scholarly journals Dietary calcium intake and risk of fracture and osteoporosis: prospective longitudinal cohort study

BMJ ◽  
2011 ◽  
Vol 342 (may24 1) ◽  
pp. d1473-d1473 ◽  
Author(s):  
E. Warensjo ◽  
L. Byberg ◽  
H. Melhus ◽  
R. Gedeborg ◽  
H. Mallmin ◽  
...  
Keyword(s):  
Cohort Study ◽  
Calcium Intake ◽  
Dietary Calcium ◽  
Longitudinal Cohort Study ◽  
Dietary Calcium Intake ◽  
Longitudinal Cohort ◽  
Risk Of Fracture ◽  
Prospective Longitudinal ◽  
Prospective Longitudinal Cohort

scholarly journals Changes in rearfoot strike patterns over childhood

Kinesiology ◽  
2021 ◽  
Vol 53 (2) ◽  
pp. 336-342
Author(s):  
Pedro Ángel Latorre Román ◽  
Juan Antonio Párraga Montilla ◽  
Jeśús Salas Sánchez ◽  
Pedro José Consuegra González
Keyword(s):  
Cohort Study ◽  
Stress Wave ◽  
Age Groups ◽  
The Body ◽  
Longitudinal Cohort Study ◽  
Transient Stress ◽  
Longitudinal Cohort ◽  
Impact Forces ◽  
Prospective Longitudinal ◽  
Prospective Longitudinal Cohort

Rearfoot strike (RFS) in children running produces impact forces that give rise to a transient stress wave traveling through the body. It could contribute to the development of injuries. The purpose of this study was to determine RFS prevalence during childhood while running at a self-selected velocity in a prospective longitudinal cohort study. A total of 175 children (68 girls), aged 6 to 14 years, participated in this study. The sample was divided into three age groups (age in 2016): 6-8 years, 9-11 years, and 12-14 years which were analysed three years later (2019). 2D video-based was used to record the RFS Taking into account all samples, in the jogging trial the prevalence of RFS (an average of both feet) was 86.9% in 2016 and 94.7% three years later; in the running trial the prevalence was 82.6 and 94.4%, respectively. In all samples a significant increase of RFS prevalence was found in both the jogging and running trials for both feet over three years (jogging, left foot, p=.011, right foot, p=.023; running, left foot, p=.001, right foot, p<.001). In girls, there were no significant differences in any conditions. In boys, a significant increase of RFS prevalence was found after three years in both feet (p<.01) in the running trial. This study shows that RFS prevalence in children increases with age and the results may be used to characterize typical running development in children population.

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