Effects of different recovery times during high-intensity interval training using body weight on psychophysiological variables

The present study aimed to analyze different recovery times on psychophysiological responses during HIIT sessions using body weight. All volunteers performed three sessions of HIIT using body weight with different recovery times of 60 s, 30 s, and 15 s. The recovery times were randomly assigned with an interval of 48 hours between sessions. The following variables were assessed: Heart rate (HR), perceived effort (SPE), perception of recovery (SPR), Total number of movements in the session (TAM), and lactate concentrations. There were no differences in absolute (p = 0.057) and relative (p = 0.066) HR between the 60 s and 30 s sessions, however the values of absolute (p = 0.001) and relative (p = 0.002) in the 15 s session were greater than 60 s. Considering the number of movements, the session using the 15 s recovery period (p = 0.001) presented lower values than sessions using 60 s and 30 s which did not differ from each other. The SPE values of the 60 s session were lower (p = 0.028; p < 0.001) than the 30 s and 15 s sessions, respectively, which differed in order (p < 0.001). The training load of the 60 s and 30 s sessions did not differ (p = 0.649) from each other, but both were lower (p = 0.001) than the 15 s session. The findings of the present study show that the variables SPE, SPR, and TAM for the 15 s recovery period had a significantly different response than the 60 s and 30s recovery, however, the lactate concen-tration between the different conditions (60 s, 30 s, and 15 s) after the training session did not produce a significantly different result.