Mariposas
Best Biceps Exercises
By Zachary, builder of Mariposas · Reviewed against published exercise-science sources (references)
· Last updated June 2026
The biceps sit at the intersection of vanity and function: they contribute to pulling strength in rows and pull-ups, assist forearm supination, and are among the most-watched muscles in any gym. What separates meaningful biceps work from junk volume is mostly about the stretch position. Research and coaching practice consistently show that loading the long head of the biceps at full extension (think incline dumbbell curls, where the arm falls behind the hip) produces more hypertrophic stimulus than partial reps done in the mid-range. The other overlooked variable is grip orientation. Supinated, neutral (hammer), and pronated curls all shift the emphasis differently across the brachialis, brachioradialis, and the two biceps heads, so variety in grip across a training week is genuinely useful, not just novelty. Track every set, rep, and load inside Mariposas for free and collect pets as you hit new milestones. It turns progressive overload into something you actually look forward to.
How to train your biceps
Biceps training tends to respond well to moderate-to-higher rep ranges, with many coaches programming the bulk of curl volume somewhere in the 8 to 15 rep zone while occasionally going heavier on compound rows where the biceps are a strong secondary mover. Frequency matters more than total weekly sets crammed into one session. Two or three sessions per week that hit the muscle with fresh effort generally outperform one marathon arm day, because the muscle is relatively small and recovers quickly. Pairing a stretch-focused isolation curl (like an incline or spider curl) with a more neutral-grip or hammer variation in the same session covers the full length-tension relationship without needing a complicated program.
FAQ
- Do I need a dedicated arm day to grow my biceps?
- Not necessarily. Plenty of lifters add meaningful biceps size by doing two or three sets of targeted curls as an accessory after back-focused training days. The biceps are already pre-fatigued from rows and pull-ups, so the additional isolation work hits them without requiring a separate session. A dedicated arm day makes more sense if back training days are already long, or if biceps are a specific weak point you want to prioritize with fresher energy.
- Why do my forearms fatigue before my biceps during curls?
- This usually comes down to grip width, wrist position, or an over-reliance on brachioradialis. When the wrist is allowed to flex or the grip is very wide, the forearm flexors take on extra work to stabilize the dumbbell or bar. Keeping the wrist neutral to slightly extended (not letting it curl toward you) and using a shoulder-width grip on a barbell tends to shift the load back toward the biceps. If it persists, some direct forearm work can bring those muscles up so they stop being the limiting factor.
- What's the actual difference between training the long head versus the short head of the biceps?
- The long head runs along the outer side of the upper arm and, because it crosses the shoulder joint, gets a bigger stretch when the arm is positioned behind the body. Incline curls and concentration curls done on an angled bench emphasize it. The short head sits on the inner side and is more active when the arm is in front of the body or when the elbow starts from a position where the shoulder is flexed, like a preacher curl. Both heads contract together in most curls, but positioning the arm changes which head is under more tension through the range of motion. For visible peak development, long-head emphasis is commonly prioritized; for inner thickness, short-head work fills in the gap.
- How much rest between sets is reasonable for biceps isolation work?
- For hypertrophy-focused curls, most lifters get good results resting somewhere between 60 and 120 seconds. The biceps recover relatively fast between sets compared to large compound movements, so shorter rest periods are more tolerable here. That said, if the goal is to use heavier loads to drive progressive overload over time, allowing closer to 2 minutes ensures you can actually hit similar rep counts each set. Cutting rest too short in pursuit of a pump often just means each successive set loses reps faster and total quality volume drops.