Bad news for anyone who loves Pilates: Trad men have discovered the exercise and taken a liking to the “Pilates girl.” Pilates ― a low-impact, full-body movement method focused on core strength, control, alignment and breath ― has surged in popularity in the past few years, especially among women. The celebrity-favorite workout can be done on a mat at home or with a specialized machine that uses springs and pulleys for resistance. Those who practice it swear by its ability to tone the body and reduce stress. But Pilates also has a certain reputation it can’t seem to shake: People think it’s for rich white women. Like yoga before it ― the last “It” girl exercise of this scale ― the practice isn’t inherently exclusionary, but the way it’s marketed tends to center a narrow body ideal and women of a certain tax bracket. An average 60-minute group class typically costs $30 to $65. Then there’s the “look” it gives you.…