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Blomqvist, Sven, UniversitetslektorORCID iD iconorcid.org/0000-0002-2995-4428
Publikationer (10 of 13) Visa alla publikationer
Connick, M. J., Beckman, E., Vanlandewijck, Y., Malone, L. A., Blomqvist, S. & Tweedy, S. M. (2018). Cluster analysis of novel isometric strength measures produces a valid and evidence-based classification structure for wheelchair track racing. British Journal of Sports Medicine, 52(17), 1123-1129, Article ID 097558.
Öppna denna publikation i ny flik eller fönster >>Cluster analysis of novel isometric strength measures produces a valid and evidence-based classification structure for wheelchair track racing
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2018 (Engelska)Ingår i: British Journal of Sports Medicine, ISSN 0306-3674, E-ISSN 1473-0480, Vol. 52, nr 17, s. 1123-1129, artikel-id 097558Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

BACKGROUND: The Para athletics wheelchair-racing classification system employs best practice to ensure that classes comprise athletes whose impairments cause a comparable degree of activity limitation. However, decision-making is largely subjective and scientific evidence which reduces this subjectivity is required.

AIM: To evaluate whether isometric strength tests were valid for the purposes of classifying wheelchair racers and whether cluster analysis of the strength measures produced a valid classification structure.

METHODS: Thirty-two international level, male wheelchair racers from classes T51-54 completed six isometric strength tests evaluating elbow extensors, shoulder flexors, trunk flexors and forearm pronators and two wheelchair performance tests-Top-Speed (0-15 m) and Top-Speed (absolute). Strength tests significantly correlated with wheelchair performance were included in a cluster analysis and the validity of the resulting clusters was assessed.

RESULTS: All six strength tests correlated with performance (r=0.54-0.88). Cluster analysis yielded four clusters with reasonable overall structure (mean silhouette coefficient=0.58) and large intercluster strength differences. Six athletes (19%) were allocated to clusters that did not align with their current class. While the mean wheelchair racing performance of the resulting clusters was unequivocally hierarchical, the mean performance of current classes was not, with no difference between current classes T53 and T54.

CONCLUSIONS: Cluster analysis of isometric strength tests produced classes comprising athletes who experienced a similar degree of activity limitation. The strength tests reported can provide the basis for a new, more transparent, less subjective wheelchair racing classification system, pending replication of these findings in a larger, representative sample. This paper also provides guidance for development of evidence-based systems in other Para sports.

Nyckelord
athletics, disability, elite performance, strength, wheelchair
Nationell ämneskategori
Idrottsvetenskap
Identifikatorer
urn:nbn:se:hig:diva-25732 (URN)10.1136/bjsports-2017-097558 (DOI)000443598200010 ()29175826 (PubMedID)2-s2.0-85044977061 (Scopus ID)
Anmärkning

Funding agencies:

International Paralympic Committee

Zayhed Higher Organisation for Humanitarian Care and Special Needs

Tillgänglig från: 2017-12-05 Skapad: 2017-12-05 Senast uppdaterad: 2018-09-24Bibliografiskt granskad
Blomqvist, S., Ervasti, P.-E. & Elcadi, G. H. (2018). Evaluating physical workload by position during match in elite bandy. Journal of Strength and Conditioning Research, 32(9), 2616-2622
Öppna denna publikation i ny flik eller fönster >>Evaluating physical workload by position during match in elite bandy
2018 (Engelska)Ingår i: Journal of Strength and Conditioning Research, ISSN 1064-8011, E-ISSN 1533-4287, Vol. 32, nr 9, s. 2616-2622Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

To improve current understandings of physical Workload (WL) in elite Bandy, ten bandy players were monitored for heart rate (HR) during thirteen matches over one championship season. Participants were divided into five subgroups according to playing position - libero, defender, halves, midfielder and forward. HR measurements were analyzed with two different methods to compute physical WL - (i) percentage of total time spent in different HR zones (HRres) and (ii) WL based on the Edwards method. Also determined was the time spent at HR levels above the lactate threshold (LT). A one-way ANOVA was used for analysis. For WL according to the Edwards method, significant differences (p=0.05) were shown between groups with defenders presenting the highest scores and forwards and liberos the lowest. A significant difference (p=0.05) was found between liberos and halves and the other positions as to how much time they spent in zone 70-80% of HRres. In 91-100% of HRres there was a distinct difference between defenders and the other positions and also forwards differed significantly from liberos, defenders and halves (p=0.05). The libero spent only one percent of the time over the LT, whereas the midfielder spent about 27% of the time over the LT. Overall, defenders showed the greatest WL during a match and liberos the lowest. The practical implications of these findings can help coaches and trainers design training methods specific to each position as well as individualized training sessions for each player in elite bandy.

Nationell ämneskategori
Idrottsvetenskap
Identifikatorer
urn:nbn:se:hig:diva-26388 (URN)10.1519/JSC.0000000000002551 (DOI)000454031400027 ()29489729 (PubMedID)2-s2.0-85056289580 (Scopus ID)
Tillgänglig från: 2018-04-03 Skapad: 2018-04-03 Senast uppdaterad: 2019-01-07Bibliografiskt granskad
Blomqvist, S., Van Biesen, D. & Vanlandewijck, Y. (2018). Gear selection between techniques in freestyle cross-country skiing in athletes with intellectual impairment: A pilot study. International journal of sports science & coaching, 13(6), 1150-1155
Öppna denna publikation i ny flik eller fönster >>Gear selection between techniques in freestyle cross-country skiing in athletes with intellectual impairment: A pilot study
2018 (Engelska)Ingår i: International journal of sports science & coaching, ISSN 1747-9541, E-ISSN 2048-397X, Vol. 13, nr 6, s. 1150-1155Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Cross-country skiing is a fast-paced, a cognitively demanding, and a popular sport within international organizationsincluding athletes with intellectual impairment (II); however, research on how the level of II affects skiing performanceis limited. The aim of this exploratory study was to compare differences in the overall performance (segment time and racetime) and gear selection between a sample of cross-country skiers with II (n¼22) and a control group of skiers without II(n¼12), during a competitive 10 km freestyle race. The groups were matched on training background and skiing level basedon interviews with coaches and trainers. The independent samples t-test revealed a higher velocity in the first segment forthe control group (6.100.62 m/s) compared to the skiers with II (5.500.56 m/s; p<0.05), but no significant differencesin total race time between the groups. With respect to their ability to effectively select gears during the races, there was asignificant difference between the groups, where the pattern was that skiers with II used a lower gear compared to theskiers without II and that pattern became even more apparent towards the second half of the race. These findings supportthe assumption that impaired cognitive function may constrain the ability to optimally select the appropriate gear infunction of the characteristics of the skiing track, which is a key determinant of skiing performance.

Nyckelord
Classification, cognitive functioning, intellectual disability, Nordic skiing, Paralympics
Nationell ämneskategori
Idrottsvetenskap
Identifikatorer
urn:nbn:se:hig:diva-28593 (URN)10.1177/1747954118798233 (DOI)000452267900036 ()2-s2.0-85057034077 (Scopus ID)
Tillgänglig från: 2018-11-22 Skapad: 2018-11-22 Senast uppdaterad: 2019-01-07Bibliografiskt granskad
Blomqvist, S., Wester, A., Lönnberg, L., Sundelin, G. & Rehn, B. (2017). Physical exercise frequency seem not to influence postural balance but trunk muscle endurance in young persons with intellectual disability. Journal of Physical Education and Sports Management, 4(2), 38-47
Öppna denna publikation i ny flik eller fönster >>Physical exercise frequency seem not to influence postural balance but trunk muscle endurance in young persons with intellectual disability
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2017 (Engelska)Ingår i: Journal of Physical Education and Sports Management, ISSN 2373-2156, E-ISSN 2373-2164, Vol. 4, nr 2, s. 38-47Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Background The influence of various physical exercise frequencies on postural balance and muscle performance among young persons with intellectual disability (ID) is not well understood.

Method Cross-sectional data from 26 elite athletes were compared with 37 students at a sports school and to 57 students at a special school, all diagnosed with mild to moderate ID and with different exercise frequencies. Data were also compared with a group of 149 age-matched participants without ID.

Results There were no significant differences in postural balance between young ID groups regardless of physical exercise frequency, all of them had however impaired postural balance compared to the non-ID group. The group with high exercise performed better than the other ID groups in the trunk muscle endurance test.

Conclusions It appears as if physical exercise frequency don’t improve postural balance but endurance in the trunk muscles for young persons with ID.

Nyckelord
mental retardation, young, teenager, postural control, strength
Nationell ämneskategori
Idrottsvetenskap Sjukgymnastik
Identifikatorer
urn:nbn:se:hig:diva-25924 (URN)10.15640/jpesm.v4n2a5 (DOI)
Tillgänglig från: 2018-01-03 Skapad: 2018-01-03 Senast uppdaterad: 2018-06-27Bibliografiskt granskad
Elcadi, G. H., Tsaklis, P., Blomqvist, S., Ervasti, P.-E., W. Söderström, M., Forsman, M. & Richter, H. (2016). A Strong Correlation Between Dorsolateral Prefrontal Cortex And Vastus Lateralis Activity During Running To Fatigue. Paper presented at Annual Meeting of the American-College-of-Sports-Medicine (ACSM), 31 May - 4 June 2017, Boston, MA, USA. Medicine and science in sports and exercise, 48(5), 854-854
Öppna denna publikation i ny flik eller fönster >>A Strong Correlation Between Dorsolateral Prefrontal Cortex And Vastus Lateralis Activity During Running To Fatigue
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2016 (Engelska)Ingår i: Medicine and science in sports and exercise, ISSN 0195-9131, Vol. 48, nr 5, s. 854-854Artikel i tidskrift, Meeting abstract (Refereegranskat) Published
Abstract [en]

Fatigue is a phenomenon of pronounced importance in sports. Recently, there is strong evidence of interplay between the prefrontal cortex and motor output during fatiguing contractions. The dorsolateral prefrontal cortex (DLPC) due to its large involvement in cognitive and motor activities is believed to be involved but this requires physiological clarification. AIM: We investigated the relationship between DLPC activity - responses in oxyhemoglobin (HbO2) and total hemoglobin (HbT) measured by near-infrared spectroscopy (NIRS), and the vastus lateralis muscle (VL) activity - quantified as root-mean-square (RMS) of the EMG signal, during a fatigue protocol.

METHODS: Four male runners (32±12 yrs) with probes for NIRS over the DLPC and EMG over the VL performed a track running test at a constant speed to fatigue (exhaustion). The running speed was individually determined as the average speed of a 1200-m time trial performed ~3 days prior to testing. For NIRS changes in μmole/L of HbO2 and HbT were computed. The VL EMG-RMS of the contraction of each step was normalized as a percent of a submaximal reference contraction (%RMS), thus removing the non-activity between steps. Data of 10s epochs at 20, 40, 60, 80 and 100% of time for each lap were averaged for analyses. Regression analyses performed with HbO2 and with HbT as dependent variables and %RMS as the independent variable.

RESULTS: Over time there was an increase in HbO2 and HbT in the DLPC, and in VL-%RMS. Both HbO2 and HbT correlated strongly with EMG-RMS during running to fatigue (see figures below); p<0.001 for both.

CONCLUSION: The strong relationship between DLPC and VL activities during running to fatigue suggests the involvement of the DLPC in the central processing of fatigue.

Nationell ämneskategori
Idrottsvetenskap Tillämpad psykologi
Identifikatorer
urn:nbn:se:hig:diva-22135 (URN)10.1249/01.mss.0000487560.58653.96 (DOI)000415211700135 ()
Konferens
Annual Meeting of the American-College-of-Sports-Medicine (ACSM), 31 May - 4 June 2017, Boston, MA, USA
Tillgänglig från: 2016-07-08 Skapad: 2016-07-08 Senast uppdaterad: 2018-12-03Bibliografiskt granskad
Larsson, A., Rehn, B. & Blomqvist, S. (2016). Muscle function among healthy adult athletes before and after a postural balance training period. Jacobs Journal of Sports Medicine, 3(2), Article ID 021.
Öppna denna publikation i ny flik eller fönster >>Muscle function among healthy adult athletes before and after a postural balance training period
2016 (Svenska)Ingår i: Jacobs Journal of Sports Medicine, ISSN 2376-9432, Vol. 3, nr 2, artikel-id 021Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Background: Postural balance training is primarily used by athletes as rehabilitation after previous injuries or for prevention. A few studies have been made with the aim of investigating whether postural balance training can improve other physical functions in healthy participants. However, there is no consensus regarding effects.

Objective: The aim of this study was to investigate whether postural balance training can improve muscle function in healthy adult athletes.

Method: Seventeen healthy adult (6 males and 11 females) athletes between the ages of 21 and 50 years performed three postural balance exercises once a day 3x30 seconds per exercise on each leg. This intervention was performed daily for six weeks. Their muscle function were assessed with squat jump, heel rise and grip strength (control). Evaluation was done before and after the training period.

Results: Jump height, number of repetitions in heel rise and duration in standing on one leg increased with statistical significance. There were no improvements in postural sway and grip strength.

Conclusion: The results suggest that a postural balance training period can provide a better local muscle function regarding explosive strength and endurance among adult athletes even if postural sway is not affected.

Nyckelord
Muscle strength, Equilibrium, Exercise, Physical examination
Nationell ämneskategori
Idrottsvetenskap
Identifikatorer
urn:nbn:se:hig:diva-23975 (URN)
Tillgänglig från: 2017-05-04 Skapad: 2017-05-04 Senast uppdaterad: 2018-09-07Bibliografiskt granskad
Sundahl, L., Zetterbreg, M., Wester, A., Rehn, B. & Blomqvist, S. (2016). Physical activity levels among adolescent and young adults women and men with and without intellectual disability. JARID: Journal of applied research in intellectual disabilities, 29(1), 93-98
Öppna denna publikation i ny flik eller fönster >>Physical activity levels among adolescent and young adults women and men with and without intellectual disability
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2016 (Engelska)Ingår i: JARID: Journal of applied research in intellectual disabilities, ISSN 1360-2322, E-ISSN 1468-3148, Vol. 29, nr 1, s. 93-98Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Background

As physical activity can prevent overweight and promote general health, the aim was to investigate the amount of physical activity among adolescent and young adult women and men with intellectual disability (ID), compared to age-matched control groups without intellectual disability. A further aim was to examine whether physical activity level was associated with the body mass index (BMI).

Materials and methods

Fifty-two adolescent and young adult women and men with intellectual disability and 48 without intellectual disability, between the ages 16 and 20 years, BMIs ranging from 16.3 to 50.3 kg/m2, were measured for number of steps taken with a pedometer for five consecutive days (Sunday–Thursday).

Results

The only group to meet recommendations regarding number of steps (10 000–12 000/day) was women without intellectual disability. No significant associations were found between total number of steps taken and BMI.

Conclusion

As the majority of adolescents and young adults with intellectual disability, especially women, did not reach recommended activity levels regardless of their BMIs, this call for broad measures to increase physical activity.

Nyckelord
mental retardation, motor activity, teenagers, youths
Nationell ämneskategori
Idrottsvetenskap Sjukgymnastik Folkhälsovetenskap, global hälsa, socialmedicin och epidemiologi
Identifikatorer
urn:nbn:se:hig:diva-21004 (URN)10.1111/jar.12170 (DOI)25940840 (PubMedID)2-s2.0-84958860194 (Scopus ID)
Tillgänglig från: 2016-01-12 Skapad: 2016-01-12 Senast uppdaterad: 2018-03-13Bibliografiskt granskad
Blomqvist, S. & Rehn, B. (2015). Fysisk aktivitet och hälsa för personer med utvecklingsstörning. Fysioterapi (1), 26-31
Öppna denna publikation i ny flik eller fönster >>Fysisk aktivitet och hälsa för personer med utvecklingsstörning
2015 (Svenska)Ingår i: Fysioterapi, ISSN 1653-5804, nr 1, s. 26-31Artikel i tidskrift (Övrigt vetenskapligt) Published
Abstract [sv]

Hälsa är en förutsättning för att kunna förverkliga sina mål i livet. Personer med utvecklingsstörning, cirka 90 000 i Sverige, har nedsatt hälsa jämfört med personer utan utvecklingsstörning och det leder till att denna grupp har svårare att uppfylla sina mål. Personer med utvecklingsstörning drabbas i större utsträckning av övervikt, typ 2-diabetes, hjärt- och kärlsjukdomar, högt blodtryck, benskörhet och depression. Undersökningar visar också på nedsatt fysisk aktivitet, motorik, syreupptagningsförmåga, muskelstyrka och postural balans hos denna grupp. Dessa sjukdomar och nedsatta förmågor går att påverkai positiv riktning med fysisk aktivitet. Fysioterapeuter som har bred kunskap om hälsa och anpassning av fysisk aktivitet kan vara till stor hjälp vid prevention, bedömning och träning.

Nyckelord
utvecklingsstörning, hälsa, fysisk aktivitet
Nationell ämneskategori
Folkhälsovetenskap, global hälsa, socialmedicin och epidemiologi Idrottsvetenskap Sjukgymnastik
Identifikatorer
urn:nbn:se:hig:diva-21006 (URN)
Tillgänglig från: 2016-01-12 Skapad: 2016-01-12 Senast uppdaterad: 2018-12-03Bibliografiskt granskad
Blomqvist, S., Wester, A. & Rehn, B. (2014). Postural muscle responses and adaptations to backward platform perturbations in young people with and without intellectual disability. Gait & Posture, 39(3), 904-908
Öppna denna publikation i ny flik eller fönster >>Postural muscle responses and adaptations to backward platform perturbations in young people with and without intellectual disability
2014 (Engelska)Ingår i: Gait & Posture, ISSN 0966-6362, E-ISSN 1879-2219, Vol. 39, nr 3, s. 904-908Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

This study examines postural muscle responses to backward perturbations in young people (16-20 years) with and without intellectual disability (ID). The study included 56 young people with ID and 43 age-matched without ID volunteers. The subjects stood on a platform that was moved backwards in a surface translation. Lower and upper leg muscles and lower back spine muscles were recorded with surface electromyography (EMG). Muscle onset latency, time to peak amplitude (EMG), adaptation of muscle responses to repeated perturbations (using integrated EMG (IEMG) for epochs), and synergies and strategies were assessed. The result showed no differences between the two groups in muscle onset latency, synergies, and strategies. Young people with ID reduced their time to peak amplitude in investigated muscles, a response that was different from the group without ID. Also, young people with ID tended to adapt their IEMG less compared to the controls. These findings suggest that young people with ID have limited ability to use somatosensory information and adapt their postural muscle responses to repeated external perturbations.

Nyckelord
Balance perturbations, EMG, Mental retardation, Postural control, Young adults
Nationell ämneskategori
Övrig annan medicin och hälsovetenskap
Identifikatorer
urn:nbn:se:hig:diva-18188 (URN)10.1016/j.gaitpost.2013.11.018 (DOI)000332960600013 ()24373785 (PubMedID)2-s2.0-84895891407 (Scopus ID)
Tillgänglig från: 2014-11-26 Skapad: 2014-11-26 Senast uppdaterad: 2018-03-13Bibliografiskt granskad
Blomqvist, S., Wester, A., Persson, E., Sundkvist, H., Sundelin, G. & Rehn, B. (2014). Postural stability, physical activity, aerobic capacity and their associations for young people with and without intellectual disabilities. European Journal of Adapted Physical Activity, 7(1), 22-30
Öppna denna publikation i ny flik eller fönster >>Postural stability, physical activity, aerobic capacity and their associations for young people with and without intellectual disabilities
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2014 (Engelska)Ingår i: European Journal of Adapted Physical Activity, ISSN 1803-3857, E-ISSN 1803-3857, Vol. 7, nr 1, s. 22-30Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Previous studies show that people with intellectual disability (ID) appear to have impaired postural stability, a lower level of physical activity, and lower aerobic capacity compared to persons without ID, limitations that could affect their health. This study investigates these physical functions and their associations in a group of young people with ID compared to an age-matched group without ID. In total, this cross-sectional study included 106 high school students (16-20 years): 57 students with mild to moderate ID and 49 age-matched students without ID (control group). Tests were performed for postural stability, level of physical activity, and aerobic capacity. Both females and males with ID had significantly lower estimated maximum oxygen uptake (l O2/min) (p< 0.001 for females and p=0.004 for males) and a lower aerobic capacity expressed relative to body weight (ml O2/ kg*min) (p< 0.001 for females and p=0.012 for males) compared to age-matched peers. Analyses of associations were made using the Pearson’s correlation coefficient and multivariate linear regression analysis. No significant associations could be found. Physical status appears impaired for young people with ID and functions, such as postural stability, should be evaluated separately.

Nyckelord
Mental retardation, physical capacity, motor activity, postural equilibrium, youth, teenagers
Nationell ämneskategori
Övrig annan medicin och hälsovetenskap
Identifikatorer
urn:nbn:se:hig:diva-18192 (URN)
Tillgänglig från: 2014-11-26 Skapad: 2014-11-26 Senast uppdaterad: 2018-09-07Bibliografiskt granskad
Organisationer
Identifikatorer
ORCID-id: ORCID iD iconorcid.org/0000-0002-2995-4428

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