Pec deck flyes

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How to do it

Pec deck fly. Maximum contraction on the squeeze. Controlled range. Ideal finisher.

Muscles worked

Mainly pecho. Train it inside a balanced routine to progress safely.

Recommended sets and reps

As an isolation exercise, it works best in 3–4 sets of 10–15 reps with 0–2 RIR. Use it at the end of the session to add volume without systemic fatigue.

Common mistakes to avoid

• Bouncing the bar or dumbbells off the chest instead of controlling the final part of the range.
• Using too much weight at the cost of technique and full range of motion.
• Doing reps too fast, without controlling the eccentric (lowering) phase.

Alternative exercises

• Dumbbell flyes
• Cable crossover
• Dumbbell pullover
• High-to-low cable crossover
• Low-to-high cable crossover

Add it to your routine

FitnessAI can generate a personalized routine that includes Pec deck flyes based on your level, goal and available days.

Frequently asked questions

What muscles does Pec deck flyes work?

Pec deck flyes mainly works the pecho muscle group, plus synergist and stabilizer muscles depending on the variation.

How many sets of Pec deck flyes should I do?

Between 3 and 5 sets per session, adjusting the total weekly volume for pecho to your level (about 10–20 sets per muscle per week).

Is Pec deck flyes good for building muscle?

Yes. Combined with progressive overload, good technique and enough rest, it's an effective tool to grow pecho.

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