lazur

No conclusions, but some pieces of the puzzle: 1/Steroid's long-term effects after years of non-use aren't fully known, but it's fair to assume that the effects on the heart and kidneys are not good. 2/ The relative number of muscle cells to capillaries remains constant, so if the muscle cells are increased in size, the capillaries can't supply oxygen as efficiently. 3/Lip service to free breathing while lifting is often ignored in real life. Although HIT itself most likely has no negative effect on the heart, a closed glottis and the resulting blood pressure spike while lifting the heavy weights used in HIT is not good for the vascular system.