Juice made from Montmorency cherries may reduce the development of upper respiratory tract symptoms after running a marathon
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 24 h and 48 h following the race in the PL group and
was also greater than the CJ group (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.
Lygeri Dimitriou, Jessica A Hill, Influence
of a montmorency cherry juice blend on indices of exercise-induced stress and
upper respiratory tract symptoms following marathon running—a pilot
investigation, Journal of the International Society of Sports Nutrition 2015, 12:22 doi:10.1186/s12970-015-0085-8
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