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Read EZAs threads on this.
My best hack answer to the last part:
- the primary mechanism by which LSD improves cardio performance is via enlarged heart capacity and improved capilliary flow
- the primary mechanism by which HIIT improves cardio performance is via strengthenting of the heart walls allowing more forceful pumping.
Probably a simplification, but go with that. So would HIIT derived benefits conflict with LSD ones? I don't think so. Its my understanding that the LSD gains are 'stickier' so you may need to to less LSD maintenance.
Also, EZA cautioned that gaining the improvements from HIIT then trying to get the benefits from LSD was more difficult then the converse, and based on that recommended driving resting heart rate to target goal as an early conditioning goal.
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