I travel to work on the MRT, but but I want to      include some pysical activity into my daily commute.                                   It's too far for me to ride to work.

... if so, then these routes might be right for you.

I would like to ride from:

Woodlands MRT (Woodlands Ave 7) to Khatib MRT   directions Yio Chu Kang MRT (Ang Mo Kio Ave 5,6) to Bishan MRT   directions Queenstown MRT to Tiong Bahru MRT   directions