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Publications (6 of 6) Show all publications
Björkman, F., Ekblom-Bak, E., Ekblom, Ö. & Ekblom, B. (2016). Validity of the revised Ekblom Bak cycle ergometer test in adults.. European Journal of Applied Physiology, 116(9), 1627-1638
Open this publication in new window or tab >>Validity of the revised Ekblom Bak cycle ergometer test in adults.
2016 (English)In: European Journal of Applied Physiology, ISSN 1439-6319, E-ISSN 1439-6327, Vol. 116, no 9, p. 1627-1638Article in journal (Refereed) Published
Abstract [en]

PURPOSE: To further develop the Ekblom Bak-test prediction equation for estimation of VO2max from submaximal cycle ergometry.

METHODS: The model group (117 men and 100 women, aged 48.3 ± 15.7 and 46.1 ± 16.8 years, VO2max 46.6 ± 11.1 and 40.4 ± 9.6 mL kg(-1) min(-1), respectively) and the cross-validation group (60 men and 55 women, aged 40.6 ± 17.1 and 41.6 ± 16.7 years, VO2max 49.0 ± 12.1 and 43.2 ± 8.9 mL min(-1) kg(-1), respectively) performed 4 min of cycling on a standard work rate (30 W) directly followed by 4 min on a higher work rate. Heart rate (HR) at each work rate was recorded. Thereafter, participants completed a graded maximal treadmill test for direct measurement of oxygen uptake. The new prediction equation was cross-validated and accuracy compared with the original Ekblom Bak equation as well as by the Åstrand test method.

RESULTS: The final sex-specific regression models included age, change in HR per-unit change in power (ΔHR/ΔPO), the difference in work rates (ΔPO), and HR at standard work rate as independent variables. The adjusted R (2) for the final models were 0.86 in men and 0.83 in women. The coefficient of variation (CV) was 8.7 % and SEE 0.28 L min(-1). The corresponding CV and SEE values for the EB-test2012 and the Åstrand tests were 10.9 and 18.1 % and 0.35 and 0.48 L min(-1), respectively.

CONCLUSION: The new EB-test prediction equation provides an easy administered and valid estimation of VO2max for a wide variety of ages (20-86 years) and fitness levels (19-76 mL kg(-1) min(-1)).

National Category
Sport and Fitness Sciences
Research subject
Medicine/Technology
Identifiers
urn:nbn:se:gih:diva-4474 (URN)10.1007/s00421-016-3412-0 (DOI)000384214300002 ()27311582 (PubMedID)
Projects
Långvarigt stillasittande
Available from: 2016-06-21 Created: 2016-06-21 Last updated: 2017-11-28
Ekblom-Bak, E., Björkman, F., Hellenius, M.-L. & Ekblom, B. (2014). A new submaximal cycle ergometer test for prediction of VO(2max).. Scandinavian Journal of Medicine and Science in Sports, 24(2), 319-326
Open this publication in new window or tab >>A new submaximal cycle ergometer test for prediction of VO(2max).
2014 (English)In: Scandinavian Journal of Medicine and Science in Sports, ISSN 0905-7188, E-ISSN 1600-0838, Vol. 24, no 2, p. 319-326Article in journal (Refereed) Published
Abstract [en]

Maximal oxygen uptake (VO(2max) ) is an important, independent predictor of cardiovascular health and mortality. Despite this, it is rarely measured in clinical practice. The aim of this study was to create and evaluate a submaximal cycle ergometry test based on change in heart rate (HR) between a lower standard work rate and an individually chosen higher work rate. In a mixed population (n = 143) with regard to sex (55% women), age (21-65 years), and activity status (inactive to highly active), a model included change in HR per unit change in power, sex, and age for the best estimate of VO(2max) . The association between estimated and observed VO(2max) for the mixed sample was r = 0.91, standard error of estimate = 0.302 L/min, and mean measured VO(2max)  = 3.23 L/min. The corresponding coefficient of variation was 9.3%, a significantly improved precision compared with one of the most commonly used submaximal exercise tests, the Åstrand test, which in the present study was estimated to be 18.1%. Test-retest reliability analysis over 1 week revealed no mean difference in the estimated VO(2max) (-0.02 L/min, 95% confidence interval: -0.07-0.03). The new test is low-risk, easily administered, and valid for a wide capacity range, and is therefore suitable in situations as health evaluations in the general population.

National Category
Medical and Health Sciences
Research subject
Medicine/Technology
Identifiers
urn:nbn:se:gih:diva-2480 (URN)10.1111/sms.12014 (DOI)23126417 (PubMedID)
Projects
Långvarigt stillasittande
Available from: 2012-11-19 Created: 2012-11-19 Last updated: 2017-12-07Bibliographically approved
Mattsson, C. M., Björkman, F., Edin, F., Larsen, F. & Ekblom, B. (2013). Regular moist snuff dipping does not affect endurance exercise performance. In: : . Paper presented at 18th European College of Sport Sciences (ECSS) Congress 26-29 June 2013 Barcelona.
Open this publication in new window or tab >>Regular moist snuff dipping does not affect endurance exercise performance
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2013 (English)Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

Physiological and medical effects of snuff have previously been obtained either in cross-sectional studies or after snuff administration to non-tobacco users, but the effects of snuff cessation (SC) after several years of daily use on individual level are unknown. 24 participants with >2 years of daily snuff-use were tested before and after >6 weeks SC (SCG), together with a control group (CO) of 11 snuff users who kept their normal habits. Resting heart rate (HR) was significantly lower in SCG after SC. Body mass in SCG group increased by 1.4 ± 1.7 kg and blood pressure (BP) were reduced, but without significant differences between groups. Total cholesterol increased from 4.12 ± 0.54 (95% CI 3.89–4.35) to 4.46 ± 0.70 (95% CI 4.16–4.75) mM/L in SCG, due to increased LDL, and this change was significantly different from CO. Resting values of HDL, C-reactive protein, and free fatty acids (FFA) remained unchanged in both groups. During a four-stage incremental (from 50 to 80% of VO2max) and a prolonged (60 min at 50% of VO2max) cycling test HR and BP were reduced in SCG, while oxygen uptake (VO2), respiratory exchange ratio, blood lactate (bLa) and blood glucose (bGlu) concentration, and rate of perceived exertion were unchanged. All measurements were unchanged in CO. During the prolonged exercise FFA was reduced but there was no significant difference between groups. During the maximal treadmill running test peak values of VO2, pulmonary ventilation (VE), time to exhaustion and bLa were unchanged in both groups. In conclusion, endurance exercise performance (VO2max and maximal endurance time) does not seem to be affected by prolonged snuff use, while effects on cardiovascular risk factors are contradictory.

Keywords
Smokeless tobacco, Nicotine, Cardiovascular risk factors
National Category
Sport and Fitness Sciences Physiology Health Sciences
Research subject
Medicine/Technology
Identifiers
urn:nbn:se:gih:diva-3031 (URN)
Conference
18th European College of Sport Sciences (ECSS) Congress 26-29 June 2013 Barcelona
Available from: 2013-11-04 Created: 2013-11-04 Last updated: 2018-01-11Bibliographically approved
Björkman, F. & Mattsson, C. M. (2012). Antiinflammatoriska medel troliga storsäljare i OS. Svensk Idrottsforskning: Organ för Centrum för Idrottsforskning (2), 40-43
Open this publication in new window or tab >>Antiinflammatoriska medel troliga storsäljare i OS
2012 (Swedish)In: Svensk Idrottsforskning: Organ för Centrum för Idrottsforskning, ISSN 1103-4629, no 2, p. 40-43Article in journal (Other academic) Published
Abstract [sv]

Det är mycket vanligt att idrottare använder antiinflammatoriska läkemedel både för att behandla skador och döva smärta. Hur lämpligt är det att använda preparaten under hård träning och tävling, och vad kan medicineringen ha för konsekvenser?

Keywords
NSAID, antiinflammatoriska läkemedel, elitidrott, muskelskada, träningsvärk
National Category
Physiology Pharmacology and Toxicology Sport and Fitness Sciences
Research subject
Medicine/Technology
Identifiers
urn:nbn:se:gih:diva-2377 (URN)
Available from: 2012-08-06 Created: 2012-07-22 Last updated: 2018-01-12Bibliographically approved
Björkman, F. & Mattsson, C. M. (2011). Hur farlig är multisport?. Svensk IdrottsMedicin, 30(4), 8-11
Open this publication in new window or tab >>Hur farlig är multisport?
2011 (Swedish)In: Svensk IdrottsMedicin, ISSN 1103-7652, Vol. 30, no 4, p. 8-11Article in journal (Other academic) Published
Abstract [sv]

Den övervägande delen av deltagarna i större multisporttävlingar drabbas av någon typ av skada som i de flesta fall är lindrig. Men det är ändå ingen tvekan om att multisport kan vara farligt. Det ställs höga krav på medicinsk personal att kunna hantera en mångfald av skador och sjukdomar.

National Category
Physiology Sport and Fitness Sciences General Practice
Research subject
Medicine/Technology
Identifiers
urn:nbn:se:gih:diva-1992 (URN)
Projects
Physiology of Adventure Racing
Available from: 2011-11-23 Created: 2011-11-23 Last updated: 2018-01-12Bibliographically approved
Björkman, F., Edin, F., Mattsson, C. M., Larsen, F. & Ekblom, B. Regular oral moist snuff dipping does not impair physical performance.
Open this publication in new window or tab >>Regular oral moist snuff dipping does not impair physical performance
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(English)Article in journal (Refereed) Submitted
Keywords
maximal oxygen uptake, blood pressure, free fatty acids, cholesterol, postural sway, tobacco, smokeless tobacco
National Category
Physiology Health Care Service and Management, Health Policy and Services and Health Economy Sport and Fitness Sciences
Research subject
Medicine/Technology
Identifiers
urn:nbn:se:gih:diva-1815 (URN)
Available from: 2011-05-25 Created: 2011-05-25 Last updated: 2018-01-12Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-8353-3766

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