Mallory Creveling
CPT
Mallory Creveling, a freelance writer based in Brooklyn, has been covering fitness, health, and nutrition for more than a decade. In addition to LIVESTRONG.com, you can find her work in Health, Shape, Runner's World, Men's Journal, and more. She's also a certified personal trainer who currently leads virtual workouts.
- Author (6)
By Mallory Creveling
![young man in the gym breathing through his nose during a breath-based interval workout](https://img.livestrong.com/375/cme-data/getty%2F963eef3c38d94893bc5ab1cff7acb660.jpg)
Fitness