In recent years, the increased demands of both training and competition have heightened the need of load monitoring among soccer players. However, adopting metrics that comprehensively capture the intricacies of neuromuscular fatigue remains a challenge. Assessing low-frequency fatigue may contribute to fill this gap, as it provides an objective measure to evaluate muscle function readiness. Thus, the aim of this study was to examine whether variability in low-frequency fatigue morning scores are related to training external load acute changes throughout the in-season microcycle.

Inclusion Criteria:

• elite soccer players

Exclusion Criteria:

• injured athletes

Elite soccer players competing at the highest national level