To examine the degree of development of aerobic fitness level
in futsal players, a cross-sectional design was used (14).
Professional and semi-professional futsal players were compared
to examine possible competitive-level differences in
aerobic fitness. According to Pate and Kriska (11), aerobic
fitness was considered as maximal oxygen-uptake (_VO2max),
running economy (RE), and ventilatory anaerobic
threshold (VT).