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NASM OPT for Gluteal Enhancement in Non-Athletic Women: An RCT

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

Status
Enrolling by invitation
Phases
Unknown
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06977958
Acronym
GlutealEnhan
Enrollment
120
Registered
2025-05-18
Start date
2025-02-01
Completion date
2026-05-30
Last updated
2026-05-06

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Body Image Disturbance, Low Back Pain, Muscle Weakness

Keywords

NASM OPT, Gluteal Muscles, Hip Aesthetics, Non-Athletic Women, Resistance Training

Brief summary

This RCT evaluates a 12-week NASM OPT program targeting gluteal muscle strength, hip aesthetics (shape, lift, 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 gluteal strength (dynamometer), aesthetic satisfaction (Likert scale), and functional performance (squat 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 gluteal strength, hip circumference, low back pain (VAS), and perceived aesthetics.

Interventions

BEHAVIORALNASM OPT Group

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 hip thrusts, squats, and glute bridges.

BEHAVIORALGeneral Exercise Group

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

Sponsors

University of Sistan and Baluchestan
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Outcomes Assessor)

Masking description

Single-blind (outcome assessors only; participants/instructors unblinded due to intervention nature).

Eligibility

Sex/Gender
FEMALE
Age
20 Years to 45 Years
Healthy volunteers
Yes

Inclusion criteria

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

Exclusion criteria

* Pregnancy * Chronic illness * Exercise contraindications

Design outcomes

Primary

MeasureTime frameDescription
Gluteal StrengthBaselinekg; handheld dynamometer
Perceived Hip Shape/LiftBaseline5-point Likert scale
Hip CircumferenceBaselinecm
Aesthetic SatisfactionBaseline5-point Likert scale
Functional PerformanceBaseline30-second squat test
Low Back PainBaselineVAS, 0-10 cm

Secondary

MeasureTime frameDescription
Aesthetic SatisfactionAfter 12 weeks5-point Likert scale
Functional PerformanceAfter 12 weeks30-second squat test
Low Back PainAfter 12 weeksVAS, 0-10 cm
Gluteal StrengthAfter12 weeks (post-intervention)kg; handheld dynamometer
Perceived Hip Shape/LiftAfter12 weeks (post-intervention)5-point Likert scale
Hip CircumferenceAfter12 weeks (post-intervention)cm

Countries

Iran

Contacts

STUDY_DIRECTORMohammadreza Rezaeipour, MD, PhD

Assoc.Prof.Dr. of University of Sistan and Baluchestan, Zahedan, Iran

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: May 7, 2026