Why I Started Running (After Years of Avoiding It)

For most of my training life I treated cardio as punishment — something you did to lose weight fast, not something you built. I was a lifter. Cardio was for people who did not lift.

Then I started noticing that my work capacity in the gym was limiting my training more than my strength was. I could handle the load, but the conditioning was poor. I would rest for four minutes between sets and still feel rushed. My heart rate spiked on sets it had no business spiking on.

What actually changed

I started with two runs per week. Nothing aggressive — 25 to 30 minutes at a pace where I could hold a conversation. Zone 2, roughly, though I was not tracking heart rate at first.

After eight weeks the difference in the gym was noticeable. Rest periods felt shorter. I recovered between sets faster. Heavy sets that used to leave me winded stopped doing so.

The mechanism is simple: aerobic fitness improves your recovery between sets even in strength training. A bigger aerobic base means faster phosphocreatine resynthesis. More is not always better, but some is significantly better than none.

What I do now

Two runs per week, 30 to 40 minutes each, at a pace where I can breathe through my nose. One of them is on a rest day from lifting. The other is on a light training day as a finisher.

I do not run for body composition. I run because it makes everything else in training work better, and because I feel better doing it. That turned out to be enough.