Browsing by Author "Barclay, Rachel H."

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    Effect of collagen, compared to milk protein, on acute recovery from exercise induced muscle damage following downhill running : a thesis presented in partial fulfilment of the requirements for Master of Health Science in Sport and Exercise, Massey University, Manawatū, New Zealand
    (Massey University, 2024) Barclay, Rachel H.
    There is evidence to suggest that collagen can increase musculoskeletal connective tissue repair following exercise induced muscle damage (EIMD), however its effect(s) in contrast to a typical post-exercise supplement remains unclear. Therefore, this study compared the effect of collagen hydrolysate (CH) to milk protein concentrate (PRO) on acute recovery from EIMD, and subsequent delayed onset muscle soreness (DOMS), induced by downhill running. In a double-blind, randomised, independent group design study, 33 recreationally active males (18-40 years) consumed either CH or PRO, containing 25 g of protein, or an isoenergetic carbohydrate placebo (PLA) immediately post-exercise and once daily for three days. Indices of EIMD were measured before and 30 minutes, 24, 48, and 72 hours after 30 minutes of downhill running on a -15% slope at 80% of predetermined VO2max speed. The protocol induced significant EIMD, with time effects (all P = < 0.001) for DOMS (visual analogue scale), countermovement jump, isometric midthigh pull, maximal voluntary isometric contraction, running economy, and biomarkers of muscle damage and inflammation. No group or interaction effects (P = < 0.05) were observed for any outcome measures, at any time point of recovery. The findings suggest the consumption of CH or PRO post-exercise does not improve indirect indices of EIMD during the acute recovery period following downhill running in recreationally active males.