In the book: A better way to train. coach Carl (Carl Cantrell) Talks about cyclist buying lower gears for their bikes and riding them. He states that it will seem easier for about a month or so then your muscles will atrophy back to the easier gear you are now riding and the effort will be the same as before. My advice is dont do it unless you have medical need. it seems you are on the right track with hill time trails. I went from a triple to a compact double (50-34) up front and 11-26 cassette with now problem.