Take a heavy compound lift (e.g., squat or weighted pull-up). Instead of doing 8 reps straight, do 4 reps, rack the weight, rest 10 seconds, then another 4 reps. That’s one cluster. Perform 3 clusters with 30 seconds between clusters. Result: You complete 24 high-tension reps in ~2 minutes, achieving what normally takes 8 minutes.
Utilizing heavy compound lifts mixed with targeted isolation to "carve" muscle. The "Hidd" (Hidden) Workout Secrets Rodney St Cloud Workout And Hidd