Looking for a way to achieve a ripped, athletic stomach? If you want a stronger, tighter core (visible abs, slim waist, better posture, functional strength) Ab Ripper X, from P90X is still one of the most brutally intense 16 minute ab workouts you can do.
This Ab Ripper X no equipment, bodyweight only workout was designed by Tony Horton to target every aspect of your core with high repetitions, little rest, and maximum effort cardio — burning calories and building ridiculous amounts of stamina.
Done 3 days a week (Typically after upper body or full body days on P90X), and combined with nutrition and the rest of the P90X workout plan you will see dramatic results in your midsection.
Benefits of Ab Ripper X
- Deeply strengthens the entire core (rectus abdominis, obliques, transverse abdominis)
- Builds explosive rotational power and anti-rotation stability
- Targets the stubborn lower abs (pooch area) with high volume
- Improves hip flexor strength and pelvic control
- Increases overall endurance and mental toughness
- Burns serious calories in just 16 minutes (high metabolic demand)
- Requires zero equipment — only floor space and grit
The 10 Exercises – Detailed Breakdown
All exercises are performed back-to-back in a circuit with almost no rest (5–10 seconds max between moves). Tony calls for 25 reps on most moves (or max effort for timed ones). Total workout time: ~16 minutes when done at full intensity.
1. In & Outs Muscles
Targeted: Lower rectus abdominis (primary), hip flexors (iliopsoas), transverse abdominis
How to do it:
- Sit balanced on sit bones, knees bent ~90°, feet together and lifted 4–6 inches off floor.
- Hands flat on floor behind you (fingers forward or slightly out) for support.
- Lean torso back ~45° (chest up, shoulders relaxed).
- Contract abs → pull knees tight to chest (round lower back slightly, squeeze hard).
- Extend legs straight out low (hover toes ~2–4 inches above floor without touching).
- Repeat smoothly — no rocking hips or momentum.
- Reps: 25
Why it works: Constant tension during extension isolates lower abs; transverse abdominis braces against spinal shear — deep lower core activation, pelvic control, etched definition.
2. Seated Bicycles (Forward Bicycle Crunches)
Muscles Targeted: Obliques (external/internal), rectus abdominis, hip flexors
How to do it:
- Sit balanced on sit bones — knees bent, feet lifted ~6 inches, torso leaned back ~30–45°.
- Hands behind head (elbows wide — no neck pulling).
- Bring right elbow toward left knee while extending right leg straight and low.
- Simultaneously pedal: switch to left elbow toward right knee, extend left leg.
- Cycle smoothly forward (like pedaling a bike).
- One rep = each knee cycling back once (count left knee return).
- Reps: 25
Why it works: Rotational flexion + dynamic leg movement recruits obliques powerfully while engaging full rectus — improves coordination, rotational strength, balanced side sculpting.
3. Reverse Bicycle
Muscles Targeted: Obliques (shifted fiber emphasis), rectus abdominis, hip flexors
How to do it:
- Exact same starting position as forward bicycles.
- Pedal in reverse direction: opposite elbow to knee cycles backward.
- Maintain smooth, controlled pedaling — no rushing or momentum.
- Focus on twisting fully each rep.
- Reps: 25
Why it works: Reverse direction changes oblique pull angle — recruits fibers differently, avoids imbalances, enhances lateral stability, adds variety for symmetrical core development.
4. Crunchy Frog
Muscles Targeted: Full rectus abdominis, transverse abdominis, hip flexors
How to do it:
- Sit balanced on sit bones — knees bent toward chest, feet/legs lifted off floor (balance challenge).
- Extend both arms straight forward at shoulder height (palms facing in).
- Pull knees tighter to chest while wrapping arms around shins (hug tightly like a frog).
- Squeeze abs intensely at peak contraction.
- Extend legs straight out in front and arms forward again (keep torso leaned back).
- Repeat with full control — no dropping feet or losing balance.
- Reps: 25
Why it works: Hug creates maximal shortening/peak contraction; extension demands isometric hold — promotes explosive core power, deep engagement, total ab activation.
5. Cross Leg / Wide Leg Sit-Ups
Muscles Targeted: Upper rectus abdominis, obliques
How to do it:
- Lie supine — legs wide in V-shape (or crossed at ankles for variation).
- Hands behind head, elbows wide (do not pull neck).
- Curl up into full sit-up (roll shoulders off floor).
- Twist torso → bring right elbow toward left knee/leg (or inner thigh).
- Lower controlled (vertebra by vertebra).
- Alternate sides.
- Reps: 25 (alternating)
Why it works: Wide base increases range for deeper upper ab flexion; twist adds rotation — builds upper core power, oblique torque, athletic twisting strength.
6. Fifer Scissor
Muscles Targeted: Lower rectus abdominis, hip flexors, obliques (stabilization)
How to do it:
- Lie supine — legs straight and lifted perpendicular to floor (~90°), hands behind head (elbows wide).
- Pull one straight leg toward chest/forehead (keep leg straight, flex foot).
- Simultaneously lower opposite leg low (hover ~2–4 inches, no touch).
- Switch rapidly (scissor motion) — legs stay elevated and straight.
- Reps: 25 (each switch = 1 rep)
Why it works: Constant straight-leg tension isolates lower abs; dynamic scissoring adds control challenge — builds endurance, carves deep lower ab lines.
7. Hip Rock and Raise
Muscles Targeted: Lower rectus abdominis, hip flexors, transverse abdominis
How to do it:
- Lie supine — legs straight up to ceiling, arms at sides (palms down).
- Gently rock hips side to side (small range to warm/pre-fatigue).
- Thrust hips upward explosively (push heels to sky, lift lower back slightly).
- Lower hips controlled.
- Reps: 25
Why it works: Rocking pre-fatigues hips/lower abs; explosive raise targets flexion deeply — improves hip mobility, core power, pelvic control.
8. Pulse-Ups
Muscles Targeted: Lower rectus abdominis, transverse abdominis
How to do it:
- Lie supine — legs straight up to ceiling, arms at sides (or under hips).
- Pulse hips upward in small, quick, controlled lifts (heels toward sky, 2–4 inch range).
- Keep legs straight, core braced — no big swings or momentum.
- Reps: 25
Why it works: Small, sustained pulses maintain constant tension — intense burning isolation for lower ab endurance and sharp definition.
9. Roll-Up / V-Up Combo
Muscles Targeted: Full rectus abdominis (upper + lower), hip flexors, transverse abdominis
How to do it:
- Lie flat — arms extended overhead, legs straight.
- Roll up sequentially (head → shoulders → mid-back → lower back) to seated (reach hands to toes).
- Lift legs/arms into V-shape fold (reach hands to feet).
- Lower controlled — reverse V-fold, roll down vertebra by vertebra.
- Reps: 12 combos (24 total movements)
Why it works: Full-core strength from extended to contracted positions — boosts flexibility, coordination, explosive power.
10. Oblique V-Up
Muscles Targeted: Obliques (external/internal), quadratus lumborum, rectus abdominis (lateral)
How to do it:
- Lie on right side — legs stacked straight, bottom arm extended forward, top hand behind head.
- Simultaneously lift legs (straight) and upper body (crunch side) — right elbow toward right knee/hip.
- Squeeze obliques hard at top.
- Lower controlled (no drop).
- Switch sides.
- Reps: 25 per side
Why it works: Lateral flexion + leg lift sculpts obliques for tapered waist, strengthens side stabilizers, improves rotational function.
How to Access Ab Ripper X
- Stream the original Tony Horton version on BODi (Beachbody on Demand) — subscribe for full P90X access.
- Free guided follow-alongs on YouTube — search “Ab Ripper X full workout” or “P90X Ab Ripper X recreation” (channels like Get Fit with Ashley or official Beachbody uploads).
- Printable worksheets — search “P90X Ab Ripper X worksheet PDF” for tracking reps/progress.
Conclusion
Ab Ripper X is short, brutal, and legendary for a reason. It works. You’ll build true core strength, improved posture, better performance, and a ripped look you can actually see (nutrition being proper of course). It burns, but it’s also incredibly rewarding. Do where you’re at, with good form, consistently (aim for 3–6× a week), eat well, and recover. Hit play. Get pumped. Eat shake. Abs will thank you.
