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Sjoström, Rita
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Publications (10 of 16) Show all publications
Essner, A., Sjöström, R., Ahlgren, E., Gustås, P., Edge-Hughes, L., Zetterberg, L. & Hellström, K. (2015). Comparison of Polar® RS800CX heart rate monitor and electrocardiogram for measuring inter-beat intervals in healthy dogs. Physiology and Behavior, 138(January), 247-253
Open this publication in new window or tab >>Comparison of Polar® RS800CX heart rate monitor and electrocardiogram for measuring inter-beat intervals in healthy dogs
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2015 (English)In: Physiology and Behavior, ISSN 0031-9384, E-ISSN 1873-507X, Vol. 138, no January, p. 247-253Article in journal (Refereed) Published
Abstract [en]

The aim of the present study was to assess the criterion validity, relative reliability and level of agreement ofPolar® RS800CX heart rate monitor measuring inter-beat intervals (IBIs), compared to simultaneously recordedelectrocardiogram (ECG) in dogs.Methods: Five continuous minutes of simultaneously recorded IBIs from Polar® RS800CX and Cardiostore ECG in11 adult healthy dogs maintaining standing position were analyzed. Polar® data was statistically compared toECG data to assess for systematic differences between the methods. Three different methods for handling missingIBI data were used. Criterion validities were calculated by intraclass correlation coefficients (ICCs) and corresponding95% confidence intervals (CIs). Relative reliabilities and levels of agreement were calculated by ICCsand the Bland and Altman analysis for repeated measurements per subject.Results: Correlation coefficients between IBI data from ECG and Polar® RS800CX varied between 0.73 and 0.84depending on how missing values were handled. Polar® was over- and underestimating IBI data compared toECG. The mean difference in log transformed (base10) IBI data was 0.8%, and 93.2% of the values were withinthe limits of agreement. Internally excluding three subjects presenting IBI series containing more than 5% erroneousIBIs resulted in ICCs between 0.97 and 0.99. Bland and Altman analysis (n = 8) showed mean differencewas 1.8 ms, and 98.5% of the IBI values were plotted inside limits of agreement.Conclusion: This study showed that Polar® systematically biased recorded IBI series and that it was fundamentalto detect measurement errors. For Polar® RS800CX heart rate monitor to be used interchangeably to ECG, byshowing excellent criterion validity and reliable IBI measures in group and individual samples, only less than5% of artifacts could be accepted.

Place, publisher, year, edition, pages
Elsevier, 2015
Keywords
Behavior, Dogs, Heart rate variability, Physiotherapy, Reliability, Validity
National Category
Health Sciences
Identifiers
urn:nbn:se:miun:diva-23558 (URN)10.1016/j.physbeh.2014.10.034 (DOI)000348882900034 ()2-s2.0-84910682884 (Scopus ID)
Available from: 2014-12-01 Created: 2014-12-01 Last updated: 2017-12-05Bibliographically approved
Bele, S., Ostenberg, A. H., Sjoström, R. & Alricsson, M. (2015). Experiences of returning to elite beach volleyball after shoulder injury. Journal of Exercise Rehabilitation, 11(4), 204-10
Open this publication in new window or tab >>Experiences of returning to elite beach volleyball after shoulder injury
2015 (English)In: Journal of Exercise Rehabilitation, ISSN 2288-176X, Vol. 11, no 4, p. 204-10Article in journal (Refereed) Published
Abstract [en]

The purpose of this study was to examine beach volleyball players' experience regarding shoulder injury and how it affects their return to play. To achieve the research aims a qualitative design with semi-structured interviews had been conducted, five elite beach volleyball players, four men and one woman aged 27-42 participated in the study. All participants had suffered a severe shoulder injury, with absence from training and competing for at least 28 days. The findings of this study indicate that it is the individual's inner motivation, together with a clear goal and support from the community, family, teammate and coach that are the most important factors when going through rehabilitation and getting back to playing beach volleyball after a shoulder injury. All participants had been affected by their injury in some way; some of the participants had been affected in a positive way since they had become mentally stronger and had developed better volleyball technique after rehabilitation. The conclusions of this study indicate that there are three distinct factors that increase the chances of getting back to playing beach volleyball after shoulder injury; it is the players' self motivation, together with a clear goal and support from the community.

Keywords
Beach volleyball players, Qualitative method, Rehabilitation, Return to elite level, Sport injury
National Category
Sport and Fitness Sciences
Identifiers
urn:nbn:se:miun:diva-26003 (URN)10.12965/jer.150213 (DOI)26331135 (PubMedID)2288-176X (Print) 2288-176x (ISBN)
Note

eCollection 2015 Aug.

Available from: 2015-09-29 Created: 2015-09-29 Last updated: 2017-08-15Bibliographically approved
Essner, A., Sjöström, R., Gustås, P., Edge-Hughes, L., Zetterberg, L. & Hellström, K. (2015). Validity and reliability properties of canine short-term heart rate variability measures-a pilot study. Journal of Veterinary Behavior: Clinical Applications and Research, 10(5), 384-390
Open this publication in new window or tab >>Validity and reliability properties of canine short-term heart rate variability measures-a pilot study
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2015 (English)In: Journal of Veterinary Behavior: Clinical Applications and Research, ISSN 1558-7878, E-ISSN 1878-7517, Vol. 10, no 5, p. 384-390Article in journal (Refereed) Published
Abstract [en]

The objective of the pilot study was to compare validity and reliability properties of Polar RS800CX (Polar Electro Oy, Kempele, Finland) against simultaneously recorded electrocardiogram (ECG) measuring time- and frequency-based short-term heart rate variability (HRV) parameters, in dogs during stationary standing position. Five-minute recordings with less than 5% error rates from inter-beat interval (IBI) series obtained by Polar RS800CX and ECG, in 8 adult dogs, were used for HRV analysis. Polar data were statistically compared to the ECG data to assess for systematic differences in time- and frequency-based HRV parameters. Relative and absolute reliabilities were estimated by intraclass correlation coefficient, Spearman ρ, Bland and Altman analysis, standard error of measurement, and standard error of measurements in percentage. Paired t test was used to determine the statistical significance of differences between the measurement methods. Results: There were high correlation coefficients between HRV parameters obtained from Polar RS800CX and ECG. Intraclass correlation coefficients were 0.98-1.00, and Spearman ρ was 0.93-0.98. There were differences between the methods in 2 HRV parameters, the standard deviation of normal-to-normal IBIs (SDNN) (P = 0.035) and the square root of the mean squared differences of successive normal-to normal IBIs (RMSSD) (P = 0.034). Standard error of measurements was between 2.8-11.6% in ECG and between 2.6-11.8% in Polar, indicating rather high measurement error in 3 of the HRV parameters in both measurement methods. Close agreements and high correlation estimates in this pilot study indicated acceptable relative reliability in Polar RS800CX measuring time- and frequency-based HRV parameters in the group of dogs studied. However, the present pilot study revealed differences between Polar RS800CX and ECG in time-based standard deviation of normal-to-normal and square root of the mean squared differences of successive normal-to normal parameters, and that small amounts of erroneous IBI segments from Polar negatively impact on the validity and reliability properties of Polar RS800CX. © 2015 Elsevier Inc.

Keywords
Behavior, Dogs, Heart rate variability, Reliability, Validity
National Category
Veterinary Science
Identifiers
urn:nbn:se:miun:diva-25928 (URN)10.1016/j.jveb.2015.05.006 (DOI)000360648200003 ()2-s2.0-84940451526 (Scopus ID)
Note

Export Date: 23 September 2015

Available from: 2015-09-23 Created: 2015-09-23 Last updated: 2017-12-01Bibliographically approved
Nordahl, B., Sjöström, R., Westin, M., Werner, S. & Alricsson, M. (2014). Experiences of returning to elite alpine skiing after ACL injury and ACL reconstruction. International Journal of Adolescent Medicine and Health, 26(1), 69-77
Open this publication in new window or tab >>Experiences of returning to elite alpine skiing after ACL injury and ACL reconstruction
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2014 (English)In: International Journal of Adolescent Medicine and Health, ISSN 0334-0139, E-ISSN 2191-0278, Vol. 26, no 1, p. 69-77Article in journal (Refereed) Published
Abstract [en]

Aim: To explore the experiences of alpine skiing at the elite level after anterior cruciate ligament (ACL) injury and reconstruction.

Design: A qualitative approach where semi-structured interviews were conducted, and an analysis of the manifest content was performed.

Participants: Five ski high school students, two male and three female skiers, who had suffered ACL injuries and undergone ACL reconstructions.

Results: Seven categories were identified. The participants described their perceived opportunities with regard to returning to alpine skiing after ACL injury and reconstruction as something positive to do with self-belief, being mentally and physically prepared, regaining confidence in their own ability, being given time and using active strategies. In contrast, perceived barriers to a return to elite alpine skiing gave rise to negative feelings, for example, fear, disheartenment, a total lack of or ambivalent confidence in their own ability and the use of passive strategies.

Conclusion: The two male skiers returned to alpine skiing. They reported confidence in their own ability, active strategies and support on all levels, as well as enhanced physical ability. The female skiers did not return to their pre-injury level of competitive alpine skiing. They stated a lack of support on all levels, deterioration in their physical ability and two out of three reported passive strategies and no or ambivalent confidence in their own ability. The most important factors were family support, support on all levels, access to a physiotherapist and time given.

Place, publisher, year, edition, pages
Walter de Gruyter, 2014
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:miun:diva-20451 (URN)10.1515/ijamh-2012-0114 (DOI)23358350 (PubMedID)2-s2.0-84901706174 (Scopus ID)
Available from: 2013-12-04 Created: 2013-12-04 Last updated: 2017-12-06Bibliographically approved
Sjöström, R. (2014). HälsoSam Ström: Slutrapport.
Open this publication in new window or tab >>HälsoSam Ström: Slutrapport
2014 (Swedish)Report (Other (popular science, discussion, etc.))
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:miun:diva-22285 (URN)
Available from: 2014-06-25 Created: 2014-06-25 Last updated: 2014-06-26Bibliographically approved
Sjöström, R. (2013). Bättre Omhändertagande av patienter med Artros: Jämtlands läns landsting - slutrapport. Östersund: Jämtlands Läns Landsting
Open this publication in new window or tab >>Bättre Omhändertagande av patienter med Artros: Jämtlands läns landsting - slutrapport
2013 (Swedish)Report (Other (popular science, discussion, etc.))
Place, publisher, year, edition, pages
Östersund: Jämtlands Läns Landsting, 2013. p. 19
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:miun:diva-22286 (URN)
Available from: 2014-06-25 Created: 2014-06-25 Last updated: 2014-06-26Bibliographically approved
Sjöström, R., Asplund, R. & Alricsson, M. (2013). Evaluation of a multidisciplinary rehabilitation program with emphasis on musculoskeletal disorders: A 5-year follow-up. Work: A journal of Prevention, Assesment and rehabilitation, 45(2), 175-182
Open this publication in new window or tab >>Evaluation of a multidisciplinary rehabilitation program with emphasis on musculoskeletal disorders: A 5-year follow-up
2013 (English)In: Work: A journal of Prevention, Assesment and rehabilitation, ISSN 1051-9815, E-ISSN 1875-9270, Vol. 45, no 2, p. 175-182Article in journal (Refereed) Published
Abstract [en]

OBJECTIVE: The aim of this study was to perform a 5-year follow-up of a 7-week multidisciplinary rehabilitation program focusing on pain, physical disability, anxiety and depression as well as stress and sick leave and to compare the results from the baseline, a 2-year follow-up and this 5-year follow-up. PARTICIPANTS: Out of 60 participants of the original rehabilitation program 54 were followed-up after 5 years. METHODS: The rehabilitation program was individually adapted and consisted of physical activity in several forms as well as theoretical and practical education. At baseline (start of study) and 2 and 5 years after completion of the rehabilitation program all participants were evaluated in terms of sick leave, pain rating (Visual Analogue Scale), the Disability Rating Index, Hospital Anxiety and Depression Scale, and Stress Test. RESULTS: Between the start of the program and the 5-year follow-up pain rating (P < 0.017) and the rate of full-time sick leave (P < 0.0005) decreased. Physical disability, anxiety, depression and stress were maintained from the 2-year follow-up until the 5-year follow-up. CONCLUSIONS: The rehabilitation program seemed to have had an effect on the participant's ability to manage with symptoms long after the end of the rehabilitation program. Most participants had returned to work, and reported less pain. The improvements made in physical disability and mental health prior to the 2-year follow-up were maintained at the 5-year follow-up occasion.

Keywords
Disability, pain, physiotherapy, sick leave
National Category
Public Health, Global Health, Social Medicine and Epidemiology Physiotherapy
Identifiers
urn:nbn:se:miun:diva-19935 (URN)10.3233/WOR-121551 (DOI)000320119400005 ()2-s2.0-84880195829 (Scopus ID)
Available from: 2013-10-08 Created: 2013-09-25 Last updated: 2017-12-06Bibliographically approved
Essner, A., Sjöström, R., Ahlgren, E. & Lindmark, B. (2013). Validity and reliability of Polar® RS800CX heart rate monitor, measuring heart rate in dogs during standing position and at trot on a treadmil. Physiology and Behavior, 114-115, 1-5
Open this publication in new window or tab >>Validity and reliability of Polar® RS800CX heart rate monitor, measuring heart rate in dogs during standing position and at trot on a treadmil
2013 (English)In: Physiology and Behavior, ISSN 0031-9384, E-ISSN 1873-507X, Vol. 114-115, p. 1-5Article in journal (Refereed) Published
Abstract [en]

Abstract

The aim of the present study was to assess criterion validity, and relative and absolute reliability of Polar® RS800CX heart rate monitor, compared to simultaneously recorded electrocardiogram (ECG) data, in measuring heart rate of dogs during standing position and at trot on a treadmill.

Methods

Heart beats from Polar® RS800CX and Cardiostore ECG were recorded simultaneously during seven continuous minutes in standing position and at trot, in 10 adult healthy dogs. Polar® data was statistically compared to ECG data for a variety of mean beats per minute (BPM), standard deviation and confidence interval. Criterion validity was calculated by Pearson product moment correlation method and intraclass correlation coefficient (ICC2.1). Relative and absolute reliability were calculated by ICC2.1, the Bland and Altman analysis and standard error of measurement (SEM and SEM%).

Results

The correlation, criterion validity, between Polar® and ECG data in standing position was r = 0.99 (p < 0.0005) and at trot r = 0.97 (p < 0.0005). Polar® data was not significantly different from ECG data. Mean difference between ECG and uncorrected Polar® data was − 0.6 BPM in standing position and − 0.6 BPM at trot. Polar® was over- and underestimating ECG data. SEM and SEM% in standing were ± 2.6 BPM and 3.0%, at trot ± 3.8 BPM and 3.1%, indicating that measurement errors were low.

Conclusion

This study showed that the criterion validity and the instrument reliability were excellent in Polar® RS800CX heart rate measuring system. The equipment seemed to be valid and reliable in measuring BPM in the dogs studied during submaximal cardiovascular conditions such as in standing position and at trot on a treadmill.

Place, publisher, year, edition, pages
Elsevier, 2013
National Category
Veterinary Science
Identifiers
urn:nbn:se:miun:diva-22282 (URN)10.1016/j.physbeh.2013.03.002 (DOI)
Available from: 2014-06-25 Created: 2014-06-25 Last updated: 2017-12-05Bibliographically approved
Sjöström, R., Asplund, R. & Alricsson, M. (2012). Back to work: evaluation of a multidisciplinary rehabilitation program with emphasis on mental symptoms; A two-year follow up. Journal of Multidisciplinary Healthcare, 5, 145-151
Open this publication in new window or tab >>Back to work: evaluation of a multidisciplinary rehabilitation program with emphasis on mental symptoms; A two-year follow up
2012 (English)In: Journal of Multidisciplinary Healthcare, ISSN 1178-2390, E-ISSN 1178-2390, Vol. 5, p. 145-151Article in journal (Refereed) Published
Abstract [en]

Background: The aim of this investigation was to analyze temporal changes in anxiety, depression, and stress in patients with musculoskeletal pain for a period of up to 2 years after a multidisciplinary rehabilitation program, in relation to sick-listing (registered with The Swedish Social Insurance Agency [Forsakringskassan] for sickness benefit). Methods: Ten persons with full-time sick leave (absence from work for medical reasons) (group 1) and 49 with part-time or no sick leave (group 2) at the end of the 2-year study period participated. It was shown in a previous study that group 1 had higher pain rating and higher subjective physical disability than group 2, with little or no improvement during and after rehabilitation. In the present study, all participants were evaluated with the Hospital Anxiety and Depression scale and a self-rated stress test. Results: Participants with full-time sick leave during the study period (group 1) showed improved stress levels but no change in anxiety and depression levels. Anxiety, depression, and stress changed more favorably in participants with part-time or no sick leave than in those with full-time sick leave. Conclusion: The results of this study indicate that investigation and appropriate treatment of psychological symptoms, including anxiety and depression, are important in multidisciplinary rehabilitation of patients with musculoskeletal disorders

Place, publisher, year, edition, pages
Dove Press, 2012
Keywords
anxiety, depression, musculoskeletal, rehabilitation, sick leave, stress
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:miun:diva-10637 (URN)10.2147/JMDH.S32372 (DOI)2-s2.0-84874783471 (Scopus ID)
Available from: 2013-04-04 Created: 2009-12-11 Last updated: 2017-12-12Bibliographically approved
Sjöström, R. & Alricsson, M. (2012). Multidisciplinary Rehabilitation in Musculoskeletal Disorders. In: Marie Alricsson (Ed.), Musculoskeletal Disorder: (pp. 1-18). InTech
Open this publication in new window or tab >>Multidisciplinary Rehabilitation in Musculoskeletal Disorders
2012 (English)In: Musculoskeletal Disorder / [ed] Marie Alricsson, InTech, 2012, p. 1-18Chapter in book (Other academic)
Place, publisher, year, edition, pages
InTech, 2012
National Category
Public Health, Global Health, Social Medicine and Epidemiology
Identifiers
urn:nbn:se:miun:diva-17223 (URN)10.5772/38158 (DOI)978-953-51-0485-8 (ISBN)
Available from: 2012-10-23 Created: 2012-10-23 Last updated: 2014-06-26Bibliographically approved
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