Abs Training for the Slim Woman: 135 to 160 lbs, Recomp Phase

For a woman at 135 to 160 pounds in a recomp, I train abs with cable crunches, dead bugs, Pallof presses, hanging knee raises and hollow holds. Do it on lower body days of a four-day upper/lower split, add weight when every set reaches the top of the rep range, and expect visible change in about 8 to 12 weeks.

Slim is my name for women between 135 and 160 pounds, usually a pear, hourglass or inverted triangle shape, in a recomp phase: losing fat and building muscle at the same time on 1,700 to 2,000 calories and 120 to 145 grams of protein a day.

If you’re a woman carrying 135 to 160 pounds and you’ve been doing crunches for months wondering why your midsection doesn’t look any different, I need to tell you something your last fitness app wasn’t designed to tell you: the problem isn’t your dedication. The problem is that you’ve been training the wrong part of the muscle for the wrong goal, and you’ve almost certainly been under-eating protein while doing it.

I’ve worked with enough women in exactly your weight range to know that the abs conversation for the Slim archetype is one of the most misunderstood in all of fitness. This problem isn’t unique to Houston, it’s everywhere.

You are in the Slim archetype. That means your weight falls between 135 and 160 pounds, your body is most likely a Pear, Hourglass, or Inverted Triangle shape, and your primary goal right now is recomposition, simultaneously reducing body fat and building lean muscle. The scale may barely move during this phase. That is not failure. That is the process working. You are trading fat for muscle at approximately the same total weight, and the abdominal musculature is one of the most visually responsive areas to that trade, when you train it correctly.

What muscles are you training in your abs?

The abdominal region is not one muscle. It is a system of four distinct muscles, and training only one of them, which is what most crunch-based routines do, produces a fraction of the result available to you.

The rectus abdominis is the muscle most people think of when they say “abs.” It runs vertically from your sternum down to your pubic bone. It flexes your spine, that curl-up motion. It responds to spinal flexion exercises: crunches, cable crunches, hanging leg raises.

The transverse abdominis is the one most people skip. It wraps around your entire midsection like a corset. It does not produce movement, it increases intra-abdominal pressure, compressing your waist from the inside. Training it helps you brace and control your midsection. Your waist measurement still mostly comes down to body fat.

The obliques, external and internal, run diagonally from your lower ribs toward your pelvis. They control rotation and lateral bending. Well-developed obliques create the V-taper lines from your ribs down to your hip bones. Underdeveloped obliques leave the midsection looking flat even when body fat is low.

How does body shape change abs training?

Pear Shape (135 to 160 lbs)

You carry weight in your hips, thighs, and lower body, while your waist and upper abdomen are relatively lean. Your goal: develop the upper rectus abdominis to create visible definition in the already-leaner upper midsection, and develop the transverse abdominis to narrow your waist further. Avoid heavy lateral oblique work, it can widen your waist. Realistic timeline to visible change: 6 to 8 weeks.

Hourglass Shape (135 to 160 lbs)

Your waist is naturally smaller than both your shoulders and hips. You already have the taper, your job is to deepen and define it until it looks intentional and muscular. Full abdominal development is appropriate for you: upper abs, lower abs, transverse, and obliques. Heavy oblique work is acceptable because your waist-to-hip ratio means you won’t lose the taper. Timeline: 4 to 6 weeks for oblique definition, 6 to 10 weeks for full rectus definition.

Inverted Triangle Shape (135 to 160 lbs)

You carry most of your weight in your shoulders and upper body; your hips are narrower. Your priority is the lower rectus abdominis and the transverse abdominis. Strong lower abs create the visual line at the base of your midsection that balances a broader upper body. Avoid heavy oblique work, it will add width where you do not want it. Timeline: 8 to 10 weeks for lower ab definition.

Is Ab Training the Right Priority for You Right Now?

If you’re not sure whether to dedicate training focus to your abs at this stage, here is how to decide. First, if your body fat is above 28%, your primary focus should be compound resistance movements and dietary adherence, ab training is still good for posture and stability, but not yet your visual priority. Second, if you experience lower back pain during lower body training, transverse abdominis work should be a high priority, weak transverse is a major cause of lumbar pain. Third, if your waist is already your strongest visual asset, ab training is maintenance, not transformation. Three sets per week of varied ab work is sufficient.

What is the exact abs workout for Slim?

Before the numbers: a rep is one complete movement. A set is a group of reps. Progressive overload means adding demand (more weight, more reps, less rest) to force adaptation. Your body adapts to a stimulus and stops changing. Progressive overload is the mechanism that keeps you moving forward.

Exercise 1: Cable Crunch

Kneel in front of a cable machine with the rope attachment set at the highest position. Grip the rope handles and bring them to either side of your head, elbows pointed toward the floor. Contract your abs and flex your spine downward, driving your elbows toward your knees. The movement comes entirely from your spine curling, do not pull with your arms or rock your hips. Hold the bottom for one second, then return under control.

Sets: 4. Reps: 12. Rest: 60 seconds. Starting weight: 30 pounds. Progressive overload: add 5 pounds every time you complete all 4 sets of 12 with controlled form. Common mistake: using hip flexion instead of spinal flexion, if your hip flexors are working harder than your abs, bring the attachment point higher.

Exercise 2: Dead Bug

Lie on your back with both arms raised toward the ceiling and both knees bent to 90 degrees above your hips (shins parallel to the floor). As you exhale, slowly lower your right arm overhead while simultaneously extending your left leg straight, lowering it toward but not touching the floor. Your lower back must remain pressed flat against the mat, that is your transverse abdominis working. Inhale as you return to start, then repeat on the opposite side.

Sets: 3. Reps: 10 per side. Rest: 45 seconds. Progressive overload: add 2-pound ankle weights to the leg after four sessions of perfect form. Common mistake: allowing the lower back to arch off the floor, reduce your range of motion until you can keep it flat.

Exercise 3: Pallof Press

Set a cable or band at chest height. Stand perpendicular to the anchor (left shoulder toward machine for first set). Hold the handle against your sternum, elbows bent. Step away to create tension. Press the handle straight out from your chest until arms are fully extended, hold two seconds, then return to your sternum. The cable pulls you sideways, your entire job is to resist that pull. This is an anti-rotation exercise, which develops obliques without adding lateral width.

Sets: 3 per side. Reps: 12. Rest: 45 seconds between sides. Starting weight: 20 pounds. Progressive overload: add 5 pounds when all sets are completed with no hip shift. Common mistake: letting your hips rotate toward the anchor, keep them square to the front.

Exercise 4: Hanging Knee Raise

Hang from a pull-up bar with both hands, arms fully extended, body straight. If grip is an issue, use ab straps. Exhale, contract your lower abdomen, and raise both knees toward your chest. Do not swing. Hold the top for one second, then lower under control. This targets the lower rectus abdominis, the area below your navel that floor crunches never reach effectively.

Sets: 3. Reps: 12. Rest: 60 seconds. Progressive overload: once you complete 3 sets of 15 with strict form, progress to hanging leg raises (legs straight). Common mistake: using hip flexors and momentum, slow the movement to a 3-second rise and 3-second lower.

Exercise 5: Hollow Body Hold

Lie on your back with arms extended overhead and legs straight on the floor. Simultaneously raise your arms, shoulders, and legs off the floor until only your lower back is in contact with the mat, your body should curve like a banana toward the floor, not an arch. Your lower back must press flat. Hold.

Sets: 3. Time: 20 seconds. Rest: 45 seconds. Progressive overload: add 5 seconds per session until you reach 45 seconds, then add light ankle weights. Common mistake: lower back arching, raise your legs higher toward the ceiling until you can maintain contact.

How do abs fit into your training week?

Integrate this ab protocol into your existing upper/lower Split (Monday Upper, Tuesday Lower, Thursday Upper, Friday Lower). Place cable crunch and dead bug on Upper days after your primary pressing and pulling work. Place hanging knee raise, Pallof press, and hollow body hold on Lower days after squats and hinges. Total weekly ab training: about 30 minutes across four sessions. No isolated ab day, your abs are already working as secondary stabilizers on every compound movement.

What should you expect at week 1, week 4 and week 12?

Week 1: Delayed onset soreness (DOMS) in your rectus abdominis and obliques, normal. Your core stability during squats and overhead presses will improve noticeably.

Week 4: Transverse abdominis work produces visible waist narrowing, especially in the morning. Your Pallof press weight should be up 5 to 10 pounds.

Week 12: Upper rectus definition begins to emerge (assuming you’re in a modest caloric deficit). Lower abs take longer, 16 to 24 weeks at this weight range.

Signs it is working: Waist measurement decreases while weight stays the same or drops only slightly. You feel your abs working during compound movements where you previously felt nothing. Cable crunch weight has increased by at least 15 pounds.

Signs it is not working: No change in waist measurement at Week 6. No strength increase on any exercise. If that happens, check your protein (need 120 to 145g daily), sleep (under 7 hours kills results), or hidden calories.

If you want the dietary framework that makes these abs visible, the high-protein protocol is the most direct support for muscle preservation during fat loss.

What should you read next?

Pair this with Slim obliques training and Slim glutes training, and see the high protein diet for Slim. To work with me, start with the XPL quiz, which is my intake form for every client and confirms whether Slim is your category, then see coaching options and pricing.

Written by Zavier King, personal trainer in Houston and online coach at XPL. ISSA Certified Personal Trainer and NASM Nutrition Coach.