I used to swear by high-intensity cardio workouts to keep me fit. As part of my CrossFit style training regime, I’d do at least three 10- to 20-minute HIIT workouts per week that would leave me ...

Add Yahoo as a preferred source to see more of our stories on Google. Westend61/Getty Images If you want to boost your cardio fitness, you’ve got two ways to level up your workouts: push harder or ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." If your weekly schedule looks like a jigsaw puzzle, squeezing in both cardio and strength training can be ...

Sarah is a registered dietitian and freelance writer passionate about connecting people to information that will help them improve their mental and physical health. She’s a big believer that food is ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. January 12, 2026 Add ...

The cardio craze has ebbed and flowed for decades. At various points in time, it’s felt like everyone is obsessed with cardio-based workouts—and doing a lot of them—from step aerobics in the ’80s to ...