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HydrolyzedCollagenSupplementationonLowerBodyStiffnessin Recreational Triathletes

Dewolf, Arthur;et.al.
(2021) Asian Journal of Sports Medicine — Vol. 12, n° 3, p. e107893 (2021)

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Background: Myotendinous stiffness is related to the collagen content of the muscle and tendon, and can be estimated during running by changes in vertical stiffness (kvert) and the resulting modifications of the spatiotemporal parameters (on-off ground asymmetry and landing-takeoff asymmetry). Supplementation with amino acids found in collagen, such as proline, glycine, and hydroxylproline,combinedwithascorbicacid,improvecollagensynthesisandpotentiallyresultinimprovedmechanicalstrength andstiffness. Objectives: Todetermineifhydrolyzedcollagen(HC)supplementationincreaseskvert andimprovesthespatiotemporalparameters duringrunninginrecreationaltriathletes. Methods:Nineactivemales(weight;68.4±5.7kg,height;171.8±5.4cm,age;32.5±4.1years;Vo2max;53.15±2.19mL/kg/min)were randomlydistributedintoacollagengroup(CollG,n=5)andacontrolgroup(CG,n=4). Participantsweresupplementedfor4weeks with 15g HC(CollG) or 15g placebo (CG; maltodextrin), 3 times per week. One hour after supplementation, the participants of both groups wereaskedtoperformfourrepetitionsof shortsprints to further stimulate collagen synthesis. The ground reaction forces wererecordedduringrunningat4.44ms-1,5.55m.s-1,and6.66m.s-1 forassessmentof kvert andthespatiotemporalstepparameters. Results: Bothgroupsincreasedkvert withspeed(4.44-6.66ms-1)from24.8±2.7to53.7±16.5N/mandfrom25.1to49.8N/minthe CollG andCG,respectively (P < 0.0001); however, there were no differences between groups before and after the supplementation period. As aconsequence,thespatiotemporalparametersof runningwerealsosimilarbetweengroups. Conclusions:FourweeksofHCsupplementationdoesnotimprovethebouncingmechanismofrunninginrecreationaltriathletes.
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Dewolf, A., & et al. (2021). HydrolyzedCollagenSupplementationonLowerBodyStiffnessin Recreational Triathletes. Asian Journal of Sports Medicine, 12(3), e107893. https://doi.org/10.5812/asjsm.107893. (Original work published 2021)