary behaviour the equivalent number of days is 2.4. To capture 80% of the sample to within ±20% of their habitual level of physical activity, 3.4 days is needed if sedentary behavior is the outcome of interest, and 34.8 days for MVPA. The present study shows that for analyses requiring accurate data at the individual level a longer measurement collection period than the traditional 7-day protocol should be used. In addition, the amount of MVPA was negatively associated with the number of days required to identify the habitual physical activity level indicating that the least active are also those whose habitual physical activity level is the most difficult to identify. These results could have important implications for researchers whose aim is to analyse data on an individual level. Before recommendations regarding an appropriate monitoring protocol are updated, the present study should be replicated in different populations.

National Category
Public Health, Global Health, Social Medicine and Epidemiology Sport and Fitness Sciences
Research subject
Social Sciences, Sport Science
Identifiers
urn:nbn:se:lnu:diva-70902 (URN)10.1371/journal.pone.0192117 (DOI)000423793400069 ()
Available from: 2018-02-14 Created: 2018-02-14 Last updated: 2018-02-15Bibliographically approved
Carlsson, J., Danielsson, T. & Bergman, P. (2017). A two-peaked increase of serum myosin heavy chain-α after full distance triathlon demonstrates heart muscle cell death. In: : . Paper presented at 83th Annual Meeting of the German Cardiac Society – Cardiac and Circulation Research, Mannheim, Germany, April 19-22, 2017. Springer, 106, Article ID P1159.
Open this publication in new window or tab >>A two-peaked increase of serum myosin heavy chain-α after full distance triathlon demonstrates heart muscle cell death
2017 (English)Conference paper, Oral presentation only (Refereed)
Abstract [en]

Background: There is an ongoing debate about the significance of cardiac troponin T (cTnT) elevation after strenuous exercise: heart muscle cell death versus physiologic mechanism of release through an intact cell membrane. While cTnT is a small molecule (37 kDa), cardiac specific myosin heavy chain-alpha (MHC-α) is much larger (224 kDa) and an increase after exercise could hardly be explained by passage through an intact cardiac cell membrane. PURPOSE: To measure MHC-α, and other biomarkers (C-reactive protein (CRP); cTnT, creatine kinase (CK), myoglobin (MG), creatinine (C), and N-terminal prohormone of brain natriuretic peptide (NT-proBNP) before and after a full distance Ironman in order to answer the question of heart muscle cell death versus physiologic changes. 

Methods: In 52 non-elite athletes (14 female, 38 male; age 41.1 ± 9.7, range 24-70 years; all completed the race) biomarkers were measured by standard laboratory methods 7 days before, directly after, and day 1, 4 and 6 after the race. MHC-α was measured with a commercially available ELISA with no cross reactivity with other myosins. 

Results: The course of MHC-α concentration [µg/L] was 1.33 ± 0.53 (before), 2.57 ± 0.78 (directly after), 1.51 ± 0.53 (day 1), 2.74 ± 0.55 (day 4) and 1.83 ± 0.76 (day 6). Other biomarkers showed a one-peaked increase with maximal values either directly after the race or at day 1: cTnT 76 ± 80 ng/L (12-440; reference <15), NT-proBNP 776 ± 684 ng/L (92-4700; ref. < 300), CK 68 ± 55 µkat/L (5-280; ref. < 1.9), MG 2088 ± 2350 µg/L (130-17000; ref.< 72), and creatinine 100 ± 20 µmol/L (74-161; ref. < 100), CRP 49 ± 23 mg/L (15-119; ref.< 5). There was a significant correlation between MHC-α and NT-proBNP (R=0.48; p<0.001) but neither between MHC-α and cTnT (R=0.13; p=0.36) nor MHC-α and myoglobin (R=0.18; p=0.2). 

Conclusion: An Ironman leads to remarkable disturbances in biomarkers as e.g. cTnT was in the range of myocardial infarction in 100% of women and 97% of men. This is to our best knowledge the first investigation of MHC-α after strenuous exercise and its two-peaked increase most likely represents first release from the cytosolic pool and later from cell necrosis including the contractile apparatus. However, many questions remain, not at least why MHC-α baseline levels are as high as 1.33 ± 0.53 µg/L. 

Place, publisher, year, edition, pages
Springer, 2017
Series
Clinical Research in Cardiology, ISSN 1861-0684, E-ISSN 1861-0692
National Category
Cardiac and Cardiovascular Systems
Research subject
Health and Caring Sciences
Identifiers
urn:nbn:se:lnu:diva-67877 (URN)10.1007/s00392-017-1105-2 (DOI)
Conference
83th Annual Meeting of the German Cardiac Society – Cardiac and Circulation Research, Mannheim, Germany, April 19-22, 2017
Available from: 2017-09-08 Created: 2017-09-08 Last updated: 2017-09-19Bibliographically approved
Håkansson, K., Ledreux, A., Daffner, K., Terjestam, Y., Bergman, P., Carlsson, R., . . . Mohammed, A. K. H. (2017). BDNF Responses in Healthy Older Persons to 35 Minutes of Physical Exercise, Cognitive Training, and Mindfulness: Associations with Working Memory Function. Journal of Alzheimer's Disease, 55(2), 645-657
Open this publication in new window or tab >>BDNF Responses in Healthy Older Persons to 35 Minutes of Physical Exercise, Cognitive Training, and Mindfulness: Associations with Working Memory Function
Show others...
2017 (English)In: Journal of Alzheimer's Disease, ISSN 1387-2877, E-ISSN 1875-8908, Vol. 55, no 2, p. 645-657Article in journal (Refereed) Published
Abstract [en]

Brain-derived neurotrophic factor (BDNF) has a central role in brain plasticity by mediating changes in cortical thickness and synaptic density in response to physical activity and environmental enrichment. Previous studies suggest that physical exercise can augment BDNF levels, both in serum and the brain, but no other study has examined how different types of activities compare with physical exercise in their ability to affect BDNF levels. By using a balanced cross over experimental design, we exposed nineteen healthy older adults to 35-minute sessions of physical exercise, cognitive training, and mindfulness practice, and compared the resulting changes in mature BDNF levels between the three activities. We show that a single bout of physical exercise has significantly larger impact on serum BDNF levels than either cognitive training or mindfulness practice in the same persons. This is the first study on immediate BDNF effects of physical activity in older healthy humans and also the first study to demonstrate an association between serum BDNF responsivity to acute physical exercise and working memory function. We conclude that the BDNF increase we found after physical exercise more probably has a peripheral than a central origin, but that the association between post-intervention BDNF levels and cognitive function could have implications for BDNF responsivity in serum as a potential marker of cognitive health.

National Category
Psychology Neurosciences
Research subject
Social Sciences, Psychology
Identifiers
urn:nbn:se:lnu:diva-59565 (URN)10.3233/JAD-160593 (DOI)000389695700018 ()27716670 (PubMedID)
Projects
SAGE
Funder
The Kamprad Family Foundation
Available from: 2017-01-02 Created: 2017-01-02 Last updated: 2018-01-13Bibliographically approved
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
Show others...
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
Danielsson, T., Bergman, P. & Carlsson, J. (2017). Maximal Oxygen Consumption Predicts Skeletal and Heart Muscle Biomarkers Changes after a Full Distance Ironman. In: Svenska Hjärtförbundet (Ed.), 19:e Kardiovaskulära Vårmötet 2017: . Paper presented at 19:e Kardiovaskulära Vårmötet 2017, 26-28 april, Malmö. , Article ID 148-A-A1701.
Open this publication in new window or tab >>Maximal Oxygen Consumption Predicts Skeletal and Heart Muscle Biomarkers Changes after a Full Distance Ironman
2017 (English)In: 19:e Kardiovaskulära Vårmötet 2017 / [ed] Svenska Hjärtförbundet, 2017, article id 148-A-A1701Conference paper, Poster (with or without abstract) (Refereed)
Abstract [en]

Maximal Oxygen Consumption Predicts Skeletal and Heart Muscle Biomarkers Changes after a Full Distance Ironman

 

Strenuous exercise like marathon or triathlon leads to disturbances of several biomarkers, not at least markers of skeletal and heart muscle damage. Different predictors of biomarker changes, e.g. sex, age and training experience have been discussed in the literature with contradictory results. To our best knowledge, maximal oxygen consumption (VO2 max) has not been investigated in this setting.

PURPOSE:  To evaluate predictors of biomarker changes in an Ironman triathlon.

METHODS: In 39 non-elite athletes (10 female, 29 male; age 41.1 ± 9.7, range 24-70 years) who had performed a 20 m shuttle run test to predict VO2 max, biomarkers (cardiac troponin T (cTnT; reference < 14 ng/L), creatine kinase (CK; ref. < 1.9 µkat/L), myoglobin (MG; ref. <72 µg/L), and N-terminal prohormone of brain natriuretic peptide (NT-proBNP; ref. < 300 ng/L) were measured by standard laboratory methods 7 days before, directly after, and day 1, and 6 after the race.

RESULTS: VO2 max was on average 49.9 ± 6.4 O2 ml/kg/minute (range 36.5-63.9). Three biomarkers measured directly after the race were predicted by VO2 max: CK (53 ± 50 µkat/L; R= -0.44; p=0.005), MG (2137 ± 2614 µg/L; R= -0.31; p=0.056) and NT-proBNP (772 ±2614 ng/L; R= -0.35; p=0.027). cTnT (75 ± 89) was not significantly predicted by VO2 max but cTnT leakage was, in contrast to the other biomarkers, higher with higher VO2 max (R= 0.10; p=0.55) and return to normal appeared to be faster with higher VO2 max.

CONCLUSION: Earlier research into predictors of biomarker changes after strenuous exercise has found contradictory results concerning age, sex and training experience. In the present Kalmar IronWoMan study VO2 max was found to be a good predictor of biomarker changes with higher VO2 max values being correlated to lower values for CK, NT-proBNP and MG.           

National Category
Sport and Fitness Sciences
Research subject
Social Sciences, Sport Science
Identifiers
urn:nbn:se:lnu:diva-62793 (URN)
Conference
19:e Kardiovaskulära Vårmötet 2017, 26-28 april, Malmö
Available from: 2017-05-03 Created: 2017-05-03 Last updated: 2017-05-30Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-4934-8684

Search in DiVA

Show all publications