Why Cardio Isn't Enough for Healthy Aging #shorts

追加: 2026-05-06

[00:00:00]But hang on. April was exercising her whole life. She was fit.

[00:00:05]All that cardio did wonders for her heart, her blood vessels, her metabolic health, and her brain.

[00:00:10]Why didn't it keep her strong?

[00:00:13]Here's why.

[00:00:14]There actually two types of muscle fibers, creatively named type one and type two.

[00:00:20]Type one fibers are for endurance.

[00:00:22]They're what April used during all those years of running and cycling. They're small, they don't grow much, and they don't produce much power.

[00:00:30]They're great for going long distances, but they don't make you strong.

[00:00:35]Type two fibers are for power and strength.

[00:00:39]They're bigger, stronger, and they fatigue much faster.

[00:00:43]They're only recruited when you need short bursts of power.