Not getting enough sleep will raise cortisol levels, and usually means lower testosterone levels which. Plus, getting at least 7-8 solid hours of sleep every night has other benefits, not just to do with bodybuilding. _Website not available. Sign in: https://www.twine.net/signup_…Not getting enough sleep will raise cortisol levels, and usually means lower testosterone levels which. Plus, getting at least 7-8 solid hours of sleep every night has other benefits, not just to do with bodybuilding. _Website not available. Sign in: https://www.twine.net/signup_WWWW…