Methods: The data were collected as part of a randomized clinical trial
to test the effectiveness of a systematic exercise intervention on fatigue.
Participants were classified as exercisers or nonexercisers according to
the Surgeon General’s Guideline for Physical Activity criteria. Average
and worst fatigue levels in the prior 24 hours were measured on a 0–10
numeric rating scale at bedtime for 21 consecutive days beginning on
the day of chemotherapy.