Another reason I'm so passionate about cycling

[shootingstar]

Instead of exercise or suggesting it, go for a walk with him to talk.

He probably knows you are a good cyclist and that probably intimidates and depresses him even more.

I would weave in a walk, even with a bike and then go for a super short ride. Have a coffee afterwards.

He needs to talk with someone more than anything else at this time. Key in his favourite interests to talk about.

[jusdooit]

I would be very careful about the intensity level of exercise for your friend. If he has CHF he will not be able to tolerate intense exercise.