Load, capacity and health: critical pieces of the holistic performance puzzle [Editorial]

Relationships between load, load capacity, performance and health are topics of contemporary interest. At what intensity should an athlete train to achieve the best physiological response? How much (or little) can an athlete train without detrimentally affecting health? Most studies addressing such questions have used a reductionist approach wherein factors were studied in isolation, thereby ignoring the complex inter-relationships and balance between factors. This editorial discusses the association between load and load capacity, and their relationship with athlete performance and health. We illustrate the practical use of a model for the management of athlete performance and health, and provide directions for future practice and research