Treadmill Exercise

I go a sport gym and usually ride a static bike after some resistance training.

However, I ran on a treadmill today.

Although I tried to run 10 km, I gave up at 5 km because of knee joint ache.

Since I always ride a bicycle, my legs' function for walk/run might degenerated.

I am ashamed of myself.

• I go a sport gym and usually ride a static bike after some resistance training.
• I go a sports gym and usually ride a static bike after some resistance training.

• However, I ran on a treadmill today.
• However, I ran on the treadmill today (instead).

• Although I tried to run 10 km, I gave up at 5 km because of knee joint ache.
• Although I tried to run 10 km, I gave up at 5 km because of an ache in my knee joint.

• Since I always ride a bicycle, my legs' function for walk/run might degenerated.
• Since I always ride a bicycle, my legs' ability to walk or run might have deteriorated.

• I am ashamed of myself.
• This sentence is perfect! No correction needed!