Landmine Single-Arm Low Fly: Form, Sets & Reps, Tips & FAQ

Master the Landmine Single-Arm Low Fly for chest growth with a joint-friendly arc. Learn setup, step-by-step form cues, sets by goal, common mistakes, FAQs, and recommended gear.

Landmine Single-Arm Low Fly: Form, Sets & Reps, Tips & FAQ

Chest Isolation

Landmine Single-Arm Low Fly

Intermediate Landmine + Barbell Hypertrophy / Control / Shoulder-Friendly Arc

The Landmine Single-Arm Low Fly is a unilateral chest-builder that uses the landmine’s guided arc to train pec adduction with a more joint-friendly feel than many free-weight fly variations. You’ll sweep the arm from a low, slightly-out position toward the midline, keeping a soft elbow and a stable torso. Think: hug and squeeze the chest—not “press and lock out.”

This exercise is all about smooth tension and clean positioning. You should feel the chest doing most of the work—especially through the mid-range and squeeze—while the shoulder stays down and back (no shrugging). Because it’s unilateral, your core will also work to resist rotation.

Safety tip: Stop if you feel sharp shoulder pain, pinching at the front of the shoulder, numbness/tingling, or pain radiating down the arm. Keep the movement controlled and avoid forcing a deep stretch.

Quick Overview

Body Part	Chest
Primary Muscle	Pectoralis major (sternal fibers; “mid/lower chest” emphasis depending on arc)
Secondary Muscle	Anterior deltoid, serratus anterior (stability), core/obliques (anti-rotation), forearm/grip
Equipment	Landmine setup + barbell + plates (optional: landmine handle)
Difficulty	Intermediate (best with controlled tempo and stable positioning)

Sets & Reps (By Goal)

Hypertrophy (main work): 3–4 sets × 8–12 reps/side (60–90 sec rest)
Strength emphasis (heavier, still controlled): 4–5 sets × 6–8 reps/side (90–120 sec rest)
Chest activation / warm-up: 2–3 sets × 12–15 reps/side (30–60 sec rest)
Control + anti-rotation focus: 2–3 sets × 10–12 reps/side (slow eccentric, 45–75 sec rest)

Progression rule: Add reps first, then small weight jumps. Keep the same smooth path and shoulder position. If you have to twist, shrug, or “press” to finish reps, the load is too heavy.

Setup / Starting Position

Anchor the bar: Place one end of the barbell in a landmine base (or a sturdy corner setup).
Stance: Stand with a slight split stance for balance. Keep knees soft and core braced.
Grip: Hold the sleeve end of the bar (or a landmine handle). Wrist neutral and grip firm.
Shoulder position: Pull the shoulder down and back (packed). No shrugging.
Start low: Working hand begins low and slightly away from the body. Maintain a soft elbow (10–20° bend).

Tip: Stand far enough from the landmine so you feel tension at the bottom without losing control or twisting.

Execution (Step-by-Step)

Brace and lock in: Exhale slightly, brace the core, and keep ribs stacked over hips.
Sweep up and in: Move the hand in a smooth arc from low/outside toward your midline (chest height).
Keep the elbow fixed: Maintain the same soft bend—don’t turn it into a press or curl.
Squeeze the chest: At the top, pause 1 second and “hug” the midline without shrugging.
Control the return: Lower along the same path for 2–3 seconds until you reach a gentle stretch.

Form checkpoint: If your torso rotates hard, your shoulder rolls forward, or your traps take over, shorten the range and lighten the load. You want chest tension, not joint strain.

Pro Tips & Common Mistakes

Lead with the biceps line: Think “upper arm moves,” not “hand swings.” This keeps tension on the pec.
Shoulder stays packed: Avoid shrugging or letting the shoulder dump forward at the bottom.
Don’t turn it into a press: Too much elbow extension changes it into a landmine press variation.
Control the eccentric: A slow lower builds pec tension and keeps shoulders happier.
Small torso angle is okay: But avoid excessive twisting—brace like you’re resisting rotation.
Best pairing: Use after presses (bench/incline) or as a finisher for a strong chest pump.

FAQ

Where should I feel the landmine single-arm low fly?

Primarily in the chest (pec major), especially through the mid-range and top squeeze. You may also feel your core/obliques working to stabilize the torso. If you feel mostly shoulder pinching, reduce range, lighten the load, and keep the shoulder packed.

Is this exercise safer than dumbbell flys?

For many lifters, yes—because the landmine provides a guided arc and often avoids the deepest stretch position. You still need control and a soft elbow, but it’s commonly more shoulder-friendly than heavy dumbbell flys.

How heavy should I go?

Choose a load that lets you keep a smooth arc and stable torso for the full set. If you have to twist, shrug, or “press” the bar to finish reps, it’s too heavy. Most people grow best in the 8–12 rep range here.

Should my elbow bend change during the rep?

Keep the elbow at a consistent soft bend. If it straightens a lot, it becomes more press-like. If it bends a lot, it turns into a curl pattern. Consistency keeps the pecs loaded.

Can I do this without a landmine attachment?

You can if you have a very stable corner setup, but a proper landmine base is safer and smoother. If your setup shifts or the bar grinds, use a landmine attachment instead.

Recommended Equipment

Barbell Landmine Attachment — secure base for smooth arcs and safer setup
Landmine Handle (V-handle / Single Handle) — improves grip comfort and wrist alignment
Olympic Weight Plates (2-inch) — easy micro-loading for controlled progression
Olympic Barbell Collars (2-inch) — keeps plates secure during the arc and prevents shifting
Resistance Bands Set — great for chest activation, warm-ups, and posture-balanced pulling work

Tip: If grip or wrist position limits your fly, use a landmine handle and keep the wrist neutral. Smooth reps beat heavy, messy reps for chest isolation.