P4P: The signal your body can't fake

Edition three. Let's get into it.

This week:

Let's go.

The Breakdown: How do you know if you're putting in enough effort during weight training? Do you measure effort by sweat or soreness? Here's the problem with effort: it can lie. Sweat isn't intensity, and soreness the next day isn't proof you pushed hard enough. You can feel completely wrecked and have barely touched the muscle fibres responsible for strength and size. As Arnold Schwarznegger put it in his recent newsletter, the better question is, “Are the last reps of my set challenging and slow, without my form breaking down?

When a rep starts to drag, when you're fighting to complete the movement with control, your muscles are telling you something your perception can't fake: I'm being asked to do something I can't easily do. That's the zone for growth. Studies on proximity to failure show that sets taken within 1-3 reps of muscular failure produce similar muscle growth to sets taken to complete exhaustion, but with a lower recovery cost. You don't need to grind yourself into the floor. You need to chase the slow rep.

Your Move: Next time you train, forget about how tired you feel overall. Pick one exercise and pay attention to rep speed. When the bar or the weight starts to slow noticeably, when you have to fight for the lockout, that's your signal. You're in the zone. Finish the set with control, rack the weight, and know that set counted. If your reps look the same speed from first to last, you're probably not close enough. Slow reps don't lie.

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The Breakdown: Your phone is a slot machine in your pocket, designed to keep you on it for as long as possible. Games. Ultra-processed content. Junk food for the mind. Your job is to limit that. One tool worth trying is One Sec, a screen time app that forces you to take a breath every time you open a chosen app (TikTok, Instagram, X, whatever your vice is). It doesn't block you. It just creates a pause. That pause is transformational, because most of the time, you'll realise you didn't actually want to open the app. You were just on autopilot.

Your Move: Download One Sec (or set up screen time limits on your phone) for your three most-used time-wasting apps. Try it for one week. At the end of the week, go to One Sec and check how many times the app stopped you from mindlessly spending time on social apps. Protect your clarity.

The Breakdown: Cal Newport made a point on the Modern Wisdom podcast recently that stuck: you need to start thinking about cognitive strain the way a weightlifter thinks about the burn of a muscle or a runner thinks about burning lungs. As something uncomfortable in the moment, but a sign you're getting stronger.

With AI making everything easier, the temptation is to offload your thinking. But here's the bigger picture: the knowledge economy is shifting towards more cognitively demanding work. Lower-level knowledge work has been outsourced or automated for decades. What's left is the hard stuff, the work that requires you to master difficult skills and apply them through sustained concentration. While everyone else uses AI to run away from cognitive effort, be the person running towards it.

Your Move: This week, pick one task you'd normally outsource or shortcut and do it the hard way. Write the first draft yourself before touching AI. Work through the spreadsheet manually before asking for a formula. Sit with the problem for 30 minutes before Googling the answer.