OPS Study

Study Type

General Health & Wellbeing

Study Purpose

During military missions, our men in uniform must perform at their best. Pennington Biomedical is building on its long standing relationship with the U.S. Department of Defense to explore how maintaining normal testosterone levels can preserve warfighter performance and endurance during physically demanding, low calorie missions. We are looking for men ages 18‐39 to join in this three month research study that aims to inform the military on important information about improving performance and resiliency for soldiers in the field.

About the Study

The OPS Study will assess the effects of testosterone in healthy men during severe energy deficit created by nutritional monitoring and exercise through recovery.

Study Design

Number of Visits:

  • 2 screening visits
  • 14 consecutive daily clinic visits
  • 29 day (28 night) consecutive inpatient stay
  • Up to 12 clinic visits over a 6 week period
  • 4 consecutive end of study visits

Study Procedures:

  • ECG
  • Blood draws
  • IV Procedures
  • DXA Scan
  • MRIs
  • Exercise and Strength Testing
  • Muscle Biopsy
  • Metabolic Chamber
  • Supervised Exercise Sessions
  • Questionnaires

Study Qualifications

  • Males ages 18-39
  • Must be physically active (exercise at least 2 days/week)
  • Available to live onsite at Pennington Biomedical for 28 consecutive days
  • Meet age-specific U.S. Army body composition standards (approximately 20% body fat for ages 17-20, 22% for ages 21-27, 24% for ages 28-39)
  • Willing to refrain from all medication use, alcohol, smoking/nicotine products, caffeine or dietary supplements for study duration
  • Have normal ranges for total testosterone
  • No history of cardiac, metabolic, or gastrointestinal disorders

Study Duration

Approximately 3 months after screening visits.


Earn up to $6000 for participating.

Study Contact

To see if you qualify for the OPS Study, click here to screen online, call 225-763-3000 or email clinicaltrials@pbrc.edu.

If you think you may be eligible, please click the button below to screen online.


Please do not fill out this questionnaire for anyone other than yourself unless you are their legal guardian.
If you know someone who may be interested please direct them to the site or have them call us directly at 225-763-3000.


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