Seriously mate? wrote:
If I had unlimited free time like a professional athlete I would run the longer workout morning or mid-morning and the shorter workout in the afternoon/evening. I like getting the majority of the work done earlier in the day.
Real world: I do my shorter run before work and my longer run after work. I don't enjoy getting up super early to run.
I agree with this. For athletes in general, individual or team sports, during morning workouts they are prone to be less receptive to technical components. They are still waking up and, even if they were excellent early birds, their bodies and nervous system are not fully synced. That is why many pro athletes use the mornings to put on volume work or just "uncomplicated" exercise.
Afternoons you are at the peak of your mental/physical activity mix, so any work towards perfecting technique usually takes place at this time. Now, in the case of running a shorter/longer run, it depends on what you want to achieve with each run. If longer runs are only for purposes of logging the miles, mornings are ideal. If pacing and in-race simulation is needed, maybe afternoons will work better. On the other hand, if short runs are intended to practice top-end or other speed-specific components, it may be best to do it in the afternoons.