RT Journal Article SR Electronic T1 30-second chair-stand test is a valuable evaluation in chronic respiratory diseases JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP P4286 VO 44 IS Suppl 58 A1 Daigo Kato A1 Makoto Fueki A1 Yasuhiro Endo A1 Daisuke Uga A1 Kunio Dobashi A1 Rie Nakazawa A1 Masaaki Sakamoto YR 2014 UL http://erj.ersjournals.com/content/44/Suppl_58/P4286.abstract AB [Introduction] 6-Minute Walk Test (6MWT) is a valuable tool for measuring exercise tolerance in patients with chronic respiratory diseases (CRD). However, severe CRD patients often show marked depression in SpO2 during or after walking that leads to interruption of 6MWT. Therefore we tried to evaluate their exercise tolerance by 30-second Chair-Stand Test (CS-30). CS-30 used to be performed for evaluating physical fitness in elderly who were instructed to stand up and sit down on the chair as fast as possible during a 30-second period. This study is aimed at confirming usefulness of CS-30 as one of safe assessments for exercise tolerance in CRD.[Methods] 33 patients with CRD (18 COPD / 15 IPF. Age73.7±9.6 yrs) performed 6MWT and CS-30. SpO2 was recorded before and after the tests. In COPD, muscle strength of quadriceps was measured by hand-held dynamometer.[Results] Significant correlation between 6-minute walking distance (383.0±99.6m) and frequency of standing-up (13.9±4.4times) was found (p<0.05, r=0.591).Significant difference was found in SpO2 depression between 6MWT (-8.7±7.2%) and CS-30 (-1.7±2.0%) (p<0.01).Significant difference was found in SpO2 depression after 6MWT between COPD (-8.3±7.6%) and IPF (-.012±8.1%) (p<0.05).Significant correlation between frequency of standing-up and muscle strength of quadriceps was found(p<0.05, r=0.518(Rt), 0.710(Lt)).[Conclusion] CS-30 can evaluate exercise tolerance in patients with CRD like 6MWT. This study suggests that CS-30 is a valuable method to evaluate exercise tolerance in CRD patients who show SpO2 depression with exercise.