『Reactive Strength Index vs Dynamic Rebound Index - Is RSI a Dead Metric?』のカバーアート

Reactive Strength Index vs Dynamic Rebound Index - Is RSI a Dead Metric?

Reactive Strength Index vs Dynamic Rebound Index - Is RSI a Dead Metric?

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概要

The Reactive Strength Index (RSI = jump height ÷ contact time) is the standard field metric for assessing the stretch–shortening cycle (SSC) — the store-and-release elastic energy mechanism behind explosive movement. But RSI has real problems: it mixes incompatible units (producing m/s despite being treated as dimensionless), it ignores drop height entirely, and it rewards very short contact times even when almost no upward impulse is produced.

The Proposed Solution: DRI

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