Researchers report supplementation with a multi strain Probiotic, may improve general health (71% for women and 60% for men) while reducing the incidence of certain GI (gastrointestinal) issues in long-distance runners.
70 long distance runners took part in this study. Participants between the ages of 20 and 60 were randomized in to one of two groups based on gender. Each gender group was then broken down again. 1 group was given a multi strain Probiotic which they supplemented daily for 3 months. The other group was given a placebo. During the study period, participants followed an exercise program that included endurance training and long distance running 5 to 7 days per week. Additionally participants followed a 45 minute strength training workout either once or twice weekly. Food diaries were prepared at mealtimes and included quantities, dishes consumed as well as fluid intake daily. Additional multiple choice questionnaires were completed which noted severity as well as frequency of any GI symptoms both at baseline and again at the end of the study. Blood analyses were also completed to determine any changes in serum composition.
At the end of the 3 months HDL cholesterol and triglycerides, sodium, potassium and iron increased in the women participants who were supplementing with the Probiotic while fasting serum glucose decreased in both groups of females. Iron concentrations decreased significantly in the placebo women’s group and LDL cholesterol increased in this group. Incidence of constipation decreased in the female Probiotic group.
Calcium concentrations and HDL cholesterol decreased in both of the male groups, however fasting glucose concentrations decreased but only in the Probiotic group. Increases in potassium and decreases in magnesium and iron concentrations were also seen in the Probiotic group.
No significant differences in the intake of nutrients at baseline were seen which indicated that diet did not have an impact on the GI symptoms of the participants.
Researchers concluded that an intestinal barrier plays a essential role in exercise induced GI symptoms and Probiotics had a beneficial effect based on the results of this study as well as other past studies.
Further studies need to be completed.
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