Gyms are scrambling to add squat racks for the strength-training renaissance

iStock; Rebecca Zisser/BI

Venture into any commercial gym during peak hours, and you'll likely see the same thing.

Row after row of empty treadmills, stair climbers, and elliptical trainers. Meanwhile, crowds of people are swamped around the squat racks, benches, and free weights, waiting to pounce on the first free piece of equipment.

Long cardio sessions are a thing of the past. Now, everyone and their mother (literally) is into squats. And deadlifts. And hip thrusts. And a multitude of other strength-building moves...