**Figure 2.** Relationships between the time constant of the fast component of the recovery period (t) and the mean swimming speed of the 200-m (200 - full line: y =1.284x + 0.002, n = 8, r = 0.77, p < 0.05), between t and peak oxygen uptake (VO- dotted line: y = 46.975x + 0.305, n = 8, r = 0.76, p < 0.05) and between t and the amplitude of the fast component of the effort period (A - grey line: y= 32.594x + 0.192, n = 8, r = 0.72, p < 0.05).