Developmental coordination disorder in schoolchildren is a hidden problem in Spain. The impact of this condition on the emotional, social and physical dimensions of children's development has been demonstrated and awareness of its effects and prevalence should be increased. In this article we analyze the characteristics of this disorder, its possible causes, and its effects, with the aim of demonstrating the need for early intervention to remedy its consequences, and specifically children's physical fitness, since children with these difficulties tend to be sedentary and abstain from physical activity. In conclusion, we emphasize that developmental coordination disorder is not exclusively an educational problem, but is also a health problem, and that all adults involved in the child's education should be involved in its solution.