Participants
muscle pain
UPPER RESPIRATORY TRACT COMPLICATIONS
Twenty-four runners participating in the running club of the Universidade Federal de Sergipe (UFS) were eligible for the study. The study was designed to be single-blinded, randomized and counter-balanced. Randomization was done using Microsoft Excel 2021 software. Blinding was achieved by telling all participants that they would receive stimulation. We included runners older than 18 years, with a weekly frequency of three to five workouts, at an average pace of 5000 m ≤ 4:30 min/kmWe excluded subjects who (a) did not finish the course due to upper respiratory tract complications, (b) reported muscle pain during warm-up and if they reported fear of electrostimulation (in the case of two runners). The runners were randomized into two groups: Anodal (n = 9; 29 ± 7 years; 63 ± 8 kg) and Sham (n = 9; 25 ± 4 years; 66 ± 12 kg). All runners were blinded. The entire flow chart of the research can be seen in (Fig. Description of sample selection and randomization