If you are thinking of how your feet strike the ground and have decided to change your footstrike to your forefoot, you need to think about a couple of things.
If you want to avoid injury, then one of the best ways is to land on your midfoot and roll onto your forefoot.
Striking the ground with your heel can be dangerous and also cause injuries.
When you land on your heels, you are stopping the natural forward momentum of your foot, which places a lot of strain on your knees.
Landing on your heels can also cause shin splints. However, forefoot running also has a downside.
It can cause you to bounce, which is not the very best way of running. The best way to run efficiently is to strike the ground midfoot.