Mike Mentzer’s Heavy Duty training philosophy supports using a compound exercise first in a warm-up for supersets, as it effectively prepares multiple muscle groups and joints for the intense workload while conserving energy. For a superset targeting the same muscle group (e.g., bench press followed by dumbbell flyes for chest), perform 1-2 warm-up sets of the compound movement (bench press) at 40-70% of the working weight for 6-12 reps, with 30-60 seconds rest between sets. This sufficiently wa