* Make sure you're breathing easily. Another way to make sure that you're not running too fast is to make sure you're not out of breath. If you're huffing and puffing at any point during the run, slow down and make sure you can take deep breathes.
* 確保你能容易地呼吸。另外一個方法確認你沒有跑的過快的方法是確保你沒有上接不接下氣。如果你任何時候在跑步過程中氣喘如牛,降低速度并且確保你能夠深呼吸。