An interventional study of NASM OPT Program and General Exercise in Low Back Pain, Muscle Weakness and Breast Sagging, sponsored by University of Sistan and Baluchestan. Enrolling by invitation at 1 site in Iran. Open to female participants aged 20 Years to 45 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-05-06.
Sponsored by University of Sistan and Baluchestan · Not applicable, Interventional, and Treatment
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).
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.
2,922 studies on the registry are indexed under Low Back Pain; 580 are open to participants now.
This study's planned enrollment of 120 is above the median of 60 across 2,364 interventional studies indexed under Low Back Pain.
Browse Low Back Pain studies →University of Sistan and Baluchestan is the lead sponsor of 7 studies on the registry; 3 are open to participants now.
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Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.
Contraindication
A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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: NASM OPT Program
Three 60-minute weekly sessions of brisk walking and light aerobics without targeted resistance training.
Behavioral: General Exercise
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.
Also known as: Experimental
Three 60-minute weekly sessions of brisk walking and light aerobics without targeted resistance training.
Also known as: Active Comparator
Pectoral Strength
Kilogram (kg); handheld dynamometer
Time frame: Baseline
Perceived Breast Firmness/Lift
5-point Likert scale
Time frame: Baseline
Chest Circumference
Centimeter (cm)
Time frame: Baseline
Aesthetic Satisfaction
5-point Likert scale
Time frame: Baseline
Functional Performance
30-second push-up test
Time frame: Baseline
Low Back Pain
VAS, 0-10 cm
Time frame: Baseline
Aesthetic Satisfaction
5-point Likert scale
Time frame: After12 weeks (post-intervention)
Functional Performance
30-second push-up test
Time frame: After12 weeks (post-intervention)
Low Back Pain
VAS, 0-10 cm
Time frame: After12 weeks (post-intervention)
Pectoral Strength
Kilogram (kg); handheld dynamometer
Time frame: After12 weeks (post-intervention)
Perceived Breast Firmness/Lift
5-point Likert scale
Time frame: After12 weeks (post-intervention)
Chest Circumference
Centimeter (cm)
Time frame: After12 weeks (post-intervention)
Plan to share: No — Privacy concerns regarding sensitive participant data.
No publications or documents are linked to this record.
Ran from May 2025 to primary completion in Sep 2025, 4 months.
Of 1,231 non-industry interventional studies with no phase under Low Back Pain, half reached primary completion within 11 months of starting (the median), counting those still running; a quarter within 5 and three quarters within 26. This study's 4 months is below that.
Counting every sponsor, half of 1,286 studies reached it within 11 months; a quarter within 5 and three quarters within 27.
How these figures are worked out, and which studies are left out of them.
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University of Sistan and Baluchestan