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contact time

Flight-to-Contact Ratio: Diagnosing Whether a Jump Problem Is Slow Contact or Low Flight
guides·9 min read

Flight-to-Contact Ratio: Diagnosing Whether a Jump Problem Is Slow Contact or Low Flight

RSI dropped, but why? Split flight time from ground contact time to tell slow contact from low flight before you pick a fix.

RSI·flight-time·contact-time
10/5 Repeated Jump Test: How to Calculate RSI (Protocol)
how to·8 min read

10/5 Repeated Jump Test: How to Calculate RSI (Protocol)

Want a reliable reactive strength number without force plates? Follow this 10/5 jump protocol: setup, RSI calculation, benchmarks, and reliability data.

reactive-strength-index·RSI·repeated-jump-test
How to Test Reactive Strength Index Protocol
how to·8 min read

How to Test Reactive Strength Index Protocol

The RSI drop jump protocol in five steps: contact-time cutoffs, the calculation formula, and sport benchmarks so you know if your number is actually good.

reactive-strength-index·RSI·drop-jump