絆 · Free Assessment
What's your Durability Score?
Eight quick questions. See how built-to-last you are across training, nutrition, sleep and recovery — and the one lever that will move you fastest.
Training · 1 of 80%
How consistent is your training, week to week?
The Durability Index is Kizuna's north-star metric. This is the self-rated version — your coach computes the real one from your logged training and wearable data.