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

Not Applicable

• Conditions: Low Back Pain; Muscle Weakness; Breast Sagging

• Registration Number: NCT06977919
• Lead Sponsor: University of Sistan and Baluchestan

Brief Summary

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).

Detailed 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.

Study Timeline

• Status Verified: 2025-05
• Study Start: 2025-05-01
• Study First Submitted: 2025-05-10
• Study First Submitted QC: 2025-05-16
• Last Update Submitted: 2025-05-16
• Study First Posted: 2025-05-18
• Last Update Posted: 2025-05-18
• Primary Completion: 2025-08-15
• Study Completion: 2025-09-30

Recruitment & Eligibility

• Status: ENROLLING_BY_INVITATION
• Sex: Female
• Target Recruitment: 120

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

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Primary Outcome Measures

Name	Time	Method
Pectoral Strength	Baseline, 12 weeks	Kilogram (kg); handheld dynamometer
Perceived Breast Firmness/Lift	Baseline, 12 weeks	5-point Likert scale
Chest Circumference	Baseline, 12 weeks	Centimeter (cm)

Secondary Outcome Measures

Name	Time	Method
Aesthetic Satisfaction	Baseline, 12 weeks (post-intervention)	5-point Likert scale
Functional Performance	Baseline, 12 weeks (post-intervention)	30-second push-up test
Low Back Pain	Baseline, 12 weeks (post-intervention)	VAS, 0-10 cm

Trial Locations

Locations (1)

Sport Sciences Department; 🇮🇷 Zahedan, Sistan And Baluchestan, Iran, Islamic Republic of