It’s week three of our push-up challenge, and if you’ve been following along so far, your core will thank you. This week, our focus is on the high plank, which teaches the core how to connect the upper and lower body into a single, unified structure. Our video-based instructions demonstrate proper form and technique. New to the challenge? Catch up on weeks one and two here.

And before you toss that expired box of granola bars from your pantry, know this: best-before dates on prepackaged foods are quality indicators, not food safety dates. With food costs soaring, nobody wants to waste perfectly edible grocery items. Here’s what to know about best-before dates and what they mean.

From food and drink to parenting and relationships, The Globe and Mail publishes several newsletters designed to keep you healthy, active, and informed. Visit our signup page to subscribe.