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. 2020 Jan 6;15:1–13. doi: 10.2147/COPD.S217474

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© 2020 Holz et al.

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Study design. Time point (TP) 1 and TP2 (5 mins after the start of exercise) were fixed, while constant-load exercise was performed until the subject was exhausted; TP3 was therefore different between individuals (maximum duration 30 mins). The period of rest was always 20 mins following the end of the exercise.

Abbreviations: TP, time point; mins, minutes.