*Regular Physical Activity Influences Gut Microbiota with Positive Health Effects DOI: http://dx.doi.org/10.5772/intechopen.110725*

The use of probiotics has recently received increasing attention. Probiotics have potential health benefits, generally improving or restoring the gut microbiota, and have been shown to modulate the immune system. Recent studies have shown that probiotics reduce upper respiratory tract illness (URTI) and the onset and severity of gastrointestinal symptoms as well as gut barrier function impairment during intense exercise. By improving the immune system, they indirectly influence the performance of athletes by preventing diseases that negatively affect healthy exercise. Through SCFAs produced by probiotic bacteria, they contribute to improved energy production and reduce inflammation in the gut of physically active individuals. Selected probiotic strains have been associated with improved body composition and lean body mass, improved recovery from muscle-damaging exercise, normalization of age-related decline in testosterone levels, and reduction in cortisol levels and exerciseinduced lactate. The use of probiotics is a promising approach to improve the health, well-being, and performance of athletes.
