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).
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.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
120
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.
Three 60-minute weekly sessions of brisk walking and light aerobics without targeted resistance training.
Ferdows Shafa Center
Ferdows, South Khorasan Province, Iran
Gluteal Strength
kg; handheld dynamometer
Time frame: Baseline, 12 weeks (post-intervention)
Perceived Hip Shape/Lift
5-point Likert scale
Time frame: Baseline, 12 weeks (post-intervention)
Hip Circumference
cm
Time frame: Baseline, 12 weeks (post-intervention)
Aesthetic Satisfaction
5-point Likert scale
Time frame: Baseline, 12 weeks
Functional Performance
30-second squat test
Time frame: Baseline, 12 weeks
Low Back Pain
VAS, 0-10 cm
Time frame: Baseline, 12 weeks
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