Do you want to do something for your fitness every day?

Then take the bicycle to reach the nearest station from your home. Some stations even have guarded public bicycle stations or bicycle enclosures that can be locked. Nothing easier: you park the bicycle, you lock it and off you go on the train. More information:   

http://mct.sbb.ch/mct/en/reisemarkt/services/mobilitaet/bikeparking.htm

You do not want to part with your own dear bicycle?

In nearly all trains, you can take it along in the self-loading mode:
http://mct.sbb.ch/mct/en/reisemarkt/services/wissen/velo.htm
 

Or you make use of the bicycle transport services of SBB:
http://mct.sbb.ch/mct/en/reisemarkt/services/wissen/velo/veloversand-schweiz.htm

Why not ride on a bicycle from the destination station to the final goal of your trip? Or do you just want to get a closer look at the region? At around 50 stations, the SBB offers first-rate bicycles for hire. Just use them, it is simple. Book one, pick it up, and start the ride:
http://mct.sbb.ch/mct/en/reisemarkt/services/mobilitaet/mietvelo.htm