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Apple Health metrics › Double Support Time
Double Support Time on Apple Watch and iPhone
The share of each step with both feet on the ground, a balance and gait indicator.
Where to find itHealth app > Browse > Mobility > Double Support Time
What it is
Double support time rises when people walk more carefully. It is one of the gait signals used in fall-risk research.
How Apple measures it
iPhone estimates it from motion sensors during steady walking and reports a percentage of the gait cycle.
What's a normal range?
Typical adults land around 20 to 40%, and it rises with age, caution or balance issues.
What moves it
- Age
- Balance and strength
- Walking speed
- Fear of falling
- Terrain
See Double Support Time next to your other vitals
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Get OnlyVitals on the App StoreFrequently asked questions
What is double support time?
The portion of your stride where both feet touch the ground. More double support usually means a more cautious gait.
What is a normal double support percentage?
About 20 to 40% for most adults, with higher values common in older age.
Related metrics
This page is general information, not medical advice. Ranges vary by age, sex, fitness and device. Talk to a clinician about anything that worries you.