Number 1 tip is to use anabolic steroids and do them curls for the girls or bis for the guys if that’s what floats your boat.
Favourite Curls AKA fluff exercises: DB Non Alternating Strict as Fuck Curls, Hammer Curls and Cable Curls
I’m the first one to throw “progressive overload” at anything related to hypertrophy lel but overloading isn’t just about weight and in the case of biceps IMO it shouldn’t be.
Biceps are just hard to expose to load and increased loading effectively in the first place. e.g. if you add 10kg onto your bench you’re exposing your pecs to that increased load stimulating growth whereas if you throw more weight onto curls even a little bit you’ll be cheating little by little in no time. When its hip thrust and shoulder front raising momentum that’s doing more and more of the work as well as torso lean and manipulating the angle the arm is working at to get to make the torque requirements easier on the biceps it all gets a bit ineffective. Adding weight isn’t as effective at overloading the biceps as one would think.
This pretty much but is kinda a easier said than done thing.
Progressive overload is more than just weight tho. Increasing volume over time is just as good stimulus for muscle growth. For curls I reckon this is a good approach coupled with regular progressive overload on chins and other pulling movements.
For example say week 1 we do a super super super strict curl variation 10kg/hand for 5 sets of 10 reps per week. We got plenty of options here to overload while using the same weight.
More reps: strict of course so when you start pausing to rest or swinging a bit you’re done. This way you can progress to 15-20+ reps over time.
More sets: workload over time includes workload per week and this can be overloaded. Say you do 5 sets of biceps the first week and 20 weeks later you’ve worked your way up to doing 25 sets of bicep curls. This is progressive overload/stimulus for muscle growth while still using the same weight as week 1.
Other shit: Like intensity techniques e.g. drop sets, blood flow restriction training or reducing rest time can be effective as well but I don’t use it much myself because you can go so far with the first two strats.
When you’ve exhausted the above add 2.5kg and repeat.