Skills decay without practice - that's why CrossFit constantly varies movements. Someone with only 12 ring muscle-up sessions will struggle even if they practiced yesterday, while someone with 200+ double under sessions maintains competence even after months off. Recency alone doesn't tell the full story - accumulated volume creates lasting skill.Practice Score combines recency, volume, and consistency to identify movements needing attention. The algorithm reflects how CrossFit skills actually develop: through accumulated volume over time, not just recent exposure. Movements with low lifetime volume need dedicated practice sessions, not just warm-up touches.Focus on movements with low scores - they need dedicated practice sessions to build competence. High-volume movements maintain themselves through WODs, but technical skills require intentional work.