If something works why change it?  If what you are doing now is working and heals pains from biking alot, then why change?  If the Pilates worked before, then why not do it again?

Why did you stop doing it is the question.  We only do Eischens Yoga for alignment b/c over my 28 years of training people that is the only method I have found that does what I needed and what others needed as well.  I know pilates works for many people, I tried it but was not crazy about it.  It is also the instructors skill in teaching that either makes it or breaks it,

Joseph Pilates understood the body,  Roger Eischens understood the body and I was lucky enough to train and learn from him! What sits best with you? Go and explore that, if it makes you feel better do that.

I  have another question for you. Do you like doing the EY or do you find it to be a chore? If it is not a chore, great, then you do work to improve daily with your practice.
if it is a chore, you’ll never really improve much on it as your goal in doing it is to get it over with:),  You’ll get reward, but not as much as when you do it with the goal of improving daily on it.

I say this b/c I ask people and they say yeah I do my yoga.  When I ask them how long and they reply,  about 5 minutes 3 x week…right there I know it is a chore for them. they do not see or feel what possibilities EY has for them. so I tell them I understand as I went through  the same thing at one time. then figured out what Roger had told me, to do the poses to make other movements more free.

I suggest to go back and forth between an exercise you want to do well and an EY pose, see and feel the difference that the EY brings to your exercise or another pose. that is exciting and fun and makes you want to do more and do it daily.  Many people also find EY difficult to do because EY requires patience & diligence. these we all need practice in but just b/c we need to do it does not mean we want to do it:)