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Figure 1 | BMC Pulmonary Medicine

Figure 1

From: A double blind randomized placebo control crossover trial on the effect of dietary nitrate supplementation on exercise tolerance in stable moderate chronic obstructive pulmonary disease

Figure 1

Study design. Visits 1 and 2 occurred approximately 1 week apart and collected baseline and safety data on participants. Visits 3 and 4 were exactly 7 days apart per study protocol. Prior to visit 3, participants consumed either beetroot (BR) or placebo (PL) twice a day for three days. They underwent an endurance shuttle walk test during visit 3 and then abstained from BR for 4 days to allow washout. In the crossover phase, participants were given to whichever juice (BR or PL) they had not previously been exposed to. This was taken twice a day for three days prior to visit 4, at which time another endurance shuttle walk test was performed.

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BMC Pulmonary Medicine

ISSN: 1471-2466

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