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Publikationer (10 of 114) Visa alla publikationer
Ekblom, Ö. (2020). Placebo "exercise drink" study provides a welcome wake-up call about the importance of rigorous research.. Acta Paediatrica, 109(2), 226-227
Öppna denna publikation i ny flik eller fönster >>Placebo "exercise drink" study provides a welcome wake-up call about the importance of rigorous research.
2020 (Engelska)Ingår i: Acta Paediatrica, ISSN 0803-5253, E-ISSN 1651-2227, Vol. 109, nr 2, s. 226-227Artikel i tidskrift, Editorial material (Övrigt vetenskapligt) Published
Ort, förlag, år, upplaga, sidor
John Wiley & Sons, 2020
Nationell ämneskategori
Idrottsvetenskap
Forskningsämne
Medicin/Teknik
Identifikatorer
urn:nbn:se:gih:diva-5890 (URN)10.1111/apa.15009 (DOI)31577038 (PubMedID)
Tillgänglig från: 2019-10-29 Skapad: 2019-10-29 Senast uppdaterad: 2020-01-16Bibliografiskt granskad
Salier Eriksson, J., Ekblom, B., Kallings, L., Hemmingsson, E., Andersson, G., Wallin, P., . . . Ekblom Bak, E. (2019). Active commuting in Swedish workers between 1998 and 2015 - trends, characteristics and cardiovascular disease risk.. Scandinavian Journal of Medicine and Science in Sports
Öppna denna publikation i ny flik eller fönster >>Active commuting in Swedish workers between 1998 and 2015 - trends, characteristics and cardiovascular disease risk.
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2019 (Engelska)Ingår i: Scandinavian Journal of Medicine and Science in Sports, ISSN 0905-7188, E-ISSN 1600-0838Artikel i tidskrift (Refereegranskat) Epub ahead of print
Abstract [en]

BACKGROUND: Trend analyses of active commuting and potential variations in trends and association with cardiovascular disease (CVD) risk within sub-groups are unknown.

OBJECTIVES: To a) describe trends in active commuting between 1998 to 2015 and b) to study the association between different amounts of active commuting and the incidence risk of CVD in a large sample of Swedish workers, and analyses of potential variations across sub-groups of socio-demographics, physical activity and BMI.

METHODS: A total of 318,309 participants (47% women, 18-74 years) who participated in a nationwide occupational health service screening between 1998 and 2015 were included. Commuting habits were self-reported, and data on first-time CVD events were derived from national registers.

RESULTS: Self-reported passive commuters decreased between 1998 and 2015 (64% to 56%), transferring to an increase in mainly moderate/high-dose active commuters (12% to 19%). Changes were seen in all subgroups. The characteristics and life-style habits of the typical passive and active commuter changed little over the study period. Low- and moderate/high-dose active commuters had significantly decreased risks for a first time CVD during follow-up. This was accentuated in men, middle-aged and in participants with light physical work situations, irregular exercise habits, being overweight/obese and with low fitness.

CONCLUSION: Increases in active commuting were observed between 1998 and 2015, however still leaving a majority who do not actively commute. As active commuting, regardless dose, is associated with a lower CVD risk, encouraging more people to actively commute may provide an easily accessible and time-efficient possibility to increase physical activity and health in the general population.

Ort, förlag, år, upplaga, sidor
John Wiley & Sons, 2019
Nyckelord
active commuting, cardiovascular disease, cycling, physical activity, trends, walking, working population
Nationell ämneskategori
Idrottsvetenskap
Forskningsämne
Medicin/Teknik
Identifikatorer
urn:nbn:se:gih:diva-5889 (URN)10.1111/sms.13581 (DOI)000499749900001 ()31631386 (PubMedID)
Projekt
HPI-gruppen
Tillgänglig från: 2019-10-28 Skapad: 2019-10-28 Senast uppdaterad: 2019-12-18Bibliografiskt granskad
Larsson, K., Kallings, L., Ekblom, Ö., Blom, V., Andersson, E. & Ekblom, M. (2019). Criterion validity and test-retest reliability of SED-GIH, a single item question for assessment of daily sitting time.. BMC Public Health, 19(1), Article ID 19:17.
Öppna denna publikation i ny flik eller fönster >>Criterion validity and test-retest reliability of SED-GIH, a single item question for assessment of daily sitting time.
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2019 (Engelska)Ingår i: BMC Public Health, ISSN 1471-2458, E-ISSN 1471-2458, Vol. 19, nr 1, artikel-id 19:17Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

BACKGROUND: Sedentary behaviour has been closely linked to metabolic and cardiovascular health and is therefore of importance in disease prevention. A user-friendly tool for assessment of sitting time is thus needed. Previous studies concluded that the present tools used to assess a number of sedentary behaviours are more likely to overestimate sitting than single-item questions which often underestimate sitting time, and that categorical answering options are recommended. In line with this, the single-item question with categorical answering options, SED-GIH, was developed. The aim of this study was to investigate the criterion validity of the SED-GIH question using activPAL3 micro as the criterion measure. The second aim was to evaluate the test-retest reliability of the SED-GIH questionnaire.

METHOD: In the validity section of this study, 284 middle-aged adults answered a web questionnaire, which included SED-GIH, wore activPAL and filled in a diary log for one week. Spearman's rho assessed the relationship between the SED-GIH answers and the daily average sitting time as monitored by the activPAL (activPAL-SIT), a Weighted Kappa assessed the agreement, ANOVA assessed differences in activPAL-SIT between the SED-GIH answer categories, and a Chi2 compared the proportions of hazardous sitters between the different SED-GIH answer categories. In the reliability section, 95 elderly participants answered the SED-GIH question twice, with a mean interval of 5.2 days. The reliability was assessed with ICC and a weighted Kappa.

RESULTS: The SED-GIH question correlated moderately with activPAL-SIT (rho = 0.31), with a poor agreement (weighted Kappa 0.12). In total, 40.8% underestimated and 22.2% overestimated their sitting time. The ANOVA showed significant differences in activPAL-SIT between the different SED-GIH answer categories (p < 0.001). The Chi2 showed a significant difference in proportion of individuals sitting more than 10 h per day within each SED-GIH answer category. ICC for the test-retest reliability of SED-GIH was excellent with ICC = 0.86, and the weighted Kappa showed an agreement of 0.77.

CONCLUSIONS: The unanchored single item SED-GIH question showed excellent reliability but poor validity in the investigated populations. Validity and reliability of SED-GIH is in line with other questionnaires that are commonly used when assessing sitting time.

Ort, förlag, år, upplaga, sidor
BioMed Central, 2019
Nyckelord
Adults, Office-based work, Older adults, Reliability, Sedentary behaviour, Sitting, Validity, activPAL
Nationell ämneskategori
Folkhälsovetenskap, global hälsa, socialmedicin och epidemiologi
Forskningsämne
Medicin/Teknik
Identifikatorer
urn:nbn:se:gih:diva-5520 (URN)10.1186/s12889-018-6329-1 (DOI)30611226 (PubMedID)
Tillgänglig från: 2019-01-08 Skapad: 2019-01-08 Senast uppdaterad: 2019-01-08
Väisänen, D., Ekblom, Ö., Ekblom Bak, E., Andersson, E., Nilsson, J. & Ekblom, M. (2019). Criterion validity of the Ekblom-Bak and the Åstrand submaximal test in an elderly population.. European Journal of Applied Physiology
Öppna denna publikation i ny flik eller fönster >>Criterion validity of the Ekblom-Bak and the Åstrand submaximal test in an elderly population.
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2019 (Engelska)Ingår i: European Journal of Applied Physiology, ISSN 1439-6319, E-ISSN 1439-6327Artikel i tidskrift (Refereegranskat) Epub ahead of print
Abstract [en]

PURPOSE: The aim of this study was to validate the submaximal Ekblom-Bak test (EB-test) and the Åstrand test (Å-test) for an elderly population.

METHODS: Participants (n = 104), aged 65-75 years, completed a submaximal aerobic test on a cycle ergometer followed by an individually adjusted indirect calorimetry VO2max test on a treadmill. The HR from the submaximal test was used to estimate VO2max using both the EB-test and Å-test equations.

RESULTS: The correlation between measured and estimated VO2max using the EB method and Å method in women was r = 0.64 and r = 0.58, respectively and in men r = 0.44 and r = 0.44, respectively. In women, the mean difference between estimated and measured VO2max was - 0.02 L min-1 (95% CI - 0.08 to 0.04) for the EB method and - 0.12 L min-1 (95% CI - 0.22 to - 0.02) for the Å method. Corresponding values for men were 0.05 L min-1 (95% CI - 0.04 to 0.14) and - 0.28 L min-1 (95% CI - 0.42 to - 0.14), respectively. However, the EB method was found to overestimate VO2max in men with low fitness and the Å method was found to underestimate VO2max in both women and men. For women, the coefficient of variance was 11.1%, when using the EB method and 19.8% when using the Å method. Corresponding values for men were 11.6% and 18.9%, respectively.

CONCLUSION: The submaximal EB-test is valid for estimating VO2max in elderly women, but not in all elderly men. The Å-test is not valid for estimating VO2max in the elderly.

Ort, förlag, år, upplaga, sidor
Springer, 2019
Nyckelord
Cardiorespiratory fitness, Elderly, Oxygen uptake, Public health, Submaximal test, Validity
Nationell ämneskategori
Idrottsvetenskap
Forskningsämne
Medicin/Teknik; Medicin/Teknik
Identifikatorer
urn:nbn:se:gih:diva-5960 (URN)10.1007/s00421-019-04275-7 (DOI)31820103 (PubMedID)
Tillgänglig från: 2019-12-18 Skapad: 2019-12-18 Senast uppdaterad: 2019-12-18
Ekblom, M., Bojsen-Möller, E., Tarassova, O. & Ekblom, Ö. (2019). Day-to day variations in physical activity patterns affect corticospinal excitability on the following day. In: Brain Stimulation March-April 2019, vol 12, issue 2: . Paper presented at 3rd International Brain Stimulation Conference, Feb 24-27 2019, Vancouver (pp. 468). Elsevier, 12(2), Article ID 437.
Öppna denna publikation i ny flik eller fönster >>Day-to day variations in physical activity patterns affect corticospinal excitability on the following day
2019 (Engelska)Ingår i: Brain Stimulation March-April 2019, vol 12, issue 2, Elsevier, 2019, Vol. 12, nr 2, s. 468-, artikel-id 437Konferensbidrag, Muntlig presentation med publicerat abstract (Övrigt vetenskapligt)
Ort, förlag, år, upplaga, sidor
Elsevier, 2019
Nationell ämneskategori
Fysiologi
Forskningsämne
Medicin/Teknik
Identifikatorer
urn:nbn:se:gih:diva-5738 (URN)10.1016/j.brs.2018.12.523 (DOI)
Konferens
3rd International Brain Stimulation Conference, Feb 24-27 2019, Vancouver
Tillgänglig från: 2019-05-09 Skapad: 2019-05-09 Senast uppdaterad: 2019-12-02Bibliografiskt granskad
Ekblom Bak, E., Ekblom, Ö., Andersson, G., Wallin, P., Söderling, J., Hemmingsson, E. & Ekblom, B. (2019). Decline in cardiorespiratory fitness in the Swedish working force between 1995 and 2017.. Scandinavian Journal of Medicine and Science in Sports, 29(2), 232-239
Öppna denna publikation i ny flik eller fönster >>Decline in cardiorespiratory fitness in the Swedish working force between 1995 and 2017.
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2019 (Engelska)Ingår i: Scandinavian Journal of Medicine and Science in Sports, ISSN 0905-7188, E-ISSN 1600-0838, Vol. 29, nr 2, s. 232-239Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

BACKGROUND: Long-term trend analyses of cardiorespiratory fitness (VO2 max) in the general population are limited.

OBJECTIVES: To describe trends in VO2 max from 1995 to 2017 in the Swedish working force and to study developments across categories of sex, age, education, and geographic regions.

METHODS: 354.277 participants (44% women, 18-74 years) who participated in a nationwide occupational health service screening between 1995 and 2017 were included. Changes in standardized mean values of absolute (L·min-1 ) and relative (ml·min-1 ·kg-1 ) VO2 max, and the proportion with low (<32) relative VO2 max are reported. VO2 max was estimated using a submaximal cycle test.

RESULTS: Absolute VO2 max decreased by -6.7% (-0.19 L·min-1 ) in the total population. Relative VO2 max decreased by -10.8% (-4.2 ml·min-1 ·kg-1 ) with approximately one-third explained by a simultaneous increase in body mass. Decreases in absolute fitness were more pronounced in men vs. women (8.7% vs. 5.3%), in younger vs. older (6.5% vs 2.3%), in short (11.4%) vs. long (4.5%) education, and in rural vs. urban regions (6.5% vs 3.5%), all p<0.001. The proportions with low VO2 max increased from 27% to 46% (p<0.001).

CONCLUSION: Between 1995 and 2017, there was a steady and pronounced decline in mean cardiorespiratory fitness in Swedish adults. Male gender, young age, short education and living in a rural area were predictive of greater reductions. The proportion with low cardiorespiratory fitness almost doubled. Given the strong associations between cardiorespiratory fitness and multiple morbidities and mortality, preventing further decreases is a clear public health priority, especially for vulnerable groups. This article is protected by copyright. All rights reserved.

Ort, förlag, år, upplaga, sidor
John Wiley & Sons, 2019
Nyckelord
Maximal oxygen consumption, VO2max, aerobic capacity, population, secular trend
Nationell ämneskategori
Fysiologi
Forskningsämne
Medicin/Teknik
Identifikatorer
urn:nbn:se:gih:diva-5460 (URN)10.1111/sms.13328 (DOI)30351472 (PubMedID)
Projekt
HPI-gruppen
Tillgänglig från: 2018-10-31 Skapad: 2018-10-31 Senast uppdaterad: 2019-01-18Bibliografiskt granskad
Kuster, R. P., Grooten, W. J., Baumgartner, D., Blom, V., Hagströmer, M. & Ekblom, Ö. (2019). Detecting Prolonged Sitting Bouts with the ActiGraph GT3X.. Scandinavian Journal of Medicine and Science in Sports
Öppna denna publikation i ny flik eller fönster >>Detecting Prolonged Sitting Bouts with the ActiGraph GT3X.
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2019 (Engelska)Ingår i: Scandinavian Journal of Medicine and Science in Sports, ISSN 0905-7188, E-ISSN 1600-0838Artikel i tidskrift (Refereegranskat) Epub ahead of print
Abstract [en]

The ActiGraph has a high ability to measure physical activity, however, it lacks an accurate posture classification to measure sedentary behaviour. The aim of the present study was to develop an ActiGraph (waist-worn, 30Hz) posture classification to detect prolonged sitting bouts, and to compare the classification to proprietary ActiGraph data. The activPAL, a highly valid posture classification device, served as reference criterion.1 Both sensors were worn by 38 office workers over a median duration of 9 days. An automated feature selection extracted the relevant signal information for a minute based posture classification. The machine-learning algorithm with optimal feature number to predict the time in prolonged sitting bouts (≥5 and ≥10 minutes) was searched and compared to the activPAL using Bland-Altman statistics. The comparison included optimised and frequently used cut-points (100 and 150 counts-per-minute (cpm), with and without low-frequency-extension (LFE) filtering). The new algorithm predicted the time in prolonged sitting bouts most accurate (bias ≤7 minutes/day). Of all proprietary ActiGraph methods, only 150 cpm without LFE predicted the time in prolonged sitting bouts non-significantly different from the activPAL (bias ≤18 minutes/day). However, the frequently used 100 cpm with LFE accurately predicted total sitting time (bias ≤7 minutes/day). To study the health effects of ActiGraph measured prolonged sitting, we recommend using the new algorithm. In case a cut-point is used, we recommend 150 cpm without LFE to measure prolonged sitting, and 100 cpm with LFE to measure total sitting time. However, both cpm cut-points are not recommended for a detailed bout analysis.

Nyckelord
Automated Feature Selection, Bout Analysis, Machine Learning, Posture Prediction, Sedentary Behaviour, activPAL
Nationell ämneskategori
Arbetsmedicin och miljömedicin
Forskningsämne
Medicin/Teknik
Identifikatorer
urn:nbn:se:gih:diva-5934 (URN)10.1111/sms.13601 (DOI)000503822900001 ()31743494 (PubMedID)
Tillgänglig från: 2019-12-02 Skapad: 2019-12-02 Senast uppdaterad: 2020-01-07Bibliografiskt granskad
Ekblom, M., Ekblom, Ö., Börjesson, M., Bergström, G., Jern, C. & Wallin, A. (2019). Device-Measured Sedentary Behavior, Physical Activity and Aerobic Fitness Are Independent Correlates of Cognitive Performance in Healthy Middle-Aged Adults-Results from the SCAPIS Pilot Study.. International Journal of Environmental Research and Public Health, 16(24), Article ID E5136.
Öppna denna publikation i ny flik eller fönster >>Device-Measured Sedentary Behavior, Physical Activity and Aerobic Fitness Are Independent Correlates of Cognitive Performance in Healthy Middle-Aged Adults-Results from the SCAPIS Pilot Study.
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2019 (Engelska)Ingår i: International Journal of Environmental Research and Public Health, ISSN 1661-7827, E-ISSN 1660-4601, Vol. 16, nr 24, artikel-id E5136Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

High aerobic fitness, more moderate to vigorous physical activity (MVPA) and less sedentary behavior (SED) have all been suggested to promote cognitive functions, but it is unclear whether they are independent predictors of specific cognitive domains. This study aimed to investigate to what extent aerobic fitness MVPA and SED are independently associated with cognitive performance among middle-aged Swedish adults. We acquired device-based measures of aerobic fitness, cognitive performance and percent daily time spent in MVPA and SED in Swedish adults (n = 216; 54-66 years old). Aerobic fitness was associated with better performance at one out of two tests of speed/attention and one out of four tests of executive attention, and with worse performance at one of seven tests of memory. Increasing %MVPA was associated with better performance at one out of seven tests of memory and two out of three tests of verbal ability, whereas increasing %SED was associated with better performance at all four tests of executive attention and four out of seven tests of memory. These findings suggest that aerobic fitness, %MVPA and %SED are partly independent correlates of cognitive performance. To fully understand the association between SED and performance at several tests of cognitive function, future investigations might attempt to investigate intellectually engaging SED (such as reading books) separately from mentally undemanding SED (such as watching TV).

Ort, förlag, år, upplaga, sidor
MDPI, 2019
Nyckelord
accelerometry, cognitive functions, exercise, physical activity, sedentary behavior
Nationell ämneskategori
Folkhälsovetenskap, global hälsa, socialmedicin och epidemiologi
Forskningsämne
Medicin/Teknik
Identifikatorer
urn:nbn:se:gih:diva-5980 (URN)10.3390/ijerph16245136 (DOI)31888199 (PubMedID)
Tillgänglig från: 2020-01-07 Skapad: 2020-01-07 Senast uppdaterad: 2020-01-07
Fridolfsson, J., Börjesson, M., Buck, C., Ekblom, Ö., Ekblom Bak, E., Hunsberger, M., . . . Arvidsson, D. (2019). Effects of Frequency Filtering on Intensity and Noise in Accelerometer-Based Physical Activity Measurements.. Sensors, 19(9), Article ID E2186.
Öppna denna publikation i ny flik eller fönster >>Effects of Frequency Filtering on Intensity and Noise in Accelerometer-Based Physical Activity Measurements.
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2019 (Engelska)Ingår i: Sensors, ISSN 1424-8220, E-ISSN 1424-8220, Vol. 19, nr 9, artikel-id E2186Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

In objective physical activity (PA) measurements, applying wider frequency filters than the most commonly used ActiGraph (AG) filter may be beneficial when processing accelerometry data. However, the vulnerability of wider filters to noise has not been investigated previously. This study explored the effect of wider frequency filters on measurements of PA, sedentary behavior (SED), and capturing of noise. Apart from the standard AG band-pass filter (0.29-1.63 Hz), modified filters with low-pass component cutoffs at 4 Hz, 10 Hz, or removed were analyzed. Calibrations against energy expenditure were performed with lab data from children and adults to generate filter-specific intensity cut-points. Free-living accelerometer data from children and adults were processed using the different filters and intensity cut-points. There was a contribution of acceleration related to PA at frequencies up to 10 Hz. The contribution was more pronounced at moderate and vigorous PA levels, although additional acceleration also occurred at SED. The classification discrepancy between AG and the wider filters was small at SED (1-2%) but very large at the highest intensities (>90%). The present study suggests an optimal low-pass frequency filter with a cutoff at 10 Hz to include all acceleration relevant to PA with minimal effect of noise.

Ort, förlag, år, upplaga, sidor
MDPI, 2019
Nyckelord
ActiGraph, Axivity, I.Family, LIV-2013, adults, calibration, children
Nationell ämneskategori
Medicinsk laboratorie- och mätteknik Idrottsvetenskap
Forskningsämne
Medicin/Teknik
Identifikatorer
urn:nbn:se:gih:diva-5745 (URN)10.3390/s19092186 (DOI)000469766800230 ()31083538 (PubMedID)
Projekt
Mätning av det dagliga aktivitetsmönstret
Tillgänglig från: 2019-05-20 Skapad: 2019-05-20 Senast uppdaterad: 2019-08-20
Yang, L., Lu, K., Forsman, M., Lindecrantz, K., Seoane, F., Ekblom, Ö. & Eklund, J. (2019). Evaluation of physiological workload assessment methods using heart rate and accelerometry for a smart wearable system.. Ergonomics, 62(5), 694-705
Öppna denna publikation i ny flik eller fönster >>Evaluation of physiological workload assessment methods using heart rate and accelerometry for a smart wearable system.
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2019 (Engelska)Ingår i: Ergonomics, ISSN 0014-0139, E-ISSN 1366-5847, Vol. 62, nr 5, s. 694-705Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Work metabolism (WM) can be accurately estimated by oxygen consumption (VO2), which is commonly assessed by heart rate (HR) in field studies. However, the VO2-HR relationship is influenced by individual capacity and activity characteristics. The purpose of this study was to evaluate three models for estimating WM compared with indirect calorimetry, during simulated work activities. The techniques were: the HR-Flex model; HR branched model, combining HR with hip-worn accelerometers (ACC); and HR + arm-leg ACC model, combining HR with wrist- and thigh-worn ACC. Twelve participants performed five simulated work activities and three submaximal tests. The HR + arm-leg ACC model had the overall best performance with limits of agreement (LoA) of -3.94 and 2.00 mL/min/kg, while the HR-Flex model had -5.01 and 5.36 mL/min/kg and the branched model, -6.71 and 1.52 mL/min/kg. In conclusion, the HR + arm-leg ACC model should, when feasible, be preferred in wearable systems for WM estimation. Practitioner Summary: Work with high energy demand can impair employees' health and life quality. Three models were evaluated for estimating work metabolism during simulated tasks. The model combining heart rate, wrist- and thigh-worn accelerometers showed the best accuracy. This is, when feasible, suggested for wearable systems to assess work metabolism.

Ort, förlag, år, upplaga, sidor
Taylor & Francis, 2019
Nyckelord
Heart rate, estimation models, motion sensing, risk assessment, wearable sensors, work metabolism
Nationell ämneskategori
Arbetsmedicin och miljömedicin
Forskningsämne
Medicin/Teknik
Identifikatorer
urn:nbn:se:gih:diva-5702 (URN)10.1080/00140139.2019.1566579 (DOI)30806164 (PubMedID)
Tillgänglig från: 2019-04-04 Skapad: 2019-04-04 Senast uppdaterad: 2019-11-06Bibliografiskt granskad
Organisationer
Identifikatorer
ORCID-id: ORCID iD iconorcid.org/0000-0001-6058-4982

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