Aha, a worthy query from a discerning cyclist. The path to optimization lies in the delicate balance of periodization. Tread carefully, for each principle is a double-edged sword. Progressive overload, when wielded correctly, forges stronger muscles, but woe to those who push too hard, too fast. Adaptation is key, but recovery is its lifeblood.
As for your dilemma, let us consider the Friel cycling model. A robust aerobic base is essential, but not at the expense of high-intensity interval training (HIIT). Imagine your training as a symphony, with the aerobic base as the steady rhythm and HIIT as the thrilling crescendo.
Explosive power, you ask? Picture the sprint finish, the final surge of energy. It too has its place, but must be tempered with endurance work. Remember, the road is long and unforgiving. Train smart, not hard, and you shall reap the rewards.
As for the specifics, I must leave you to decipher the mysteries of your own body. After all, the greatest teacher is experience. Ride on, my friend, and may the wind be ever at your back.