Modern people are paying more attention to exercise and many celebrities are leading the trend，while in ancient China there were also many（1）

fitness

fitness

（fit） lovers.
    The great Song Dynasty poet Su Dongpo（2）

preferred

preferred

（prefer） to take long runs，and he thought that only by moving your body（3）

regularly

regularly

（regular）could you have a strong body and adapt to the seasonal changes quickly.
    In a letter to his friend Cheng Zhengfu，Su Dongpo talked about his exercising habit，（4）

which

which

was to run five kilometers per day.He would slow（5）

down

down

when he breathed hard，and speed up when he breathed（6）

normally

normally

（normal）.Su Dongpo would run until he was sweaty.
    We can see that when Su（7）

was running

was running

（run），he stressed "qi"，which means energy.Su was a fan of qigong，（8）

a

a

system of deep breathing.He ran in the morning and sat in meditation（冥想）at night，（9）

making

making

（make） qi flow inside his body.After meditating for nearly 20 days，he felt his body was much（10）

stronger

stronger

（strong） and could run from the first floor to the fifth without resting in the middle.He believed that by practicing in this way，he could live longer.