If You Can Hold a Plank This Long After 55, Your Core Stability Is Top-Tier
https://www.eatthis.com/how-long-hold-plank-after-55-core-stability-top-tier/
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If You Can Hold a Plank This Long After 55, Your Core Stability Is Top-Tier

A certified trainer reveals the plank hold time that signals top-tier core stability for adults over 55 — and how to get there.

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