Doc,
Thanks for the thoughtful reply. You made a few points that made me rethink how I was framing this.
I agree that delts probably aren’t the limiting factor for my squat or bench. My thought on quads comes more from examples like Dan Green, who has spoken about using front squats and hack squats extensively to bring up his squat. Obviously technique and specificity still have to be there.
On frequency, would it be fair to say that while weekly training load is probably the primary driver of accumulated fatigue, frequency still influences how that fatigue is distributed? Two programs with identical weekly volume may not feel equally recoverable because session length, exercise selection, proximity to failure, and frequency all change the pattern of fatigue accumulation, even if the total workload is similar. Or do you think frequency itself has very little independent effect once those variables are accounted for?
Part of why I ask is that, for me, four lifting days consistently seem easier to recover from than six, even when weekly volume is similar. My limiting factor rarely feels like local muscle recovery. It feels more like overall recovery.
The other piece that has me scratching my head is my training history. From roughly 2004 to 2017 I trained mostly powerbuilding and later structured powerlifting (worked with Mike Zourdos and Mike Tuchscherer), did very little aerobic work, and generally tolerated training well. In 2017-2018 I trained for a half marathon, lost about 20-30 pounds, experienced a major life stressor around the same time, and since then I’ve had intermittent periods where higher training loads seem to produce insomnia, lightheadedness, elevated heart rate, digestive issues, and what feels like poor exercise tolerance.
Since then, lower-volume powerlifting has generally remained well tolerated, whereas higher-volume bodybuilding, especially with short rest periods and the recent addition of Zone 2 cardio, seems much harder for me to recover from.
My current thought is to back off to a four-day upper/lower split, use longer rest periods, keep weekly volume moderate, add carbohydrates and calories, keep aerobic work mostly easy (Zone 1 with limited Zone 2), and then gradually increase volume as tolerated rather than trying to force a PPL schedule.
Does that seem like a reasonable way to think about it, or would you still view total weekly training load as overwhelmingly more important than frequency in a case like this?
FYI - i have seen different doctors and done various tests and everything comes back normal. Sometimes it feels like in 2018 I experienced a trauma/stress induced RED-S or Overtraining Syndrome and i’ve been sensitized to this since then.