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- Bäcklund, Catharina, 1971-, et al.
(författare)
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Problems in enhancing physical activity among overweight and obese children
- 2010
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Konferensbidrag (refereegranskat)abstract
- Introduction: Physical inactivity is regarded as one of the main factors that have contributed to the rapid increase in prevalence of childhood obesity in recent decades. The aim of this study was to evaluate whether participation in a family-based multifactor intervention program could increase physical activity among overweight and obese children.Methods: 105 children, mean age 10.5 years (SD±1.09), with overweight and obesity living in northern Sweden were recruited and randomized into an intervention or control group. The intervention group was invited to participate in a program aiming at improving lifestyle regarding food habits and physical activity. The children’s physical activity was measured during 4 days at baseline and after 1 year with SenseWear Armband.Results: There were no statistically significant differences between the groups neither at either baseline or 1 year, regarding energy expenditure, steps/day, time being sedentary (< 3 MET), and time being active at different MET-levels. For all children, time being active ≥ 3 MET significantly decreased with 44.5 (111) min/d from baseline to 1-year. Despite the decrease in physical activity, the children were physically active ≥ 3 MET during 4.1 (1.6) h/d at 1-year.Conclusion: Physical activity decreased with increased age among overweight and obese children, despite extensive effort of intervention. To make future interventions worthwhile it is important to consider the participant’s physical activity level before entering the study, when planning and setting up the intervention program; to comprise the participant’s individual goals regarding physical activity; and to focus specifically on decreasing time being sedentary.
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- Bäcklund, Catharina, 1971-, et al.
(författare)
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Validity of measured energy expenditure in overweight and obese children when using Inner View Professional software v5.1 and 6.1 together with SenseWear Pro2 Armband
- 2009
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Ingår i: 7th International Conference on Diet and Activity Methods.
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Konferensbidrag (refereegranskat)abstract
- The aim was to investigate the validity of SenseWear Pro2 Armband (SWA) when assessing energy expenditure of overweight and obese children. A random selection of 22 children with an isoBMI>25 were recruited from 8-11 year olds participating in an intervention study. Energy expenditure in free-living condition was assessed during 14 days by using SWA. The armband was worn 24h/d, and removed only for water activities. Total energy expenditure was measured with double labelled water (DLW) method during the same period covered by SWA. During the data collection, an updated version of the software used by SWA was released and data were analysed with both software version. The validity when using software version 5.1 (SWA5.1) and 6.1 (SWA6.1) was investigated by comparison with measured energy expenditure by DLW method. In total, 11 girls and 11 boys with mean age of 10.3±0.99 years and isoBMI 22.8±0.62 participated. The average wearing time of SWA was 12 days (range 7-14) and 23.3 h/day (range 18.8-24.0). There was no statistically significant difference in mean physical activity level (PAL) by SWA5.1 compared by DLW-method. A minor non-significant underestimation of energy expenditure 0.02±1.20 MJ/day (95%CI -0.55,0.52) measured by SWA5.1 compared with DLW-method was shown. However, the children's PAL according to SWA6.1 was 1.37 compared with 1.68 according to DLW method. When assessed by SWA6.1 there was a significant underestimation of energy expenditure by 1.96±1.03MJ/day (95%CI-2.42,-1.50) compared with DLW-method. The differences between SWA5.1 andSWA6.1 may be partly explained bya statistically significant difference in the amount of time the two software versions have registered time spent on different activity levels (MET<3, MET3-<6, MET6-<9, MET≥9). When comparing time spent on sedentary activities (MET<3) significantly less time was assessed by SWA5.1 compared with SWA6.1, 18±2.1 h/d and 20±2.4 h/d respectively. These differences became more apparent at higher METs. A significantly longer time spent on activities with MET≥9, was assessed by SWA5.1 compared with SWA6.1, 11±26 min/d and 2.5±5.3 min/d respectively. In conclusion, the SWA with software v 5.1, but not with software v 6.1, is a valid device to accurately measure energy expenditure at group level in overweight and obese children during free-living condition.
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- Näslund, Annika, et al.
(författare)
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Postural adjustments during reaching in children wth severe spastic diplegia wearing Dafos
- 2007
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Ingår i: 15th International Congress of the World Confederation for Physical Therapy. - : WCPT.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- PURPOSE: The aim of this study was to investigate the coordination among reaching kinematics, ground reaction forces and muscle activity in standing in children with severe spastic diplegia wearing dynamic ankle-foot orthoses (DAFOs)and compare the results to age matched non-disabled children. RELEVANCE: Assessment and evaluation are essential because children with spastic diplegia, classified at level III-IV according to GMFCS (Gross Motor Function Classification System), often recieve DAFOs as an adjunct to physiotherapy in order to improve sitting, standing and walking. PARTICIPANTS: All children with spastic diplegia using DAFOs in a county in northern Sweden and had regular follow-ups of their ortohoses, were invited. Six participants at GMFCS level III-IV formed the study group and six age- and sex-matched children with normal motor development served as a control group. METHODS: Bilaterally ground reaction forces and the ankle muscle activity aswell as the reach hand kinematics were investigated by the means of two AMTI forceplates, surface electromyography (EMG)and two-camera optoelectronic system (ELITE). Kinematic, EMG and forceplate signals were recorded simultaniously. The children reached for a cup filled with candy while standing on two forceplates. Reflective markers were placed on the hand and cup. In this study, standing support provided by the parent on the pelvis or by contact of the non-reach hand on the table was necessary during the standing task. ANALYSIS: Because of the small participant number and the heterogeneity of the group with pronounced difficulties in locomotion, the results are presented on group as well as on subject level. RESULTS: Children with severe spastic diplegia, wearing DAFOs, demonstrated that movement quality of upward and forward reach velocity differed regarding temporal phasing and amplitudes of velocity peaks compared to the controls. Furthermore, children with severe spastic diplegia, wearing DAFOs, lacked a coordinated muscle activity pattern and make use of postural adjustments characterized by co-activation of agonist and antagonist muscles. However, the controls demonstrated coordinated muscle activity and an interplay of the ground reaction forces on reach and non-reach side. CONCLUSIONS: In conclusion DAFOs appear to provide some benefit for children with spastic diplegia GMFCS, level III-IV, by the use of postural adjustments for balance control during a reaching movement in standing. An intervention study would be of interest, to assess whether DAFOs could be valuable in the learning of processes considering postural adjustments , since postural control is a result of both maturation and learning. IMPLICATIONS: Children with severe spastic diplegia wearing DAFOs can despite different support conditions practice reaching while standing and thereby promote motor learning of postural adjustments to improve the ability to use the hands in daily standing activities.
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