Glenn DawsonReset-U Fitness · Owner and CEO of Reset-U Fitness

The Cardio Mistake Killing Your Metabolism (After 35)

15 Apr 2026 · 1 min

Watch on YouTube

0:39

In this fitness advice segment, the speaker argues that excessive cardio can backfire by lowering basal metabolic rate (BMR), based on a recent study of cyclists that showed aggressive cardio reduced their baseline metabolism over time. While cardio burns calories during the workout, it leads to a slower daytime calorie burn, contributing to weight regain. The speaker emphasizes that this metabolic slowdown is especially problematic for people over 35, and recommends focusing on diet and resistance training to improve hormonal balance and raise BMR for sustainable weight loss.

Chapters

You're gaining weight because you're doing too much cardio. Most people lose weight and gain it back, and most people do a ton of cardio when they exercise. Here's what's actually happening. In a recent study on cyclists, they found that aggressive cardio was making them lower their BMR over time, meaning the more cardio they did, the slower their baseline metabolism got. So they were burning more calories during the exercise but less during the day. So why does it even matter? If you're killing yourself on the cardio machines, you're also killing your metabolism long term, meaning the goals that you're getting, you're renting, you're not owning them. If you focus on diet and lifting weights, things that actually help your hormonal environment and raise your BMR, you will actually lose the weight and keep it off.