Six days after intercourse during ovulation, you may feel soreness in your legs. This is a normal physiological response because the fertilized egg is forming while running and requires a lot of energy and nutrients. However, if you've been experiencing leg soreness, you may want to consider whether further testing is warranted.

1. Excessive exercise: If you perform strenuous exercise during this period, it may cause muscle soreness and leg soreness. Although this is a common condition, if you feel uncomfortable, it's best to take a break and avoid excessive exercise.

2. Pregnancy: If your cycle is normal, you may be pregnant. Pregnancy causes the body to require more energy and nutrients, which can lead to sore legs. If you suspect you are pregnant, it is best to get further tests.

3. Disease: Some diseases, such as arthritis or musculoskeletal disorders, may cause leg aches. If you feel uncomfortable, it's best to see your doctor for a checkup.