Figure 1.

Training program undertaken throughout the study period. Electronic exercise diary (www.sportlyzer.com) was kept for water and ergometer training hours throughout the study period. On the left y-axis—training load in minutes per week, min/week (Rowing on the Water and Indoors); on the right y-axis—distance in meters per week, m/week (Competition/m); on the x-axis—duration of the study period in weeks. Samples for microbiome analysis were taken at weeks 1, 27, and 31. On water, training on the water; Indoors, training on rowing ergometer; Competition, competition calendar of the rower.