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Workout Description

6 Rounds for Time 1 Squat Snatch (70/50 kg) 6 Ring Muscle-Ups 11 calorie Assault Bike 64 Double-Unders 11 Burpees 6 Chest-to-Bar Pull-Ups 1 Squat Clean (70/50 kg)

Why This Workout Is Extremely Hard

This workout combines multiple high-skill, high-demand elements across 6 brutal rounds: squat snatches and squat cleans (70/50kg) bookend each round requiring technical precision under fatigue, while ring muscle-ups and chest-to-bar pull-ups create severe grip and pulling fatigue. The assault bike and 64 double-unders tax the lungs, and 11 burpees compound exhaustion. Cumulative fatigue across 6 rounds makes this elite-level only.

Benchmark Times for Scruff

  • Elite: <16:00
  • Advanced: 19:15-23:00
  • Intermediate: 28:00-34:30
  • Beginner: >82:30

Training Focus

This workout develops the following fitness attributes:

  • Stamina (8/10): High-rep gymnastics movements — 6 ring muscle-ups, 64 double-unders, 11 burpees, 6 chest-to-bar pull-ups per round — accumulate significant muscular endurance demands, especially in the upper body pulling musculature.
  • Power (8/10): Squat snatches and squat cleans are quintessential power movements. Ring muscle-ups also require explosive hip and pulling power. Power output is a recurring demand across multiple movements each round.
  • Endurance (7/10): Six rounds of assault bike calories, double-unders, and burpees create sustained cardiovascular demand. The continuous cycling between aerobic movements keeps heart rate elevated throughout the workout.
  • Flexibility (7/10): Squat snatches and squat cleans demand significant hip, ankle, and thoracic mobility. Full overhead squat position and front rack squat require above-average flexibility and range of motion.
  • Speed (6/10): For-time format incentivizes fast transitions and efficient cycling of gymnastics and cardio elements. Double-unders and burpees reward speed, though pacing across 6 rounds requires strategic management.
  • Strength (5/10): Single squat snatch and squat clean at 70/50 kg per round require meaningful strength, but the low rep count limits maximal strength stimulus. Moderate load relative to competitive standards.

Movements

  • Ring Muscle-Up
  • Squat Clean
  • Air Bike
  • Squat Snatch
  • Chest-to-Bar Pull-Up
  • Burpee
  • Double-Under

Scaling Options

Weight: Scale barbell to 50/35 kg or 60/42 kg depending on snatch and clean proficiency — the single-rep format means load should be challenging but technically sound every round. Gymnastics: Sub ring muscle-ups with 6 bar muscle-ups, 8 chest-to-bar pull-ups, or 10 banded ring dips + 6 strict pull-ups combo. Scale chest-to-bar to regular kipping pull-ups or 8 ring rows. Double-unders: Sub 128 single-unders or 32 attempts + 32 singles if still developing the skill. Volume: Reduce to 4-5 rounds if the athlete is newer or the time cap is a concern. Assault Bike: Keep calories as-is or reduce to 8 calories if the athlete is significantly limited on the bike.

Scaling Explanation

Scale the barbell if you cannot perform a technically sound squat snatch or squat clean at the prescribed weight when fresh — under fatigue across 6 rounds, technique will only deteriorate. Scale ring muscle-ups if you cannot string together at least 3 unbroken when fresh; failing reps repeatedly destroys your time and your shoulders. Scale double-unders if trips are costing you more than 60-90 seconds per round — the goal is to keep moving, not to practice under pressure. The target for scaled athletes is 30-40 minutes; if you're projected to go beyond 45 minutes, reduce rounds or volume. Prioritize movement quality on the barbell over intensity — a missed snatch or clean is a momentum killer. Intensity is the goal everywhere else.

Intended Stimulus

This is a moderate-to-long time domain grind, targeting roughly 25-40 minutes for competitive athletes. The workout demands a hard sustained effort across 6 rounds, blending technical barbell cycling, gymnastics skill, and pure conditioning. The primary challenge is multi-modal — you need to manage skill under fatigue (snatches and muscle-ups when your heart rate is spiking), sustain output on the bike and double-unders, and grind through burpees without mentally checking out. Expect your lungs and legs to be taxed simultaneously. This is a test of pacing intelligence as much as raw fitness.

Coach Insight

The squat snatch and squat clean are your anchors — treat them as controlled resets, not sprints. One rep means you can afford perfect technique every time; do not rush the setup. On ring muscle-ups, break early if needed — 3-3 or 4-2 is far smarter than failing a rep and burning 30 extra seconds. The Assault Bike at 11 calories should be attacked at a hard but sustainable pace — aim for consistent wattage across all 6 rounds rather than sprinting early rounds and dying late. Double-unders: find your rhythm immediately, don't panic on a trip — reset calmly and keep moving. Burpees are your mental test; set a steady pace (around 1 per 3-4 seconds) and never stop moving. Chest-to-bar pull-ups at the end of each round will feel brutal — break into 3-3 or 4-2 before your grip gives out. The biggest mistake athletes make is going too hot on rounds 1-2 and falling apart by round 4. Treat round 3 as your check-in: if you feel great, push rounds 4-6. Transitions between movements should be deliberate but quick — chalk up during burpees mentally, not after.

Benchmark Notes

Ring muscle-ups (36 total) and squat snatches under fatigue are the primary limiters. L5 (~38 min) assumes 2-3 rep muscle-up sets, singles on barbell movements, and steady but slow cycling and jump rope work across 6 rounds.

Modality Profile

7 total movements: Gymnastics = Ring Muscle-Up, Burpee, Chest-to-Bar Pull-Up, Double-Under (4 movements = ~57%); Monostructural = Air Bike (1 movement = ~14%); Weightlifting = Squat Snatch, Squat Clean (2 movements = ~29%). Rounded to nearest reasonable values: G: 43, M: 14, W: 43.

Similar Workouts to Scruff

If you enjoy Scruff, you might also like these similar CrossFit WODs:

  • Devil of Ramadi (90% similar) - For Time Buy-In: 100 ft Dumbbell Farmer's Carry (55/35 lb) 10 Alternating Dumbbell Squat Snatches (5...
  • Dale Gostick (90% similar) - 3 Rounds for Time (in teams of 3) 8 Muscle-Ups 5 Power Cleans (90/70 kg) 25 GHD Sit-Ups 25 Bar Over ...
  • Nunez (90% similar) - For time: 800m run 60 burpee box jump overs 50 pull-ups 40 squats (weight 1) 600m run 30 burpee box...
  • Corporal Ian Plank (89% similar) - 31-10-3 Reps for Time Power Snatches (80/55 kg) Bar Muscle-Ups...
  • Allan Tarasiewicz (89% similar) - 5 Rounds for Time 5 Power Cleans (135/95 lb) 5 Power Snatches (135/95 lb) 5 Squat Cleans (135/95 lb)...
  • Tripp (89% similar) - For Time 37 Burpees Then, 2 Rounds of: 10 Shoulder-to-Overheads (135/95 lb) 24 Medicine Ball Sit-Up...
  • Savard (89% similar) - AMRAP in 29 minutes 83 Double-Unders 27 Jumping Pull-Ups 10 Deadlifts (155/135 lb) 12 Hang Power Cle...
  • The Dean (89% similar) - 8 Rounds for Time 11 Single Dumbbell Box Step-Ups (50/35 lb) 22 Unbroken Double-Unders 2 Rope Climbs...

These WODs similar to Scruff share comparable training demands, time domains, and movement patterns.

6 Rounds for Time 1 Squat Snatch (70/50 kg) 6 Ring Muscle-Ups 11 calorie Assault Bike 64 Double-Unders 11 Burpees 6 Chest-to-Bar Pull-Ups 1 Squat Clean (70/50 kg)

Difficulty:
Extremely Hard
Modality:
G
M
W
Stimulus:

This is a moderate-to-long time domain grind, targeting roughly 25-40 minutes for competitive athletes. The workout demands a hard sustained effort across 6 rounds, blending technical barbell cycling, gymnastics skill, and pure conditioning. The primary challenge is multi-modal — you need to manage skill under fatigue (snatches and muscle-ups when your heart rate is spiking), sustain output on the bike and double-unders, and grind through burpees without mentally checking out. Expect your lungs and legs to be taxed simultaneously. This is a test of pacing intelligence as much as raw fitness.

Insight:

The squat snatch and squat clean are your anchors — treat them as controlled resets, not sprints. One rep means you can afford perfect technique every time; do not rush the setup. On ring muscle-ups, break early if needed — 3-3 or 4-2 is far smarter than failing a rep and burning 30 extra seconds. The Assault Bike at 11 calories should be attacked at a hard but sustainable pace — aim for consistent wattage across all 6 rounds rather than sprinting early rounds and dying late. Double-unders: find your rhythm immediately, don't panic on a trip — reset calmly and keep moving. Burpees are your mental test; set a steady pace (around 1 per 3-4 seconds) and never stop moving. Chest-to-bar pull-ups at the end of each round will feel brutal — break into 3-3 or 4-2 before your grip gives out. The biggest mistake athletes make is going too hot on rounds 1-2 and falling apart by round 4. Treat round 3 as your check-in: if you feel great, push rounds 4-6. Transitions between movements should be deliberate but quick — chalk up during burpees mentally, not after.

Scaling:

Weight: Scale barbell to 50/35 kg or 60/42 kg depending on snatch and clean proficiency — the single-rep format means load should be challenging but technically sound every round. Gymnastics: Sub ring muscle-ups with 6 bar muscle-ups, 8 chest-to-bar pull-ups, or 10 banded ring dips + 6 strict pull-ups combo. Scale chest-to-bar to regular kipping pull-ups or 8 ring rows. Double-unders: Sub 128 single-unders or 32 attempts + 32 singles if still developing the skill. Volume: Reduce to 4-5 rounds if the athlete is newer or the time cap is a concern. Assault Bike: Keep calories as-is or reduce to 8 calories if the athlete is significantly limited on the bike.

Time Distribution:
21:07Elite
38:45Target
1:22:30Time Cap
Your Scores:
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Training Profile

Performance Levels
L1
L2
L3
L4
L5
L6
L7
L8
L9
L10
RookieNoviceIntermediateAdvancedPro/Elite