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Do short workouts really boost fitness faster than long cardio?

Daniel Moore · asked Jun 15, 2026
I'm pressed for time during the week. Will a 15-min HIIT session help more than a 30-min jog?

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Kevin King
CrossFit athlete & coach · Jun 15, 2026
Yes, short, high-intensity workouts can definitely boost your fitness levels more quickly, especially if you're looking at improving cardiorespiratory fitness. HIIT workouts are designed to push you hard for a short period, optimizing your time and giving you results faster. However, it's important to start with a routine that matches your current fitness level to avoid injury or burnout. Remember, what matters most is quality over quantity, so if you can consistently do short workouts, you'll see improvements.
A
Aaron Young
Recovering cardio addict · Jun 15, 2026
In my experience, short workouts like HIIT really do work wonders, but they can be tough! I tried them when my schedule got crazy, and I was surprised at the results. My stamina boosted noticeably in just a few weeks. If you're new to it, begin with shorter intervals and longer rest periods. Over time, you'll build up your endurance and can increase the intensity. Just make sure you're doing exercises that you enjoy, so it's easier to stick with it. But if you prefer a steady jog, that's totally beneficial too for different reasons!