7 Reasons Your Endurance Isn’t Changing No Matter How Much You Work Out

Your workout schedule is no joke. Between the sunrise runs, lunchtime spin classes, and evening yoga practice, the only thing more packed than your fitness routine is your laundry basket. Your Instagram feed is a steady stream of #fitspiration, and your abs are the envy of your squad. So why is it that when you hit the road for your regular five-mile loop around the neighborhood, it still feels hard AF every single time?

“This is a common theme with athletes of all ages and abilities,” says Anthony Baugh, a NASM-certified personal train at Independent Training Spot in NYC. “And it nearly always comes back to workout intensity and rest.” Here are seven reasons you may not be seeing endurance gains—even if you’re working out ‘round the clock.