Workout Description
21-15-9Sumo DL42-30-18Double unders 21-15-9GHD sit-up
Why This Workout Is Hard
The critical factor here is 45 total GHD sit-ups (21-15-9), which is genuinely dangerous for many average athletes and a known vector for rhabdomyolysis. Combined with 45 sumo deadlifts, the posterior chain and hip flexors are hammered repeatedly — the deadlifts pre-fatigue the hips before GHDs demand full hip extension range under load. Double unders offer brief relief but don't allow meaningful recovery between the two demanding movements.
Training Focus
This workout develops the following fitness attributes:
- Stamina (8/10): Forty-five GHD sit-ups devastate core stamina, 90 double unders fatigue calves and shoulders, and 45 sumo deadlifts tax the posterior chain — cumulative muscular endurance across multiple muscle groups is the primary challenge.
- Flexibility (6/10): GHD sit-ups demand significant hip flexor length and spinal extension range of motion. Sumo deadlifts require notable hip and groin mobility. This workout has above-average flexibility requirements compared to typical WODs.
- Endurance (5/10): The double unders (90 total) spike heart rate continuously while sumo deadlifts and GHD sit-ups sustain cardiovascular demand throughout. Moderate aerobic challenge typical of a mid-duration 21-15-9 chipper.
- Strength (5/10): Sumo deadlifts at moderate loading provide meaningful posterior chain strength demand across 45 total reps. Not maximal effort, but heavier loading than pure bodyweight movements creates real strength stimulus.
- Speed (5/10): Double unders reward fast, consistent rope cycling, and the 21-15-9 descending rep scheme encourages quick transitions between movements. Pacing strategy and efficient movement cycling are important but not sprint-level demands.
- Power (4/10): Double unders require rhythmic leg explosiveness, and sumo deadlifts can be driven powerfully off the floor. However, the rep volume shifts emphasis away from pure power toward sustained output rather than explosive bursts.
Movements
- Sumo Deadlift
- GHD Sit-Up
- Double-Under
Modality Profile
3 movements total: Double-Unders (G) and GHD Sit-Ups (G) = 2 Gymnastics movements; Sumo Deadlift (W) = 1 Weightlifting movement. No monostructural movements. G: 2/3 = 67% → 70%, W: 1/3 = 33% → 30%.
Training Profile
| Attribute | Score | Explanation |
|---|---|---|
| Endurance | 5/10 | The double unders (90 total) spike heart rate continuously while sumo deadlifts and GHD sit-ups sustain cardiovascular demand throughout. Moderate aerobic challenge typical of a mid-duration 21-15-9 chipper. |
| Stamina | 8/10 | Forty-five GHD sit-ups devastate core stamina, 90 double unders fatigue calves and shoulders, and 45 sumo deadlifts tax the posterior chain — cumulative muscular endurance across multiple muscle groups is the primary challenge. |
| Strength | 5/10 | Sumo deadlifts at moderate loading provide meaningful posterior chain strength demand across 45 total reps. Not maximal effort, but heavier loading than pure bodyweight movements creates real strength stimulus. |
| Flexibility | 6/10 | GHD sit-ups demand significant hip flexor length and spinal extension range of motion. Sumo deadlifts require notable hip and groin mobility. This workout has above-average flexibility requirements compared to typical WODs. |
| Power | 4/10 | Double unders require rhythmic leg explosiveness, and sumo deadlifts can be driven powerfully off the floor. However, the rep volume shifts emphasis away from pure power toward sustained output rather than explosive bursts. |
| Speed | 5/10 | Double unders reward fast, consistent rope cycling, and the 21-15-9 descending rep scheme encourages quick transitions between movements. Pacing strategy and efficient movement cycling are important but not sprint-level demands. |
21-15-9Sumo DL42-30-18Double unders 21-15-9GHD sit-up
Difficulty:
Hard
Modality:
G
W
Your Scores: