Bodybuilding Isolation Block

A 6-week, 4-day-per-week specialisation program built entirely from isolation exercises. Each session focuses on a single muscle region; no compound movements are prescribed. The program is designed for intermediate and advanced bodybuilders who have an established strength base and want to bring up lagging isolation muscles — particularly chest detail, shoulder roundness, arm development, and leg isolation work.

Who This Program Is For

• Intermediate/advanced bodybuilders running a compound strength base (e.g., 5/3/1, Texas Method) as a concurrent isolation layer
• Athletes completing a strength block who want a hypertrophy-focused deload/transition phase
• Bodybuilders with specific lagging body parts that compound movements under-develop

Not for beginners. Isolation work produces limited overall hypertrophy compared to compound movements. Beginners should run beginner_fullbody_hypertrophy or push_pull_legs first.

Weekly Structure

Day	Session	Total working sets
Monday	Day A — Chest Isolation	14–18 sets
Tuesday	Day B — Shoulders Isolation	12–16 sets
Thursday	Day C — Arms (Biceps + Triceps)	18–24 sets
Saturday	Day D — Legs Isolation	14–18 sets

Rest at least one day between sessions. The Tuesday/Thursday gap is intentional — shoulders (Day B) need 48 h before the triceps overhead work on Day C.

How to Select Exercises Per Day

Each day lists a core group (primary + secondary) and an optional group (accessory). Run the core group every session. Rotate accessory exercises in and out every 2–3 weeks based on lagging areas.

Day A — Chest Isolation

Core (choose 4):

Exercise	Sets × Reps	Key cue
Dumbbell Fly	4 × 10–15	Slight fixed elbow bend; control the eccentric
Incline Dumbbell Fly	3 × 12–15	30–45° bench; upper pec bias
Flat Bench Cable Fly	3 × 12–15	Constant tension; low pulleys
Butterfly (Pec Deck)	3 × 12–15	Peak contraction + 1-second squeeze

Optional (rotate in 1–2):

Exercise	Sets × Reps	When to use
Decline Dumbbell Fly	2–3 × 12–15	Lower pec lagging
Incline Cable Fly	2–3 × 12–15	Prefer constant tension over stretch
One-Arm Flat Bench Dumbbell Fly	2 × 12–15/side	Left/right imbalance present

Day B — Shoulders Isolation

Core (all 4):

Exercise	Sets × Reps	Key cue
Seated Side Lateral Raise	4 × 12–20	Raise to shoulder height only; elbow leads
Cable Seated Lateral Raise	3 × 15–20	Constant tension in bottom range
Seated Bent-Over Rear Delt Raise	4 × 15–20	Torso parallel to floor; elbows lead
Front Cable Raise	3 × 12–15	Only if anterior delt is genuinely lagging

Optional:

Exercise	Sets × Reps	When to use
Bent-Over DB Rear Delt Raise (head on bench)	2–3 × 15–20	Strictest rear delt technique; swap when lower back fatigued

Day C — Arms: Biceps + Triceps

Run biceps first, then triceps. Choose 3–4 exercises from each group.

Biceps (core — choose 3):

Exercise	Sets × Reps	Key cue
Dumbbell Bicep Curl	4 × 10–15	Supinate at midpoint; elbow fixed
Incline Dumbbell Curl	3 × 10–15	Long-head stretch; arm behind torso at bottom
Concentration Curl	3 × 12–15	Peak contraction; full supination
Cable Preacher Curl	3 × 10–15	Constant tension in lengthened position

Biceps (optional — rotate 1):

Exercise	Sets × Reps	When to use
EZ Bar Curl	3 × 10–12	Heavier load priority; wrist comfort
Drag Curl	2 × 12–15	Brachialis and long-head emphasis
Chin-Up	3 × 8–12	Vertical pull stimulus; add if strength base needed

Triceps (core — choose 3–4):

Exercise	Sets × Reps	Key cue
Cable Rope Overhead Extension	4 × 12–15	Long head fully lengthened; elbows close
Decline EZ Bar Triceps Extension	3 × 10–12	Long head stretch; controlled descent
Cable Lying Triceps Extension	3 × 12–15	Constant tension at lockout
Tricep Dumbbell Kickback	2 × 15–20	Full lockout; 1-second peak hold

Triceps (optional — rotate 1):

Exercise	Sets × Reps	When to use
Kneeling Cable Triceps Extension	2–3 × 15–20	Strictest form; no lower body involvement
Cable One-Arm Triceps Extension	2 × 15–20/arm	Bilateral imbalance present

Day D — Legs Isolation

Core (choose 4–5):

Exercise	Sets × Reps	Key cue
Lying Leg Curl	4 × 10–15	Plantarflex ankle during curl; slow eccentric
Single-Leg Leg Extension	3 × 12–15/leg	Full extension; do not snap to lockout
Glute-Ham Raise	3 × 6–10	Hips extended; band assistance if needed
Standing Calf Raise	4 × 15–20	Full heel drop; 3–4 s eccentric
Donkey Calf Raise	3 × 15–20	Deep stretch; hip-hinge position

Optional:

Exercise	Sets × Reps	When to use
Standing Leg Curl	3 × 12–15/leg	Substitute or add for extra hamstring unilateral volume

Progression Over 6 Weeks

Weeks	Strategy
1–2	Establish baselines. Use loads where the top of the rep range is just achievable.
3–4	Apply double-progression: advance load when top of range achieved. Introduce one optional exercise per day.
5–6	Max accumulation. Add one set to core exercises if recovery allows. Rotate optional exercises to address weakest area.

Integration With a Compound Program

This block pairs with any 2–3 day/week heavy compound program (e.g., 5/3/1 Mon/Wed/Fri):

Mon: Compound strength (5/3/1 squat + deadlift)
Tue: Day A — Chest Isolation
Wed: Compound strength (5/3/1 bench + press)
Thu: Day B — Shoulders Isolation
Fri: Compound strength (5/3/1 squat + deadlift)
Sat: Day C — Arms
Sun: Day D — Legs Isolation

Rest/frequency can be adjusted — the isolation days are low-systemic-fatigue and recover quickly.

For compound-based hypertrophy, see push_pull_legs or phul. For power-hypertrophy blend, see phat.