World’s Fastest Arm Workout: Biceps and Triceps in 8 Minutes
Summary
Jeff Cavaliere of ATHLEAN-X demonstrates a complete biceps and triceps workout that can be finished in under 8 minutes using only dumbbells, an incline bench, and a barbell in a squat rack. The workout is built around two superset circuits taken to failure, emphasizing eccentric overload and training intensity over workout duration. The session is designed for situations where time is limited but skipping training altogether is not an option.
Key Points
- Time constraints are not an excuse to skip training — an effective arm workout can be completed in as little as 8 minutes with the right approach
- Go to complete failure on every set — reps will naturally decrease as the workout progresses, which is expected and acceptable
- Superset biceps and triceps back-to-back — alternating between opposing muscle groups allows one to recover while the other works, maximizing efficiency
- Eccentric overload is a priority, especially when time is short — slow, controlled lowering phases deeply fatigue the muscle fibers
- Cheat curls are acceptable when used intentionally — using momentum on barbell curls enables heavier loading and greater eccentric stress on the biceps
- Workout length can be traded for intensity — shorter, harder sessions can be equally or more effective than long, moderate-effort workouts
- Equipment needed is minimal — a pair of dumbbells, an incline bench set to ~60 degrees, and a barbell in a squat rack
Exercise Details
Circuit 1: Dumbbell Superset (Incline Bench)
1. Incline Dumbbell Tricep Extension
- Target muscles: Triceps (overhead stretch position)
- Setup: Incline bench set to approximately 60 degrees; lie back with dumbbells
- Form cues: Achieve a full stretch on the triceps at the bottom of each rep
- Sets/reps: Continuous sets alternated with Spider Curls — taken to complete failure each time; expect reps to decrease with each set
- Common mistakes to avoid: Stopping before true failure; not getting a full stretch at the bottom
2. Spider Curl (Incline Bench)
- Target muscles: Biceps (peak contraction emphasis)
- Setup: Turn around and hang arms over the back of the incline bench, facing downward
- Form cues: Focus on peak contraction at the top of the curl — this is where maximum tension occurs
- Sets/reps: Alternated with Tricep Extensions to failure each set
- Common mistakes to avoid: Losing tension at the top; rushing through the contraction
Alternate between Exercise 1 and Exercise 2 continuously until no quality reps remain in either movement.
Circuit 2: Barbell + Bodyweight Superset (Squat Rack)
3. Barbell Cheat Curl
- Target muscles: Biceps
- Setup: Heavy barbell loaded in a squat rack (Jeff used 115 lbs)
- Form cues: Use controlled momentum to lift the bar; focus on a slow, deliberate eccentric (lowering) phase
- Sets/reps: Multiple sets to failure, alternated with Bodyweight Tricep Extensions; rep count will drop each round
- Common mistakes to avoid: Ignoring the eccentric — the lowering phase is where the primary training stimulus comes from in this context
4. Bodyweight Tricep Extension (Squat Rack)
- Target muscles: Triceps
- Setup: Use the racked barbell as a fixed bar; extend body out with legs behind you
- Form cues: Keep legs extended as far back as possible; emphasize the eccentric on the way down
- Sets/reps: Taken to failure each set, immediately following Barbell Curls
- Common mistakes to avoid: Standing up to rest between transitions — move directly from curls to extensions with no break
Continue alternating between Exercise 3 and Exercise 4 until total muscular fatigue is reached.