When Reese Scott started training women to fight at Kingsway boxing gym in Manhattan in 2007, she had just two pupils. The male boxers at the gym frequently warned Scott: You’ll never have enough women to train.

But Scott’s sessions kept growing. One morning she was looking at 30 women. “I took over the gym,” says Scott, 45.

Now, Scott is starting a boxing gym of her own — a first of its kind.