Nulty, C, Phelan, K and Erskine, R Hydrolyzed collagen supplementation enhances patellar tendon adaptations to 12-weeks’ resistance training in middle-aged men. European Journal of Sport Science. ISSN 1746-1391 (Accepted)

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Abstract

Resistance exercise (RE) with hydrolysed collagen (HC) supplementation increases collagen synthesis in young and middle-aged populations, and further enhances tendon adaptations to chronic RE in young athletes. However, it is unknown if middle-aged tendon can benefit from chronic RE with HC supplementation. We investigated the effects of 12-weeks’ RE combined with HC supplementation on changes in patellar tendon (PT) properties in middle-aged men. In a double-blind design, 20 recreationally active men (age, 47±5 years) were randomly assigned to placebo (PLA, n=11) or collagen (COL, n=9) groups. Both cohorts completed 9 progressive lower-limb RE twice weekly for 12-weeks, and were supplemented post-RE with COL (30g HC, 50mg vitamin-C) or PLA (30.5g maltodextrin, 50mg vitamin-C). The following were assessed before and after the 12-week intervention: barbell back squat 10-repetition maximum (10-RM); vastus lateralis (VL) muscle thickness and PT cross-sectional area (CSA at 25, 50 and 75% tendon length) using ultrasonography; isometric knee extension maximum voluntary torque (MVT) and peak rate of torque development (pRTD), PT stiffness (k), and Young’s modulus (Ꜫ) using ultrasonography and isokinetic dynamometry. MVT, pRTD, and 10-RM increased (P<0.05) with no groupxtime interaction (P>0.05), whereas VL muscle thickness remained unchanged (P=0.308). Mean PT CSA increased more in COL (+6.8±5.4mm²) than PLA (+1.2±2.1mm², groupxtime P=0.027). Similarly, k and Ꜫ increased more in COL (k, +661±331 N/mm; Ꜫ, +0.21±0.13 GPa) than PLA (k, +247±305 N/mm, groupxtime P=0.009; Ꜫ, +0.09±0.13 GPa, groupxtime, P=0.018). In conclusion, 12-weeks’ RE with 30g HC supplementation augmented gains in PT CSA, stiffness, and Young’s modulus in middle-aged men.

Item Type:	Article
Uncontrolled Keywords:	0913 Mechanical Engineering; 1106 Human Movement and Sports Sciences; Sport Sciences; 4207 Sports science and exercise; 5201 Applied and developmental psychology
Subjects:	R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions:	Sport and Exercise Sciences
Publisher:	Wiley
SWORD Depositor:	A Symplectic
Date Deposited:	20 Feb 2025 14:22
Last Modified:	20 Feb 2025 14:22
URI:	https://researchonline.ljmu.ac.uk/id/eprint/25677

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