Frozen shoulders are temporary. (so are "weak" backs)
Don't give up your bike. If your PT is telling you to give up your bike, find a new PT.
Here's the PT joke about frozen shoulders: With diligent therapy, ultrasound, massage, exercise, stretching, e-stim, and proper nutrition, a frozen shoulder will get better in about 12 months. If you leave it alone it will get better in about a year.![]()