The suggestion in your first post looks a lot like this recent recommandation of Jim’s. Don’t just read the first post, more explanations are given in the thread.
Having tried something very similar : it’s foolproof and it works.
To make it simple :
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Choose one push, one pull, one squat and one hinge accessory.
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Perform Agile 8.
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Jump / throw
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On squat & deadlift days, superset all your main and FSL sets with push and pull accessories.
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On bench & press days, superset all your main and FSL sets with squat & hinge accessories.
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Do one of your pet exercises for prehab after that. It should be light. No, lighter.
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Then, some light conditioning (not killing yourself, but enough to get your heart working)
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Go home, eat, rest, live your life
Whether you use 5/3/1 rep scheme or 5’s pro, however many sets you perform for FSL depend on your goals. I like 5’s pro + FSL 5x5 for leader and 5/3/1 + FSL3x5 for anchor.