export type StrideSex = 'male' | 'female' | 'neutral';
export interface StrideEstimateInput {
    heightM: number;
    sex?: StrideSex;
    /** Optional measured speed (m·s⁻¹) for speed-adjusted stride (Höök et al. 2019 scaling). */
    speedMps?: number;
}
/**
 * Estimate stride length (m) from stature.
 * Baseline: anthropometric walking stride ≈ 0.41–0.415 × height.
 */
export declare function estimateStrideMeters(input: StrideEstimateInput): number;
export declare function distanceFromSteps(steps: number, strideM: number): number;
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