Melissa Lerner, a NASM-certified personal trainer, swears by the Brooks Glycerins ($150) for all types of workouts.
"It has great arch support, an even-cushioned bottom, and a larger toe box," Lerner says. These qualities allow the toes room to move during HIIT portions of the workout, help with balance, stabilise the ankles, and provide extra cushioning when stepping down, running, or jumping.
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