Current data confirm that the 6MWT , ISWT and ESWT are valid , reliable and responsive to change with some interventions .
However , results are sensitive to small changes in methodology .
Field walking tests are commonly employed to evaluate exercise capacity , assess prognosis and evaluate treatment response in chronic respiratory diseases .
In recent years , there has been a wealth of new literature pertinent to the conduct of the 6-min walk test ( 6MWT ) , and a growing evidence base describing the incremental and endurance shuttle walk tests ( ISWT and ESWT , respectively ) .
The aim of this document is to describe the st and ard operating procedures for the 6MWT , ISWT and ESWT , which can be consistently employed by clinicians and research ers .
Exertional oxygen of limited benefit in patients with chronic obstructive pulmonary disease and mild hypoxemia.
It is unclear whether short-term benefits from supplemental oxygen translate into improved quality of life in patients with severe COPD . In a 12 wk double-blind r and omized crossover study , we assessed the effects of supplemental air and oxygen on exercise performance ( step tests and 6 min walking distance [ 6MWD ] ) initially and after two 6 wk periods at home using exertional cylinder air or oxygen . We measured quality of life at baseline and after the two 6 wk domiciliary periods . The 26 patients ( 24 males ) had a mean age of 73 + /- 6 yr ; mean FEV1 , 0.9 + /- 0.4 L ; mean DLCO , 10.6 + /- 2.4 ml/min/mm Hg ; mean resting PO2 , 69 + /- 8.5 ( range 58 to 82 ) mm Hg ; mean PCO2 , 41 + /- 3.3 mm Hg ; and mean resting SaO2 , 94 + /- 2.1 ( mean + /- SD ) . Laboratory tests were performed breathing intranasal air or oxygen at 4 L/min , and measurements were made of SaO2 and Borg dysnea scores .  Supplemental oxygen increased 6MWD and steps by small , statistically significant increments acutely at baseline and after 6 and 12 wk , without corresponding falls in Borg score . Degree of desaturation at baseline did not correlate with increase in 6MWD or steps achieved at baseline or at 6 or 12 wk , nor with the domiciliary gas used . There was no difference in 6MWD or steps achieved while breathing supplemental oxygen after 6 wk of domiciliary oxygen compared with domiciliary air . Small improvements in quality of life indices were found after domiciliary oxygen , and mastery also improved after domiciliary air . There were no differences in quality of life , however , when domiciliary oxygen was compared with domiciliary air . Although oxygen supplementation induced small acute increments in laboratory exercise performance , such improvements had little impact on the patients ' daily lives
Current data confirm that the 6MWT , ISWT and ESWT are valid , reliable and responsive to change with some interventions .
However , results are sensitive to small changes in methodology .
Field walking tests are commonly employed to evaluate exercise capacity , assess prognosis and evaluate treatment response in chronic respiratory diseases .
In recent years , there has been a wealth of new literature pertinent to the conduct of the 6-min walk test ( 6MWT ) , and a growing evidence base describing the incremental and endurance shuttle walk tests ( ISWT and ESWT , respectively ) .
The aim of this document is to describe the st and ard operating procedures for the 6MWT , ISWT and ESWT , which can be consistently employed by clinicians and research ers .