if you mean insanity as in that cardio program...you're not gonna gain much mass. Insanity is designed for losing weight/fat.
If you want muscle mass, eat more carbs and protein, spend that HGH money on Creatine and Protein powder instead, ditch the Insanity, and start on a 5x5 routine.
If you want muscle mass, eat more carbs and protein, spend that HGH money on Creatine and Protein powder instead, ditch the Insanity, and start on a 5x5 routine.