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B-16 Free Communication/Slide - Nutritional Ergogenic Aids Wednesday, May 27, 2020, 1: 00 PM - 3: 00 PM Room: CC-2016

Effects Of Vitamin C Enriched Hydrolyzed Collagen On Explosive Performance

652 May 27 1:45 PM - 2:00 PM

Lis, Dana Marie; Smith, Tayler; Baar, Keith FACSM; Lipuma, Timothy; Weijer, Vera

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Medicine & Science in Sports & Exercise: July 2020 - Volume 52 - Issue 7S - p 171
doi: 10.1249/01.mss.0000675320.08129.c2
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The stiffness of a tendon is determined by the amount and cross-linking of collagen within the tissue. Acute exercise and possibly vitamin C-enriched collagen supplementation have been shown to increase collagen synthesis as well as the expression of the primary enzyme involved in collagen cross-linking (lysyl oxidase). The result may be a denser and stiffer tissue. Stiffness is directly related to force transfer. Whether this nutritional supplementation can further augment response to training, in particular rate of force development (RFD), and translate to improved explosive performance compared to training alone is unknown.

PURPOSE: To determine if nutritional supplementation with vitamin C-enriched collagen improves RFD compared to placebo (PLA) with an explosive power-based training regime.

METHODS: Healthy male collegiate football players (18-25 years) were enrolled in a 3-week double-blinded, parallel design study. Athletes were randomly assigned to the intervention group (COLL; 15g hydrolyzed collagen with 50mg vitamin C) or placebo group (PLA; 15g rice four). Supplements were ingested 60min prior to training 5 days per week and with breakfast on rest days. Athletes completed the same training program and progression. RFD was measured from the best of three maximal isometric squats, countermovement jumps and squat jumps (Kistler, Novi, MI) performed at the same time on each testing day (baseline and after 1,2 and 3 weeks of training). Two-way ANOVA (nutrition intervention and time) was used to compare RFD between groups.

RESULTS: At time of analysis there were no significant difference for maximal RFD in the maximal isometric squat between the interventions. RFD data from CMJ and SJ are yet to be determined.

CONCLUSION: Supplementation with vitamin C-enriched collagen prior to training throughout a 3-week explosive power-based training program does not improve maximal RFD compared to exercise alone. More comprehensive analysis of all RFD parameters is required to fully interpret results from this study and will be completed prior to abstract presentation.

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