Oh hell no!! For a big guy ive got plenty in the tank, BUT it mostly depends on who's teaching class as some really beat u up with the warm-ups & lactic acid sets in fast, but even the rough ones I can scrape by & use the time were being shown a new move to practice to recover & I only need a few minutes for the lactic acid to go bye bye. Its the back muscles that are tearin me down even now as I sit here there hurtin pretty bad from the week of torture! My only concern is that this might be a side effect of the oral Turinabol!!