en فيزيولوژی ورزشی و شاخه‌های وابسته بدان Sport Physiology and its related branches مقاله اصیل Original Article <div style="text-align: justify;"><span style="font-size:11pt"><span style="line-height:normal"><span style="font-family:Calibri,sans-serif"><b><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">Background. </span></span></b><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">Previous studies have reported that obesity is associated with poor respiratory function including reduction of functional residual capacity (FRC) and expiratory residual volume (ERV).<br> <b>Objectives.</b> To investigate the effect of forward trunk lean position (FTLP) combined pursed-lip breathing (PLB) on tidal volume (V_T), volume of oxygen (VO₂), the volume of carbon dioxide (VCO₂), heart rate (HR) during post-exercise recovery.<br> <b>Methods. </b>Twenty-two obese females performed two sitting positions, FTLP and upright position (UP) combined with PLB for 2 minutes after 40 minutes of running at moderate intensity. V_T, VO₂, VCO₂, HR were measured in these 2 minutes. The recorded values were averaged in 30s intervals.<br> <b>Results. </b>Although the average VT during FTLP+PLB was higher than UP+PLB, there was no statistically significant difference (30s: p=0.718, 60s: p=0.114, 90s: p=0.682, 120s: p=0.927). V_T in UP+PLB at the 90s decreased while V_T in FTLP+PLB at the 90s remained close to the highest point in the 60s. However, the difference was not significant. There were no significant differences in VO₂, VCO₂, and HR between FTLP+PLB and UP+PLB at all-time points.<br> <b>Conclusion.</b> FTLP+PLB and UP+PLB induce comparable changes in V_T, VO₂, VCO₂, and HR during recovery after moderate-intensity continuous exercise in obese females. FTLP+PLB seemed to be better for maintaining V_T during recovery.</span></span></span></span></span></div> Forward Trunk Lean Position, Pursed-Lip Breathing, Ventilation, Obesity, Recovery. 0 0 http://aassjournal.com/browse.php?a_code=A-11-2227-2&slc_lang=en&sid=1 Supattra Silapabanleng supattra.s@allied.tu.ac.th 100319475328460014011 100319475328460014011 No Department of Sports Science and Sports Development, Faculty of Allied Health Sciences, Thammasat University, Pathumthani, Thailand. Piriya Suwondit piriya.s@allied.tu.ac.th 100319475328460014012 0009-0003-3513-712X No Department of Sports Science and Sports Development, Faculty of Allied Health Sciences, Thammasat University, Pathumthani, Thailand. Vinitha Puengtanom vinitha.p@allied.tu.ac.th 100319475328460014013 100319475328460014013 No Department of Sports Science and Sports Development, Faculty of Allied Health Sciences, Thammasat University, Pathumthani, Thailand. Darawadee Panich darawadeemookpanich@gmail.com 100319475328460014014 0009-0000-4193-1280 No Department of Sports Science and Sports Development, Faculty of Allied Health Sciences, Thammasat University, Pathumthani, Thailand. Suttirak Artnarong sutthirak.art@dome.tu.ac.th 100319475328460014015 0009-0000-6453-0762 No Department of Sports Science and Sports Development, Faculty of Allied Health Sciences, Thammasat University, Pathumthani, Thailand. Thanyaporn Khongthaworn thanyapornkhongthaworn@gmail.com 100319475328460014016 0009-0002-1293-740X No Department of Sports Science and Sports Development, Faculty of Allied Health Sciences, Thammasat University, Pathumthani, Thailand. Chontiya Aumdee chontiya44@gmail.com 100319475328460014017 0009-0000-9107-896X No Department of Sports Science and Sports Development, Faculty of Allied Health Sciences, Thammasat University, Pathumthani, Thailand. Natiya Thongsen nnfonzz@gmail.com 100319475328460014018 0009-0003-2514-7973 No Department of Sports Science and Sports Development, Faculty of Allied Health Sciences, Thammasat University, Pathumthani, Thailand. Pongsiri Onta pongsiri34573@gmail.com 100319475328460014019 0009-0003-3620-4419 No Department of Sports Science and Sports Development, Faculty of Allied Health Sciences, Thammasat University, Pathumthani, Thailand. Sairag Saadprai sairag.saa@allied.tu.ac.th 100319475328460014020 100319475328460014020 Yes Department of Sports Science and Sports Development, Faculty of Allied Health Sciences, Thammasat University, Pathumthani, Thailand.