The group will receive guidance to perform the exercises in a relaxed and smooth way

The group will receive guidance on the specific activation of the center of strength (the powerhouse)

Participants will be randomised into two groups that will be treated with Pilates exercises for 12 weeks (twice a week for 60 minutes). The control group will receive guidance on the specific activation of the center of strength (the powerhouse), while the experimental group will receive guidance to perform the exercises in a relaxed and smooth way.

Pain intensity will be obtained through self-report by the Brazilian version of the 11-point Numerical Pain Scale (NPS) (Costa et al., 2008; Vigotsky et al., 2021), which varies between 0 and 10 points, where 0 is "no pain" and 10 is "the worst pain imaginable" where individuals should report pain intensity based on the last 7 days.

Disability will be obtained through self-report by the Brazilian version of the Roland-Morris Disability Questionnaire (RMDQ) (Nusbaum et al., 2001), which has 24 statements involving activities and pain situations, to which the patient is instructed to answer "yes" only to those described in the assessment day, and each answer corresponds to one point.

Perception of global improvement will be obtained through self-report by the Perception of Global Effect Scale (PGES), 11 points ranging from -5 ("much worse"), 0 ("no change") to +5 (completely recovered) (Costa et al., 2008). For all measures of perceived global effect participants will be asked: "Compared to the start of your first episode, how do you describe your low back pain in the past few days?". A highly positive score indicates greater recovery, while a negative score indicates worsening of symptoms.