Relevance of Isometric Strength Assessments in Sports

Background: Isometric tests quantify force under controlled conditions, but reliable measurements do not necessarily lead
to defensible coaching decisions. Objective: This critical narrative review examines how isometric peak force and timedependent measures can inform athlete monitoring without being mistaken for direct measures of sport performance.
Approach: Selected primary studies and methodological reviews are critically interpreted; no systematic search or metaanalysis is claimed. Contribution: A six-stage decision-accountability framework links a predefined coaching question to test
choice, data-quality checks, uncertainty-aware interpretation, documented action and reassessment. Unlike existing testing
guidance, the framework treats disagreement between isometric and dynamic outcomes, as well as the consequences of a
decision, as reasons to review the original interpretation. Application: A hypothetical example illustrates why an observed
increase in peak force may not justify an immediate programme change. Conclusion: The framework offers a transparent
and testable way to organise judgement, but its effectiveness has not been empirically established.