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

For a woman at 135 to 160 pounds in a recomp, I train chest with incline dumbbell presses, low-to-high cable flies and push-ups. Do it on upper 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 between 135 and 160 pounds who has been told that chest training will make your breasts smaller or your frame look masculine, I want to address that directly before I go any further: chest training does not reduce breast tissue. Breast tissue is primarily fat and glandular tissue. The muscle that develops underneath it, the pectoralis major, lifts and projects that breast tissue forward, creating a higher, more supported appearance.

You are in the recomp phase at 135 to 160 pounds. Your chest training goal is to develop the pectoralis major, specifically the upper portion, in a way that lifts and defines the chest region, improves posture, and contributes to the overall upper body structure that makes every article of clothing look better on your frame.

What muscles are you training in your chest?

The pectoralis major has two distinct portions. The clavicular head (upper chest) originates at your collarbone and runs diagonally down to your upper arm. It is responsible for the fullness below your collarbone that creates the three-dimensional, developed appearance of the upper chest. The sternal head (lower chest) originates along your sternum and ribs and creates the definition along the bottom border of your chest.

For women in the Slim archetype, upper chest development is the priority for one anatomical reason: the upper chest sits above your breast tissue, and when developed, it creates a structural shelf that supports and lifts the breast tissue above it. This is the muscular equivalent of support structure. Lower chest development adds definition to the underbust line but is secondary to the upper chest for the visual outcome you are training toward.

All pressing movements work both portions of the pectoralis major, but the angle of the press shifts emphasis: flat press emphasizes the sternal head, incline press at 30 to 45 degrees maximizes clavicular head stimulus. Your protocol is incline-dominant.

How does body shape change chest training?

Pear Shape

Upper chest development widens the shoulder-chest region and creates visual upper body expansion that counterbalances your wider lower body. This is a high-priority area for your shape. Push upper chest volume on your Upper days.

Hourglass Shape

Chest development adds definition without fundamentally altering your balanced proportions. Full range incline and flat pressing provides complete development. Four sets of incline work, two sets flat.

Inverted Triangle Shape

Your upper body is already wide. Chest training develops depth, the three-dimensional fullness, rather than width. Moderate volume is appropriate: three to four total working sets twice per week.

What is the exact chest workout for Slim?

Exercise 1: Incline Dumbbell Press

Set a bench to 30 to 45 degrees. Lie back with a dumbbell in each hand at shoulder height, elbows at 45 degrees from your torso, not flared out to 90 degrees (that stresses your shoulder joint). Press both dumbbells upward and slightly inward until they nearly touch above your upper chest. Lower under control, feeling the full stretch across your upper chest at the bottom.

Sets: 4. Reps: 10. Rest: 90 seconds. Starting weight: 15 to 20 pounds per hand. Progressive overload: add 2.5 to 5 pounds when all 4 sets of 10 are completed. Common mistake: elbows flared to 90 degrees, that stresses your rotator cuff and reduces pectoral contribution.

Exercise 2: Cable Chest Fly (Low-to-High)

Set cables at the lowest position. Stand centered between two cable stacks, holding one handle in each hand with palms facing up, arms slightly in front of your body. Bring both handles upward and inward in an arc, crossing them in front of your upper chest. The crossing movement at the end provides peak contraction that dumbbells cannot replicate. Hold the crossed position for one second, return slowly. This movement trains the clavicular head through its full range with consistent resistance.

Sets: 3. Reps: 15. Rest: 60 seconds. Starting weight: 10 pounds per side. Progressive overload: add 2.5 pounds when all reps are completed with a full second contraction at the top. Common mistake: bending your elbows to help lift, keep a slight, fixed elbow bend, move only at the shoulder joint.

Exercise 3: Push-Up to Failure

Full push-up from your toes, hands slightly wider than shoulder width. Your body forms a straight line from head to heels throughout. Lower your chest to within one inch of the floor. Press back to start. If full push-ups cannot be performed with strict form, begin from your knees with the same hand placement and a straight line from knees to head. One set to failure at the end of your chest session measures your current pressing capacity and provides bodyweight training stimulus.

Sets: 1 to failure. Rest: N/A, this ends the session. Progressive overload: once you can complete 20 consecutive full push-ups, add a weighted vest or raise your feet on a bench for decline push-ups. Common mistake: allowing your hips to sag or pike, the straight-body line is the exercise’s integrity requirement.

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

Week 4: Visible improvement in posture, your chest lifts, shoulders pull back.

Week 12: Upper chest definition visible in tank tops and fitted clothing.

What should you read next?

Pair this with Slim shoulders training and Slim triceps 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.