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The purpose of this study is to evaluate how probiotic supplementation (PS) influences post-exercise recovery in healthy, physically active young adults. Researchers aim to determine if the Lactobacillus casei probiotic strain reduces symptoms of delayed onset muscle soreness (DOMS) based on perceived muscle soreness, pressure pain threshold, and power output following exercise induced muscle damage (EIMD).
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Probiotic Group | Active Comparator |
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| Placebo Group | Placebo Comparator |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Lactobacillus casei | Dietary Supplement | Probiohealth is the manufacturer of this strain and they use a stringent quality control program that utilizes a multi point product variability check system. |
| Measure | Description | Time Frame |
|---|---|---|
| Change in perceived muscle soreness | Visual Analog Scale for perceived muscle soreness Each number on the scale will be designated with a descriptive word that corresponds to the soreness level they are experiencing. The scale will be laid out in order of increasing muscle soreness with "1" representing no pain. | From baseline to post 5-week intervention |
| Change in pressure pain threshold (PPT) | Calf pressure pain threshold (PPT) will be assessed by placing marks on the medial condyle of the femur and the posterior of the medial malleolus. The researcher will place the algometer on the muscle belly exactly halfway between the two marks. Volunteers will be instructed to specify when the first onset of pain occurs as the researcher gradually applies pressure. Quadricep measurements will involve the participant lying in the supine position where marks will be made on the anterior inferior iliac spine and the top of the patella so the researchers can once again find a point exactly halfway between these two locations to apply the algometer. Participants will be instructed to verbally indicate to the researcher when the onset of pain occurs as pressure is applied. | From baseline to post 5-week intervention |
| Change in countermovement jump assessment (CMJ) performance recovery | The researchers will demonstrate and instruct volunteers to "Stand upright with their hands above their head. When you are ready, bend your knees and stick your hips back while keeping your hands to your hips. Jump as high as possible and land softly." Participants will perform three CMJs separated by 60 seconds. Jump height will be recorded in cm and the highest value will be recorded. | From baseline to post 5-week intervention |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Jakob Fischer | Contact | 507-236-8051 | fisc0887@d.umn.edu |
| Name | Affiliation | Role |
|---|---|---|
| Mary Stenson | University of Minnesota | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University of Minnesota | Recruiting | Minneapolis | Minnesota | 55455 | United States |
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| Placebo Capsule(s) | Other | The brand name of placebo capsules that will be used in this study is Magic Bullet Placebo Capsules. This placebo is manufactured by Progressive Placebo as stated on the product label. |
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