The amount of physical activity that’s recommended for health benefits doesn’t affect your fertility.
However, physical activity that lasts for too long, is too intense, and is done too often can affect your health. This is called “overtraining.” Some people who overtrain may stop menstruating. However, this is rare and usually happens to high level competitive athletes.
Overtraining may lead to what’s called a “negative energy balance.” This is when your body needs more energy from food than you’re eating. You can either find ways to eat more healthy foods or change your training schedule. If you have concerns about overtraining, talk with your health care provider.