NCT06977919

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

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

• Status: Enrolling By Invitation
• Phase: N/A
• Study type: Interventional
• Enrollment: 120 (estimated)
• Sponsor: University of Sistan and Baluchestan · Academic / Other
• Sex: Female
• Age: 20 Years – 45 Years
• Healthy volunteers: Accepted

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.

Conditions

• Low Back Pain
• Muscle Weakness
• Breast Sagging

Interventions

Type	Name	Description
BEHAVIORAL	NASM OPT Program	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.
BEHAVIORAL	General Exercise	Three 60-minute weekly sessions of brisk walking and light aerobics without targeted resistance training.

Timeline

• Start date: 2025-05-01
• Primary completion: 2025-08-15
• Completion: 2025-09-30
• First posted: 2025-05-18
• Last updated: 2025-05-18

Locations

1 site across 1 country: Iran