The improved swimming performance at anaerobic threshold found in the present investigation
suggests that BJS influences preferentially type 2 muscle fibres. This suggestion is in accordance with
recent evidence in rats, where BJS induces a marked increase in muscle blood flow during exercise
with the blood flow preferentially distributed to muscle groups that principally contain type 2 fibres,
which are recruited especially during moderate-high intensity exercise. Moreover, it was found that
BJS results in a preferential distribution of blood flow to type 2 fibres and improves oxidative
functions in hypoxic muscle [2,25].