Effective , had better be the ground that seeks clean , barefoot ran , turn in place the group runnings , its optimal time had better be afternoon after 4 o ' clock , because this time duan rong is easy corner is adipose 有效的,最好是找干凈的地,赤足跑步,在原地轉圈跑,它的最佳時間最好是在下午4點以后,因為這個時間段輕易囤積脂肪。