Originally Posted by AZSkeptic

Look up Alex Viada. He champions something he calls "hybrid training," which is essentially combining strength and endurance sports. (For example, he competes in both powerlifting and triathlons.)

He refers to a concept he calls "consolidation of stressors." If one has both a heavy leg day for lifting and a day on which one performs intervals, he considers these to be similar in their effect on the body. Rather than spreading them out and impacting recovery negatively, he likes to combine such efforts on the same training day. Conversely, if one has a lifting day on which one uses lower weights but higher reps, that might be a good session to combine on a day with a long endurance ride.