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Physical activity, vaso‐occlusive crises and pain in patients with sickle cell anaemia in Senegal
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International audience. Acute physical exercise may trigger vaso-occlusive crises (VOC) in patients with sickle cell anaemia (SCA), creating uncertainty around physical activity (PA) recommendations. This cross-sectional study examined the relationships between PA, VOC and steady-state pain in 104 Senegalese male patients with SCA. PA was objectively measured over 5 weeks, recording daily steps and time spent in different PA intensities (expressed in metabolic equivalent of task, MET). VOC occurrence was tracked, and steady-state days excluded VOC days plus 2 days before and after. Pain frequency and intensity on steady-state days were recorded via diaries, and blood viscosity was measured. Ninety-eight patients (29 ± 8 years old) completed the study, averaging 9611 ± 4040 steps/day, with 293 ± 108, 64 ± 69 and 28 ± 32 min in ≥1.5, ≥3.0, and ≥6.0 MET PA respectively. Median daily step count and PA duration were not associated with VOC occurrence. However, higher step counts and more time in ≥1.5 and ≥6.0 MET PA correlated with lower pain frequency and intensity (on steady-state days) and lower blood viscosity. These findings suggest that PA may benefit patients with SCA, but further research is needed to establish guidelines.
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