I'd be cautious about leaning too heavily on Hickson. Two big caveats about his training protocols:
Endurance training protocol in Hickson entailed "continuous running as fast as possible" for 30-40 minutes 3x/week, and a lot of us have noticed that the recovery cost of running is a good deal more than linear in speed; running twice as fast takes a lot more than twice as much out of you.
Strength and endurance sessions were "usually separated by at least two hours", notable in context of more recent results from Robineau (2016) and Sporer and Wagner (2003) suggesting that strength training interferes with endurance training and vice versa much more if both sessions are within a 6-8 hour window than if they're separated by at least 8 hours.
See full text here:
Sci-Hub | Interference of strength development by simultaneously training for strength and endurance | 10.1007/BF00421333
(In addition, Wilson et al's 2012 meta-analysis suggests that concurrent training is probably just fine if the endurance training is via a low impact-modality like rowing or cycling, though OP needs to care about his running at some point so this isn't entirely relevant to the thread.).
Also, first post, hi guys.