Jeff Cavaliere believes bigger arms don’t require marathon workouts or an entirely new training split. Instead, the ATHLEAN-X founder says a focused, progressive approach performed over just 22 days can deliver noticeable improvements in arm size.
In a recent YouTube video, Cavaliere unveiled a structured three-week program designed to increase biceps and triceps growth through higher training frequency, progressive overload, and exercise variety without adding a dedicated arm day.
Start With a Baseline and Increase Training Frequency
“I’m going to help you to build bigger arms, guaranteed.”
The program begins with a simple task: measure your flexed arms on day one at the highest point of the biceps and the thickest part of the triceps. Athletes then repeat the measurement on day 22 to objectively track their progress.
Rather than replacing an existing training program, Cavaliere recommends keeping compound lifts like pull-ups, rows, bench presses, and overhead presses while swapping out any direct arm work. The new arm sessions are performed at the end of regular workouts three times per week for both biceps and triceps.
Build a Better Mind-Muscle Connection
“If I can get you to actually feel what a good complete contraction is supposed to feel like, you’re going to be able to start to build upon that.”
The first week focuses on improving contraction quality.
For biceps, Cavaliere selects the incline waiter curl to minimize shoulder involvement while emphasizing peak contraction. During weeks two and three, trainees add pulse repetitions at the top of each rep to increase time under tension.
The triceps receive similar treatment through bench dips performed to technical failure. Pulse contractions are gradually added at full lockout during the second and third weeks to reinforce elbow extension and maximize muscle recruitment.
Target Arm Width Through Progressive Overload
“If you’re not working this enough, I can guarantee you it’s one of the reasons why your arms are not filling the shirt sleeves right now.”
The second pairing targets muscles that create overall arm thickness.
Alternating cross-body hammer curls shift more emphasis toward the brachialis, while either triceps pushdowns or thumbs-up dumbbell bench presses focus on fully locking out the elbow to recruit the medial head of the triceps.
Each week, athletes increase the weight by five pounds and use rest-pause training as needed to complete all prescribed repetitions.
Finish With Eccentric Overload
“We know that that is one of the main drivers of hypertrophy if done correctly.”
The final weekly workout emphasizes slow negatives to increase mechanical tension.
Cheat curls allow lifters to use slight momentum during the lifting phase before controlling the lowering phase for progressively longer eccentrics. Triceps training follows the same concept with PJR pullovers, using the lats to assist the concentric while placing the emphasis on a slow eccentric stretch of the long head.
The eccentric tempo increases from three seconds in week one to five-second negatives during the final week.
Takeaway: Small Sessions, Consistent Progress
Cavaliere explains that the program succeeds by spreading direct arm work across multiple weekly sessions rather than cramming it into a single workout. Combined with progressive overload, rest-pause sets, controlled eccentrics, and improved mind-muscle connection, the plan aims to maximize muscle protein synthesis while avoiding unnecessary training volume.
After 22 days, participants are encouraged to measure their arms again and compare the results, letting the tape measure determine whether the extra frequency translated into noticeable gains.
About the Author
Jeremiah Oliva
Jeremiah Oliva is a writer passionate about fitness, sports, and active living. He has experience in songwriting and managing content and social media for online radio and magazine platforms.
He covers HYROX, CrossFit®, and competitive fitness, with a focus on performance, mindset, and athlete development.
Outside of writing, Jeremiah trains in boxing, cycles, explores the outdoors with his kids, and plays the guitar.
