AndreyT

Nothing will "optimize your energy". You are "relatively new to bicycling", as you stated it yourself. The concept of "optimizing your energy" does not apply to you in any way, shape or form. And it won't apply for a very, very, very long time. Possibly never, especially considering that on such an early stage you are already focusing on such woefully irrelevant things.

Even if you'll seriously get yourself involved into cycling, you'll eventually find out that there's no other way of really "optimizing your energy" than riding a lot of different bikes and finding the ones that work for you. And in many cases this synergy will not follow formal logic.

As for now, don't attempt to "optimize your energy". Get a bike that fits in a sense that it doesn't do more harm than good.