Easy Periods

Does being athletic have anything to do with how heavy/light your period is? I'm a gymnast & softball player, and ever since I started gymnastics back up last year, my periods are the same every month. Normal the first day, a little bit lighter the second & third, and the 4-7 it's like it would be the last 2 days of it. almost nothing. I don't really get cramps or acne or anything. does being athletic affect your periods?