My top 5 ways to build muscle after 40 years old as a natural drug-free lifter. Have you perfected all of them??? It is no secret that there is a window of time during youth that muscle building is optimal and ideal. When that anabolic window passes it can be much more difficult to force your body to lay down new lean tissue. Especially without the use of anabolic steroids. #homegym #fitness #naturalbodybuilding #fitafter40 #hypertrophy #buildmuscle #bestgym #nobs