NASM OPT for Pectoral Enhancement and Breast Firmness in Non-Athletic Women: An RCT (BreastFirmne)

University of Sistan and Baluchestan

Status: Invitation-only

Conditions: Muscle Weakness; Breast Sagging; Low Back Pain

Treatments: Behavioral: General Exercise; Behavioral: NASM OPT Program

Study type: Interventional

Funder types: Other

Identifiers

NCT06977919

9378-30-3-2025

Details and patient eligibility

About

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).

Full description

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.

Enrollment: 120 estimated patients

Sex: Female

Ages: 20 to 45 years old

Volunteers: Accepts Healthy Volunteers

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

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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120 participants in 2 patient groups

NASM OPT Group

Experimental group

Description:

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.

Treatment:

Behavioral: NASM OPT Program

General Exercise Group

Active Comparator group

Description:

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

Treatment:

Behavioral: General Exercise