Letter to the Editor: Clinical impact of normative data in ankle strength evaluation

Table 1 Normative ankle strength values and symmetry thresholds

Parameter	Normative value (healthy adults)	Clinical interpretation
Peak torque - evertors/inverters	Approximately 88.8% balance	Indicates near-symmetrical agonist-antagonist strength
Peak torque - dorsiflexors/plantar flexors	Approximately 36.1% balance	Reflects expected ratio of ankle mobility vs power muscles
Limb symmetry index	≥ 90%	Empirically validated threshold for return-to-activity considerations
Muscular deficiency index	≥ 90% composite bilateral symmetry	Provides multi-metric bilateral assessment across torque/power/work
Gender differences	Men > women (all strength metrics)	Necessitates gender-specific normative charts