Clifford, Tom, Bell, Oliver, West, Dan, Howatson, Glyn and Stevenson, Emma (2016) The effects of beetroot juice supplementation on indices of muscle damage following eccentric exercise. European Journal of Applied Physiology, 116 (2). pp. 353-362. ISSN 1439-6327
Full text not available from this repository.Abstract
Purpose - Foods rich in antioxidant and anti-inflammatory phytochemicals might attenuate skeletal muscle damage; thus, the present study investigated whether consuming an antioxidant rich beetroot juice would attenuate the muscle-damaging effects of eccentric exercise.
Methods - Using a double blind, independent groups design, 30 recreationally active males were allocated to consume a high dose of beetroot juice (H-BT; 250 ml), a lower dose of beetroot juice (L-BT; 125 ml), or an isocaloric placebo (PLA; 250 ml) immediately (×3 servings), 24 (×2 servings) and 48 h (×2 servings) following completion of 100-drop jumps. Maximal isometric voluntary contractions (MIVC), countermovement jumps (CMJ), pressure pain threshold (PPT), creatine kinase (CK), interleukin-6 (IL-6), interleukin-8 (IL-8) and tumour necrosis factor-α (TNF-α) were measured pre, post, 2 (blood indices only), 24, 48 and 72 h following the drop jumps.
Results - CMJ performance recovered quicker (relative to baseline) in H-BT vs. PLA at 48 (91.7 ± 12.2 vs. 74.4 ± 17.3 %; P = 0.009, ES = 1.00) and 72 h postexercise (93.4 ± 7.7 vs. 86 ± 5.9 %; P = 0.046, ES = 1.25). PPT was greater in both the H-BT and L-BT vs. PLA at 24, 48 and 72 h postexercise (P < 0.001); PPT had returned to baseline in H-BT and L-BT at 72 h postexercise, but was still reduced in PLA (80.1 ± 28.9 % of baseline values). MIVC, CK, IL-6, TNF-α and IL-8 were unaffected by beetroot juice (P > 0.05).
Conclusions - Acute beetroot juice supplementation attenuated muscle soreness and decrements in CMJ performance induced by eccentric exercise; further research on the anti-inflammatory effects of beetroot juice are required to elucidate the precise mechanisms.
Item Type: | Article |
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Uncontrolled Keywords: | Betalains; Exercise recovery; Inflammation; Muscle damage |
Subjects: | C600 Sports Science |
Department: | Faculties > Health and Life Sciences > Sport, Exercise and Rehabilitation |
Depositing User: | Paul Burns |
Date Deposited: | 10 Nov 2015 15:27 |
Last Modified: | 12 Oct 2019 16:27 |
URI: | http://nrl.northumbria.ac.uk/id/eprint/24389 |
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