C617 Strength Ball

"Your breathing and your footsteps are consistent with each other. You must not be distracted and use your heart to feel the changes in every part of your body," Lin Feng said as he looked at her.

"Oh!" Yu Yin replied.

"Now, quicken your pace!" Just at this moment, Lin Feng suddenly increased his speed. Everyone hurriedly followed him.

"We must adapt to the change between fast and slow