With so many different types of workouts (cycling, running, yoga), and lots of fun, flattering gear just a click away, it's easy for your bedroom to become completely overtaken by workout clothes. If you've watched Marie Kondo's Tidying Up and you're suddenly feeling overwhelmed by the clutter, we're here to help. POPSUGAR spoke with Corey Phelps, an NASM-certified personal trainer in Washington DC, to find out exactly how many sets of workout clothes you need if you work out up to five days a week. Here's what she suggests: