No its not.exercise bikes are a poor substitute in cardio terms though.
its a bit like saying i will walk for an hour instead of running for an hour.
have you thought about an elliptical? Whole body workout, less stress on your joints and can be a small footprint depending on the model.

Been looking at exercise bikes and the top end ones ie the bike equivalent of the concept 2 are very expensive! Think I'll just grow old and fat and enjoy it![]()
Been looking at exercise bikes and the top end ones ie the bike equivalent of the concept 2 are very expensive! Think I'll just grow old and fat and enjoy it![]()
Get a pair of trainers and go for a run.

Top end rowers £1000 - £1300
Excercise bike ... Life Fitness 95c
As for running my knees say no as well![]()
ebay - type in concept 2 (within 50 miles distance) and buy any one
hope you have a van or access to one.
You don't need a van, a saloon with split fold rear seats will be fine as the rower can be carried in two parts.