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Strength

Fatloss

+2

The cardio mistake costing you 6 hours a week (and zero new muscle)

Jul 14, 2026

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2 min read

The cardio mistake costing you 6 hours a week (and zero new muscle)

After 40, walking burns the fat — but only strength training keeps the muscle. Here’s the add.

Jason from Dad OS
Jason from Dad OS

Strength

+1

The 30-minute recomp window: fit it between the kids and the calendar

Jun 23, 2026

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1 min read

The 30-minute recomp window: fit it between the kids and the calendar

Three 30-minute lifts beat one 90-minute weekend grind. Here’s where to find the time.

Jason from Dad OS
Jason from Dad OS

Nutrition

+1

The protein math that changes everything after 40

Jun 16, 2026

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2 min read

The protein math that changes everything after 40

Most dads over 40 are 40 grams short. Here’s the per-meal math that fixes it.

Jason from Dad OS
Jason from Dad OS

Fatloss

+2

[Bonus] Your Saturday already counts. You just aren’t getting credit for it.

Apr 23, 2026

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1 min read

[Bonus] Your Saturday already counts. You just aren’t getting credit for it.

Why weekend yard work counts as a real workout — and the Harvard study that proves it.

Jason from Dad OS
Jason from Dad OS

Nutrition

+2

The muscle you’re losing right now (and don’t even notice)

Mar 31, 2026

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2 min read

The muscle you’re losing right now (and don’t even notice)

After 40, you lose ~1% of muscle per year. Here’s the 3-move resistance plan to reverse it.

Jason from Dad OS
Jason from Dad OS

Longevity

+1

The one number that predicts how long you'll live (it's not your weight)

Mar 18, 2026

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2 min read

The one number that predicts how long you'll live (it's not your weight)

Your grip is telling you something. Are you listening?

Jason from Dad OS
Jason from Dad OS

// Dad OS //
Dads over 40 are losing energy, muscle, and time. Not you. Dad OS — one cheat code. 300 words. Every Tuesday.


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