I don’t get it for running, running makes me feel terrible, and I have a bad knee which probably contributes, it’s too painful after about 10km (6miles). But a

I don’t get it for running, running makes me feel terrible, and I have a bad knee which probably contributes, it’s too painful after about 10km (6miles). But after a good challenging bike ride I have 30 minutes to 1 hour of feeling great.