Background <p>Pilates improves cardiorespiratory function, but little is known about the demands of Wunda Chair exercises.</p> Aims <p>To describe and compare cardiorespiratory responses in two different respiratory patterns (RP) during a Wunda Chair predefined sequence (WCPS), identifying its intensity.</p> Methods <p>Fifteen women (36 ± 6.5&#xa0;years) were evaluated by Dual-energy X-ray Absorptiometry (DXA) for physical characterization, and performed a maximum treadmill test and a WCPS. The WCPS (Pull Up, Going Up Front, Going Up Side, and Mountain Climber Prep) were performed in two conditions, RP1 (inhales in the pedal ascent phase and exhales in the pedal descent phase) and RP2 (the opposite pattern). The cardiorespiratory responses (oxygen consumption (VO₂), heart rate (HR), and rate of perceived exertion) were collected continuously during each task. Percentages were calculated from the maximum treadmill test findings, and the average values of cardiorespiratory responses were identified. Data comparison between the two RP was performed using the paired t test, the significance level adopted was p ≤ 0.05, and the effect size was calculated by Cohen’s d.</p> Results <p>The average VO_2peak (41.4 ± 5.7&#xa0;ml/kg/min) was considered good for the participants’ age. No statistical differences were found between RP. The Wunda Chair VO₂ average percentage (44%) indicates moderate intensity, and HR (62%) indicates light intensity in both RPs<b>.</b></p> Conclusion <p>This study findings can help professionals design effective Pilates programs by customizing the respiratory phase to meet individual needs.</p>