Effects of High- and Moderate-intensity Exercise on T Cell Function in Healthy Young Men
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Sponsor
- University of Kansas
- Enrollment
- 16
- Locations
- 1
- Primary Endpoint
- T cell proliferation
Study Overview
Brief Summary
The objective of this project is to quantify the immunoendocrine response to acute stress events combining both physical and psychological challenges. This work will serve as a pilot project examining differential stress induction in response to exercise. Participants will have an instructor with prior military training lead a two-hour training session for 10 recreationally fit male volunteers. You will be randomly assigned to a high-intensity training group to participate in the "military style" training and a low-intensity training group who will participate in a low-intensity cardiovascular training protocol. Blood samples will be collected from you prior to and following the exercise session and these samples will be analyzed for endocrine measures as well as markers of immune function to include chemokines and cytokines.
Study Design
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Parallel
- Primary Purpose
- Basic Science
- Masking
- None
Eligibility Criteria
- Ages
- 18 Years to 35 Years (Adult)
- Sex
- Male
- Accepts Healthy Volunteers
- Yes
Inclusion Criteria
- •All subjects will be screened using a health-history questionnaire for contradictions to exercise by American College of Sports Medicine (ACSM) guidelines
- •Inclusion Criteria:
- •Recreationally active
- •Between the ages of 18-40,
- •Non-obese (BMI <28 kg/m2)
- •Non-smoking
- •Free of metabolic or cardiovascular diseases.
Exclusion Criteria
- •Unhealed Fractures
- •Thrombophlebitis (blood clots)
- •Recent Surgery (within the last three months)
- •Recent Uncontrolled Bruising
- •Osteomyelitis (acute or chronic bone infection)
- •Myositis Ossificans (hardened scarring in muscle tissue of the thigh).
Arms & Interventions
Moderate intensity exercise
Subjects will participate in a 100 min bout of exercise led by an exercise physiologist doing the same exercises as the high-intensity group, but at a lower effort level. Exercise consists of of a mix of running activities (≤ 400 m); body weight exercises, such as burpees and lunges; and exercises, such as crunches and squats utilizing 20.4 kg weight plates, but performed at a pace allowing for in-session recovery. Scheduled 5 min rests will be included at 30, 60, and 85 min and MI subjects will be similarly encouraged to consume water and/or the carbohydrate/electrolyte drink. The researchers will obtain a blood sample from you prior to and immediately following the exercise, as well as one, four and six hours post-exercise.
Intervention: Exercise (Other)
High intensity exercise
Subjects in this group will participate in an exercise session that is representative of a training event experienced by cadets preparing for military competitions. All exercises will consist of a mix of running activities (≤ 400 m); body weight exercises, such as burpees and lunges; and exercises, such as crunches and squats utilizing 20.4 kg weight plates; with rapidly occurring exercise transitions to prevent recovery. The exercise bout will last a total of 100 min. Scheduled 5 min rests will be inserted at 30, 60, and 85 min. During the scheduled rest periods, subjects will be encouraged to consume water and/or the carbohydrate/electrolyte drink. The researchers will obtain a blood sample from you prior to and immediately following the exercise, as well as one, four and six hours post-exercise.
Intervention: Exercise (Other)
Outcomes
Primary Outcomes
T cell proliferation
Time Frame: 6.5 hours
Blood samples were collected using standard venipuncture technique. Blood samples were obtained at baseline, immediately post-exercise (0h), 1 hour post (1h), 4 hours (4h), and 6 hours (6h) post-exercise in heparin vacutainer tubes. Peripheral blood mononuclear cells (PBMC) were isolated using Ficoll-Paque PLUS density gradient centrifugation. Total T cells were purified from washed PBMC by E-rosetting. T cell proliferation was analyzed in response to co-stimulation through CD3+CD28 using plate-bound antibodies, or phytohaemagglutinin (PHA) treatment, or no simulation. Cells were incubated for 6 days at 37˚C in a humidified incubator with 5% CO2 and then analyzed by flow cytometry. Cells were analyzed by flow cytometry using anti-CD3-APC, and anti-CD152-PE antibodies immediately after CD3+ T cell isolation (0 h) and following 6 d in culture using an Accuri C6 flow cytometer.
Secondary Outcomes
- Catecholamines (hormones)(6.5 hours)
- Complete Blood Count(6.5 hours)
- Cortisol(6.5 hours)
Investigators
Philip Gallagher
Professor
University of Kansas