High school students have a low level of specific knowledge. Back care education in the school curriculum is recommended.

To study the effect of an educational intervention programme concerning knowledge and postural habits for back health on a group of 10 to 11-year-old students. Two groups of 5 th grade primary school students were selected. A control group (CG) (n=16), and an experimental group (EG) (n=16) who developed a back-health educational programme. A follow-up was carried out one month after the end of the intervention. The proposed educational intervention improved the results of both the knowledge and postural habits of the participants. The increase in the level of knowledge concerning health and back care in the daily lives of the EG (x̅ =6.32) was significantly greater than that observed in the CG (x̅ =3.86), with a high effect size (U = 29.500; Z = -3.717; p <0.001, r = 0.66). In daily postural habits, the EG (x̅ = 88.38) also increased their score significantly (U= 7.50; Z = -4.55; p <0.001, r = 0.80) compared to the CG (x̅ = 74.88). In both knowledge and postural habits, the scores increased in the intervention. The educational intervention programme studied improves both knowledge and postural habits for back health of the 5th grade students participating in the study. The Physical Education class seems to be an ideal environment to develop back health educational programmes.

Purpose The most relevant musculoskeletal problems are related with back health. Study instruments have been designed for adult patient population but not for school-aged children. The aim of this study was to develop and evaluate the psychometric properties of a questionnaire to assess adolescents' level of back care knowledge in daily life physical activities. Methods Participants were 171 adolescents from secondary schools. The questionnaire was made up of 24 questions. A Delphi method was used for test validation. Cronbach's alpha, test-retest, Wilcoxon signed-rank and Bland-Altman graph were used to evaluate the instrument reliability. Results Cronbach's alpha (a = 0.82) showed a strong internal consistency. Test-retest was excellent for total score (0.76) and moderate to excellent (0.54-0.76) for seven score conceptual categories with good results of standard error of the mean and minimal detectable change. No differences were found between test 1 and test 2 except for the standing posture scores. ConclusionThe questionnaire showed acceptable psychometric values. Results showed that this questionnaire is a good instrument to assess adolescent's back care knowledge.

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It is well-known that low back pain (LBP) prevalence is high among school-age children. However, literature concerning the initial onset of back pain between the ages of three and eleven years is scarce. The present study aims to analyze the prevalence of LBP in kindergarten and primary school students. A total of 278 (9.9 ± 2.1 years old; 52.2% girls) students from two public kindergartens and primary schools in Valencia (Spain) participated in this cross-sectional study. The Nordic questionnaire on LBP was used to assess the onset and duration of LBP symptoms. The lifetime prevalence of LBP was 47.5% (n = 132), the last year’s prevalence was 44.2% (n = 123), and last week’s prevalence was 18.8% (n = 50). Boys and girls reported a lifetime prevalence of 52.3% (n = 64) and 47.7% (n = 63) (p = 0.186, Fisher’s exact test, 2-sided), respectively. By age group, lifetime episodes of LBP became more prevalent with increasing age (p < 0.001, Fisher’s exact test, 2-sided). In summary, our findings show that LBP increases with age and further strengthens the evidence that LBP onset could start as young as 10 years of age.