title: Evening physical activity alters wrist temperature circadian rhythmicity.
abstract: The adequate time to perform physical activity (PA) to maintain optimal circadian system health has not been defined. We studied the influence of morning and evening PA on circadian rhythmicity in 16 women with wrist temperature (WT). Participants performed controlled PA (45 min continuous-running) during 7 days in the morning (MPA) and evening (EPA) and results were compared with a no-exercise-week (C). EPA was characterized by a lower amplitude (evening: 0.028 ± 0.01 °C versus control: 0.038 ± 0.016 °C; p < 0.05) less pronounced second-harmonic (power) (evening: 0.41 ± 0.47 versus morning: 1.04 ± 0.59); and achrophase delay (evening: 06:35 ± 02:14 h versus morning: 04:51 ± 01:11 h; p < 0.05) as compared to MPA and C. Performing PA in the late evening might not be as beneficial as in the morning.
authors: Department of Physiology, Faculty of Biology, University of Murcia , Murcia , Spain .
authors: Patricia
authors: P
authors: Rubio-Sastre
authors: Purificación
authors: P
authors: Gómez-Abellán
authors: Antonio
authors: A
authors: Martinez-Nicolas
authors: José María
authors: JM
authors: Ordovás
authors: Juan Antonio
authors: JA
authors: Madrid
authors: Marta
authors: M
authors: Garaulet
mesh_terms: D000204:Activity Cycles; D000328:Adult; D002940:Circadian Rhythm; D005260:Female; D006801:Humans; D009043:Motor Activity; D012420:Running; D012881:Skin Temperature; D013997:Time Factors; D014953:Wrist; D055815:Young Adult