Hey y'all, I've been training for 18 years but am brand-new to HST. I just finished my first cycle of 15s and did my first workout of 10s. I've done things pretty much by the book so far. I don't know if I'm imagining it, but I think I'm already seeing some gains. Left bicep is 1/4-inch bigger, calves more defined, delts are coming up, and I feel dense and hard all over. It just seems so fast, especially now that I'm not always training to failure; it's hard to believe, and I'm not sure I do! At what point did other folks begin to notice improvements during their first HST cycle?