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Side Delts Training for the Slim Woman: 135–160 lbs, Recomp Phase

May 28, 2026 · By Xavier Savage · Slim

Side Delts Training for the Slim Woman: 135–160 lbs, Recomp Phase

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If you have read the full shoulder protocol and you want to go deeper on the lateral deltoid specifically – the muscle that creates shoulder width and makes your waist look narrower by contrast – this article is that deeper dive.

I’m Xavier Savage, a personal trainer based in Houston, Texas. The lateral deltoid is isolated only by lateral raise movements. No compound exercise – no bench press, no overhead press, no row, no pull‑up – trains it significantly. If you are not doing dedicated lateral raises with progressive overload, your lateral deltoids are not being trained. Full stop. I work with women across the US, Canada, and the UK through XPL online programming, and under‑trained lateral delts are the most common missed proportioning opportunity I find in new clients regardless of how long they have been training.

Lateral Delt Anatomy

The lateral deltoid originates along the acromion – the bony point of your shoulder – and inserts at your upper arm alongside the other deltoid heads. Its function is shoulder abduction: raising your arm out to the side away from your body. This is the only movement that isolates the lateral deltoid. Pressing movements (bench press, overhead press) work the anterior deltoid and the lateral deltoid in the lower portion of the pressing range but do not produce the full abduction movement needed for complete lateral head development. Lateral raises in various forms are the only way to develop shoulder width.

The Exact Side Delts Protocol

Exercise 1: Cable Lateral Raise (One Arm)

Set a low cable pulley. Stand beside the machine, holding the cable handle in the far hand – the hand on the opposite side from the machine. Your arm crosses in front of your body at the start position. Raise the handle out to the side and upward until your arm reaches shoulder height. The cable provides resistance throughout the full range of motion, including the bottom position where dumbbells provide minimal resistance. Lower slowly. Switch sides.

Sets: 4 per side. Reps: 15. Rest: 45 seconds between sides. Starting weight: 10‑15 pounds. Progressive overload: add 2‑3 pounds monthly. Common mistake: using hip lean or body momentum – if you must sway to lift the weight, reduce it.

Exercise 2: Dumbbell Lateral Raise (Drop Set)

Perform 10 reps at your working weight. Immediately drop to a lighter dumbbell – typically 2‑4 pounds lighter – and perform 10 more reps without rest. This is a drop set: two consecutive sets at different weights with no rest between them. Drop sets extend the effective working volume beyond what a single weight allows and are particularly effective for smaller muscles like the lateral deltoid.

Sets: 3 drop sets. Reps: 10 heavy + 10 lighter. Rest: 90 seconds between drop sets. Common mistake: the drop weight being too close to the working weight, preventing additional reps.

Exercise 3: Machine Lateral Raise

On a lateral raise machine, position yourself so the pads rest on your forearms just above your elbow. Set the seat height so your elbows align with your shoulder joint when your arms are at rest. Raise both arms simultaneously to shoulder height and hold for 1 second. Lower slowly. Machine lateral raises allow heavier loading than dumbbells and eliminate grip and momentum variables.

Sets: 3. Reps: 12. Rest: 60 seconds. Starting weight: machine‑dependent – find a weight that makes rep 10‑12 challenging. Progressive overload: add one weight increment when all 3 sets of 12 are completed.

Timeline

Week 4: Visible increase in shoulder width in photos.

Week 12: Clear lateral delt development visible in tank tops and bare‑shoulder clothing. Waist‑to‑shoulder ratio measurably improved.

For complete shoulder development, pair this with the full shoulders protocol. For the dietary context supporting shoulder development during recomp, the high‑protein protocol is the most relevant. Take the XPL Archetype Quiz to confirm your current phase.

I train clients in person in Houston, Texas and work with people across the US, Canada, and the UK online through XPL. Take the XPL Archetype Quiz to get your exact protocol, or visit xperformancelab.com/plans-pricing to work with me directly.

The standards behind the standards. — Xavier Savage, XPL Xesthetic Performance Labs, Houston, TX

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Xavier Savage

Founder, XPERFORMANCELAB

I do not shape muscle. I shape structure. The person you become is the person you construct.

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