Last year it was the Winter Arc. Before that it was 75 Hard. Now? It's the Great Lock In. If you’ve been on TikTok lately, you’ve probably seen this new self-improvement trend making the rounds.

“The Great Lock-In” is here, and if you’re thinking youth group sleepovers or overnight school field trips at a museum, then this explainer is for you. This lock-in — also known as the “winter arc ...

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FILE - A shopper shops at a retail store in Arlington Heights, Ill., Tuesday, Sept. 23, 2025. (AP Photo/Nam Y. Huh, File) (Nam Y. Huh, Copyright 2025 The Associated ...

Forbes contributors publish independent expert analyses and insights. I write about branding, burnout, and redefining ambition. From 3rd to 4th quater symbol. Turned wooden cubes and changed words ...

This is read by an automated voice. Please report any issues or inconsistencies here. As the end of 2025 approaches, a viral TikTok trend is helping people achieve their wellness goals: “The Great ...

NEW YORK (AP) — As the end of 2025 approaches, a viral TikTok trend is helping people achieve their wellness goals: “The Great Lock In” encourages participants to finish the year strong by fully ...