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Enrolling by Invitation

NCT Number: NCT06977919

NASM OPT for Pectoral Enhancement and Breast Firmness

This RCT investigates a 12-week NASM OPT program targeting pectoral muscle strength, breast aesthetics (firmness, lift, chest circumference), and low back pain in 120 non-athletic women. The intervention group performed structured resistance training, while the control group engaged in general exercise. Outcomes included pectoral strength (dynamometer), aesthetic satisfaction (Likert scale), and functional performance (push-up test).

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Key information

Conditions

Low Back Pain Back Pain Breast Sagging Muscle Weakness Muscular Diseases Musculoskeletal Diseases Nervous System Diseases Neurologic Manifestations Neuromuscular Manifestations Pain Pathologic Processes Pathological Conditions, Signs and Symptoms Signs and Symptoms

Age range

20 year–45 year

Sex eligibility

Female

Study type

Interventional

Phase

Not applicable

Primary location

Sport Sciences Department

Zahedan, Sistan and Baluchestan, 9816744818, Iran

About this study

Participants were randomized to NASM OPT (3 weekly sessions: stabilization, strength, and hypertrophy phases) or general exercise (brisk walking/aerobics). Measurements at baseline and 12 weeks included pectoral strength, chest circumference, low back pain (VAS), and perceived breast aesthetics.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Non-athletic women (no exercise in prior 6 months).
  • Interest in improving chest aesthetics.
  • No musculoskeletal injuries.

Exclusion criteria

  • Pregnancy
  • Chronic illness
  • Exercise contraindications

Treatment and study plan

NASM OPT Program

Behavioral

Three 60-minute weekly sessions for 12 weeks, progressing through stabilization (weeks 1-4), strength endurance (weeks 5-8), and hypertrophy (weeks 9-12) phases. Exercises included bench presses, chest flyes, and push-ups.

Other names: Experimental

General exercise

Behavioral

Three 60-minute weekly sessions of brisk walking and light aerobics without targeted resistance training.

Other names: Active Comparator

Primary outcomes

  1. Pectoral Strength

    Time frame: Baseline

    Kilogram (kg); handheld dynamometer

  2. Perceived Breast Firmness/Lift

    Time frame: Baseline

    5-point Likert scale

  3. Chest Circumference

    Time frame: Baseline

    Centimeter (cm)

  4. Aesthetic Satisfaction

    Time frame: Baseline

    5-point Likert scale

  5. Functional Performance

    Time frame: Baseline

    30-second push-up test

  6. Low Back Pain

    Time frame: Baseline

    VAS, 0-10 cm

Secondary outcomes

  1. Aesthetic Satisfaction

    Time frame: After12 weeks (post-intervention)

    5-point Likert scale

  2. Functional Performance

    Time frame: After12 weeks (post-intervention)

    30-second push-up test

  3. Low Back Pain

    Time frame: After12 weeks (post-intervention)

    VAS, 0-10 cm

  4. Pectoral Strength

    Time frame: After12 weeks (post-intervention)

    Kilogram (kg); handheld dynamometer

  5. Perceived Breast Firmness/Lift

    Time frame: After12 weeks (post-intervention)

    5-point Likert scale

  6. Chest Circumference

    Time frame: After12 weeks (post-intervention)

    Centimeter (cm)

Sponsors and collaborators

Lead sponsor

University of Sistan and Baluchestan

Other

Registry information

Official study title

Efficacy of a 12-Week NASM Optimum Performance Training Program on Pectoral Muscle Strength, Breast Aesthetics, and Low Back Pain in Non-Athletic Women: A Randomized Controlled Trial

Acronym: BreastFirmne

Important dates

Study start
2025
Primary completion
2025
Study completion
2026
First posted
May 18, 2025
Registry last updated
May 6, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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