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Influence of a Montmorency Cherry Juice Blend on Indices of Exercise

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Influence of a Montmorency Cherry Juice Blend on Indices of Exercise Donald and Barbara Zucker School of Medicine Journal Articles Academic Works 2015 Influence of a montmorency cherry juice blend on indices of exercise-induced stress and upper respiratory tract symptoms following marathon running--a pilot investigation L. Dimitriou J. A. Hill A. Jehnali J. Dunbar J. Brouner See next page for additional authors Follow this and additional works at: https://academicworks.medicine.hofstra.edu/articles Recommended Citation Dimitriou L, Hill J, Jehnali A, Dunbar J, Brouner J, McHugh MP, Howatson G. Influence of a montmorency cherry juice blend on indices of exercise-induced stress and upper respiratory tract symptoms following marathon running--a pilot investigation. 2015 Jan 01; 12():Article 1378 [ p.]. Available from: https://academicworks.medicine.hofstra.edu/articles/1378. Free full text article. This Article is brought to you for free and open access by Donald and Barbara Zucker School of Medicine Academic Works. It has been accepted for inclusion in Journal Articles by an authorized administrator of Donald and Barbara Zucker School of Medicine Academic Works. Authors L. Dimitriou, J. A. Hill, A. Jehnali, J. Dunbar, J. Brouner, M. P. McHugh, and G. Howatson This article is available at Donald and Barbara Zucker School of Medicine Academic Works: https://academicworks.medicine.hofstra.edu/articles/1378 Dimitriou et al. Journal of the International Society of Sports Nutrition (2015) 12:22 DOI 10.1186/s12970-015-0085-8 RESEARCH ARTICLE Open Access Influence of a montmorency cherry juice blend on indices of exercise-induced stress and upper respiratory tract symptoms following marathon running—a pilot investigation Lygeri Dimitriou1*, Jessica A Hill2, Ahmed Jehnali3, Joe Dunbar3, James Brouner4, Malachy P. McHugh5 and Glyn Howatson6,7 Abstract Background: Prolonged exercise, such as marathon running, has been associated with an increase in respiratory mucosal inflammation. The aim of this pilot study was to examine the effects of Montmorency cherry juice on markers of stress, immunity and inflammation following a Marathon. Methods: Twenty recreational Marathon runners consumed either cherry juice (CJ) or placebo (PL) before and after a Marathon race. Markers of mucosal immunity secretory immunoglobulin A (sIgA), immunoglobulin G (IgG), salivary cortisol, inflammation (CRP) and self-reported incidence and severity of upper respiratory tract symptoms (URTS) were measured before and following the race. Results: All variables except secretory IgA and IgG concentrations in saliva showed a significant time effect (P <0.01). Serum CRP showed a significant interaction and treatment effect (P < 0.01). The CRP increase at 24 and 48 h post-Marathon was lower (P < 0.01) in the CJ group compared to PL group. Mucosal immunity and salivary cortisol showed no interaction effect or treatment effect. The incidence and severity of URTS was significantly greater than baseline at 24hand48hfollowingtheraceinthePLgroupandwasalsogreaterthantheCJgroup(P < 0.05). No URTS were reported in the CJ group whereas 50 % of runners in the PL group reported URTS at 24 h and 48 h post-Marathon. Conclusions: This is the first study that provides encouraging evidence of the potential role of Montmorency cherries in reducing the development of URTS post-Marathon possibly caused by exercise-induced hyperventilation trauma, and/or other infectious and non-infectious factors. Keywords: Recovery, URTS, Exercise-induced inflammation, Muscle damage Background examined the aetiology of URTS following Marathon run- Prolonged and exhaustive exercise is often associated with ning reported that half or more than two-thirds of symp- symptoms and signs of respiratory mucosal inflammation tomatic cases were attributable to inflammation [6] and/or [1, 2]. The upper respiratory tract symptoms (URTS) usually allergy [7]. This non-infectious hypothesis can be further seen following prolonged and exhaustive exercise [3, 4] have supported due to the fact, episodes of URTS in athletes are conventionally been attributed to a transient depression not characterised by usual seasonal patterns and show an of the innate and adaptive immunity that eventually pro- unusual short-term duration [8]. Exercise-induced airway gresses into infection [5]. However, recent studies that inflammation, common in endurance athletes [1, 9-11] can be mediated by a number of factors including the synergistic effect of hyperventilation trauma [2, 12], oxidative stress * Correspondence: [email protected] [13] and inhaled allergens and pollutants [7, 10, 14]. 1London Sport Institute, Middlesex University, Allianz Park, Greenland Way, Exercise has shown to up-regulate the chemotactic cyto- NW4 1RLE, London, UK kine expression in the airways [15] causing inflammation, Full list of author information is available at the end of the article © 2015 Dimitiou et al.; licensee BioMed Central. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. Dimitriou et al. Journal of the International Society of Sports Nutrition (2015) 12:22 Page 2 of 7 allergic reactions in bronchi, increasing the likelihood the same cohort as those from previously published of bronchoconstriction and possibly imitating symptoms work [30] that examined the impact of Montmorency that resemble respiratory infections [8]. For example, cherry juice blend on recovery following Marathon run- interleukin-8 (IL-8) has been implicated in pulmonary ning. Eighteen completed the 2008 London Marathon inflammation and hyper-responsiveness under acute oxi- (temp: 7 °C, humidity: 56 %, wind speed: 4 km/h) and dative stress [16, 17]. Previous studies have shown a unani- remaining two completed the same distance in West mous increase in IL-8 following prolonged and exhaustive London two weeks later in similar conditions (temperature: exercise [18, 19]. IL-8 is known to be a potent mediator of 7 °C,humidity:50%,windspeed:12km/h).Following chemotaxis, and activates neutrophils resulting in the gen- completion of written informed consent, all participants eration of reactive oxygen species (ROS) [20], which might were asked to refrain from taking nutritional supple- lead to pulmonary inflammation and trauma [13]. Neutro- ments, pharmacological interventions and strenuous phils increase markedly post-Marathon [19, 21], and pul- exercise (other than completing training runs prior to monary inflammation is characterised by the migration and the Marathon) for the duration of the study. All proce- activation of neutrophils into the airways [22]. Increased dures were granted ethical approval from the Institu- neutrophils in induced sputum post-Marathon have been tional Research Ethics Committee, in accordance with reported in healthy athletes [1]. the Helsinki Declaration. Tart Montmorency cherries are purported to be high in numerous phytochemicals, such as anthocyanins, and Experimental overview other polyphenolic compounds such as quercetin that Participants were randomly assigned to either a placebo possess anti-inflammatory and anti-oxidative properties (PL) or cherry juice blend (CJ) group based upon pre- [23, 24]. Growing interest in these functional foods has dicted Marathon finish time. Possible sex differences in gained momentum in recent years and there is a mount- response to Marathon running were controlled by balan- ing body of evidence to suggest Montmorency cherries cing the number of male and female participants in each can facilitate exercise recovery [24-28]; this is likely group (3 CJ, 4 PL). Markers of stress, inflammation, mu- attributable to the increased bioavailability of these cosal immunity and upper respiratory tract symptoms anti-inflammatory and anti-oxidative phytochemicals fol- were measured on four occasions; the day before the lowing ingestion [29, 30]. In a recent addition to the lit- Marathon, immediately after, and at 24 h and 48 h after erature, Bell et al. [24] showed that in trained cyclists, the Marathon. Following an initial visit to the laboratory, consumption of a Montmorency cherry concentrate (in six days prior to the Marathon, participants were allo- comparison to a calorific matched placebo) resulted in a cated to treatment groups and were instructed to take reduction in lipid hyperoxides and a concomitant reduc- the supplement for five days prior to, the day of the tion in inflammation (IL-6 and C-reactive protein) fol- Marathon and for the 48 h following the Marathon (total lowing repeated days strenuous cycling. Additionally, eight days). polyphenols such as quercetin (also found in Montmo- rency cherries), modulate the expression of transcription Treatment groups nuclear factor-kappa B (NF-kappaB), [31, 32], which may The CJ group consumed 2 servings x 236 ml (taken morn- in turn decreased the exercised-induced IL-6 production ing and afternoon) of a fresh pressed blend (Cherrypharm by an attenuation of cytokine transcription for IL-6. Previ- Inc., Geneva, New York, USA) of tart Montmorency CJ ous studies have also shown these polyphenols to reduce combined with proprietary apple juice (which the manu- other inflammatory biomarkers such as tumor necrosis facturers add to increase palatability).
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