Introduction And Objective: Endurance training during PR requires exercise prescription at sufficient intensity to achieve physiological benefits. This analysis sought to investigate whether walking training prescribed from 6-minute walk test (6MWT) average speed provides an appropriate training intensity for people with ILD during PR.
Methods: Individuals with ILD completed cardiopulmonary exercise test (CPET) and 6MWT in random order. A 10-minute constant speed treadmill walk test (10MTW) was undertaken at 80% of the average 6MWT speed. Oxygen uptake (VO) was measured during all tests. Percentage VOpeak during 10MTW was main outcome measure.
Results: Eleven people with ILD (age 71 (8) years; forced vital capacity 73 (18) %predicted, 6-minute walk distance 481 (99) meters, and VOpeak during CPET 1.3 (0.2) L.min) undertook testing. Average VOpeak during 10MTW was 91 (18) % of CPET VOpeak [range 67-116%]. Participants who achieved a greater VOpeak during CPET walked at a smaller %VOpeak during 10MTW (r = -0.6; p = .04).
Conclusions: For people with ILD, walking training prescribed at 80% of 6MWT average speed can provide adequate exercise training intensity for PR.
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