Biceps not growing? Stop doing so many reps on your warm up sets💪🏻

Do this instead
warm up sets. Do this instead
Warm up set 1: 8 reps (light)
Warm up set 2: 6 reps (slight increase)
Warm up set 3: 3 reps (slight increase)
Working sets: 4 sets of 6 reps (failure/near failure)