This is an installment of Good Fit, a column about exercise. I took my first CrossFit Kids class when I was 10 years old, the summer between fifth and sixth grade. I remember a circuit that involved ...

Huffing through yet another long run together, my friend and I got to talking about how unlikely it was that the two of us had, one, met at the gym, and two, were now training for a marathon. Like the ...

Nowadays, when children are bored, they don't go outside and play with the other kids in their neighborhood, pick up a book, or even just sit and play with their toys. Instead, many children turn to ...

A quick burst of exercise before class may be the key to sharper thinking and better grades, according to new research from the University of North Carolina Greensboro. The study found that just nine ...