In conclusion, the Balance Master showed fair to good reliability for most postural parameters in 9 to 10 year olds. The current data on postural control in children aged 9 to 10 years are relevant for research in other domains within the clinical field, like obesitas and developmental coordination disorder or in relation to back pain prevalence at early age.
Promoting a physically active lifestyle whilst optimizing the spinal load at a young age seems to be advocated within the scope of early back pain prevention efforts. The present study aimed at evaluating the effects of combining a back care program with a physical activity promotion program in elementary schoolchildren. In a pre-post design over two school years, back care knowledge, back care behavior, fear avoidance beliefs and back pain reports were evaluated in children classified into three categories--those who received a back care and a physical activity promotion program (n=190), those who received only a back care program (n=193) and those in a control group (n=172) (mean age at baseline: 9.7 years+/-0.7). Physical activity levels were evaluated in a sub-sample of 26 pupils in each group. The back care program and the physical activity promotion program were both comprehensive ones. In both intervention groups, the scores for back care related knowledge and back care behavior were significantly higher than the control group. The increase in the sum score for back care behavior was significantly higher in the back care group than in the back care plus physical activity promotion group. Significant interaction effects showed an increase in fear-avoidance beliefs between pre- and post-tests in the control group, significantly different from the better scores in both intervention groups. Interaction effects were not significant for pain reports. In the back care plus physical activity promotion group, the daily moderate to vigorous physical activity levels decreased by 8 min per day while a decrease by 31 min per day was found in the back care group and a decrease by 36 min per day in the control group. However, group differences were not significant. The present study findings favor the addition of a physical activity promotion program to a back care program in elementary schools within the scope of early back pain prevention efforts. However, the findings also emphasize the disadvantages of implementing both programs simultaneously in a school curriculum that is already full.
The intervention resulted in improved postural aspects related to spinal loading. The long-term effect of improved postural behavior at young age on back pain prevalence later in life is of interest for future research.
Within the scope of primary prevention regarding back functioning in children, research on the stability of intervention effects is indispensable. Along this line, the transition from childhood to adolescence is an important phase to evaluate the potential stability of intervention effects because of the typically mechanical and psychological demands related to adolescence. The main aim of the current study was to investigate the effects of a back education program at 2-year follow-up, in youngsters aged 13-14 years, on back posture knowledge, fear-avoidance beliefs and self-reported pain. An additional purpose was to evaluate which aspects of postural behavior were integrated in youngsters' lifestyles. At 2-year followup, the study sample included 94 secondary schoolchildren in the intervention group (mean age 13.3 ± 0.8 years) and 101 controls (mean age 13.2 ± 0.7 years). The back posture program that had been implemented for two school years consisted of back education and the stimulation of postural dynamism in the class through support and environmental changes. A questionnaire was completed comparable to the pretest, posttest and follow-up evaluations. The current study demonstrated at 2-year follow-up stability of the improved general (F = 1.590, ns) and specific (F = 0.049, ns) back posture knowledge in children who had received early back posture education. Back posture education did not result in increased fearavoidance beliefs (F = 1.163, ns) or mounting back and/or neck pain reports (F = 0.001, ns). Based on selfreports for postural behavior, youngsters who had received the back posture program in the elementary school curriculum integrated crucial sitting and lifting principles conform to biomechanical favorable postural behavior. The steady intervention effects 2-year postintervention demonstrated that intensive back posture education through the elementary school curriculum is effective till adolescence. Future research on the impact of early school-based back posture promotion in relation to the integration of back posture principles according to a biomechanical favorable lifestyle and back pain prevalence later in life is essential.
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