Effects of Hydrolyzed Collagen and Vitamin C on Explosive Performance
Study Details
Study Description
Brief Summary
Determine whether supplementation with a combined dose of 20 g of hydrolyzed collagen and 50 mg vitamin C, along with a power training exercise program, increases rate of force development (RFD) and performance in athletes
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
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N/A |
Study Design
Arms and Interventions
| Arm | Intervention/Treatment |
|---|---|
| Experimental: Hydrolyzed collagen and Vitamin C powder mix 20 g hydrolyzed collagen + 50 mg vitamin C (ascorbic acid) pre-packed powder diluted in 250 ml (8 oz) of water |
Dietary Supplement: Collagen and Vitamin C powder mix nutritional intervention
20 g collagen + 50 mg vitamin C daily, 60 min prior to exercise
Other: Maximum power training exercise
Explosive/power-based exercise training program 3 times/week at home consisting of drop jumps, box jumps, weighted jump squats loaded in a progressive manner weekly for 3 weeks. At baseline and at the end of each of the 3 weeks, measures of explosive performance are assessed in the lab (maximal isometric squat, counter-movement jump and squat jump)
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| Placebo Comparator: Maltodextrin powder 20 g maltodextrin pre-packed powder diluted in 250 ml (8 oz) of water |
Other: Maltodextrin placebo powder
20 g maltodextrin placebo daily, 60 min prior to exercise
Other: Maximum power training exercise
Explosive/power-based exercise training program 3 times/week at home consisting of drop jumps, box jumps, weighted jump squats loaded in a progressive manner weekly for 3 weeks. At baseline and at the end of each of the 3 weeks, measures of explosive performance are assessed in the lab (maximal isometric squat, counter-movement jump and squat jump)
|
Outcome Measures
Primary Outcome Measures
- Maximal rate of force development (RFD) of isometric squat (MIS) [% change from baseline to week 1, week 2 and week 3]
Force (N) over time (msec) for the maximum slope of the first 20% of the movement
- Counter-movement jump (CMJ) rate of force development (RFD) [% change from baseline to week 1, week 2 and week 3]
CMJ jump performance N/s/kg
- Squat jump height rate of force development (RFD) [% change from baseline to week 1, week 2 and week 3]
Squat jump height performance RFD/kg
Other Outcome Measures
- Maximum peak force of maximal isometric squat (MIS) [% change from baseline to week 1, week 2 and week 3]
Peak force (N)
- Counter-movement jump (CMJ) net eccentric impulse [% change from baseline to week 1, week 2 and week 3]
Jump performance max N/s/kg (Note: Eccentric is the drop down part of the CMJ)
- Counter-movement jump (CMJ) net concentric impulse [% change from baseline to week 1, week 2 and week 3]
Jump performance max N/s/kg (Note: Concentric is the movement upwards of the CMJ)
- Leg stiffness assessment [% change from baseline to week 1, week 2 and week 3]
Tendon stiffness mean per kg (N/m/kg)
Eligibility Criteria
Criteria
Inclusion Criteria:
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Healthy male athletes between 18-30 years of age
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Currently participating in sport
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<3 musculoskeletal injuries in the past year
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No health or dietary restriction that would be affected by the supplementation protocol
Exclusion Criteria:
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History of more than 3 musculoskeletal injuries within the past 12 months
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Health, dietary restriction or diet that would be affected by the supplementation protocol
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Willing to eat similar dietary pattern the day before baseline testing and each exercise testing/intervention day
Contacts and Locations
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | UC Davis Functional Molecular Biology Laboratory and Human Performance Laboratory | Davis | California | United States | 95616 |
Sponsors and Collaborators
- PepsiCo Global R&D
Investigators
- Principal Investigator: Keith Baar, PhD, University of California, Davis
Study Documents (Full-Text)
None provided.More Information
Publications
None provided.- PEP-1704