Factors to consider when assessing diurnal variation in sports performance: the influence of chronotype and habitual training time-of-day.
Eur J Appl Physiol
; 115(6): 1339-49, 2015 Jun.
Article
em En
| MEDLINE
| ID: mdl-25631930
ABSTRACT
PURPOSE:
The aim of this study was to compare morning and evening time-trial performance, RPE and mood state of trained swimmers, taking into account chronotype, habitual training time-of-day and PERIOD3 (PER3) variable number tandem repeat genotype.METHODS:
Twenty-six swimmers (18 males, age 32.6 ± 5.7 years) swam 200 m time trials (TT) at 06h30 and 18h30 in a randomised order.RESULTS:
There was no difference between morning and evening performance when the swimmers were considered as a single group (06h30 158.8 ± 22.7 s, 18h30 158.5 ± 22.0 s, p = 0.611). However, grouping swimmers by chronotype and habitual training time-of-day allowed us to detect significant diurnal variation in performance, such that morning-type swimmers and those who habitually train in the morning were faster in the 06h30 TT (p = 0.036 and p = 0.011, respectively). This was accompanied by lower ratings of perceived exertion (RPE) scores post-warm-up, higher vigour and lower fatigues scores prior to the 06h30 TT in morning-type swimmers or those who trained in the morning. Similarly, neither types and those who trained in the evenings had lower fatigue and higher vigour prior to the 18h30 TT.CONCLUSIONS:
It appears that both chronotype and habitual training time-of-day need to be considered when assessing diurnal variation in performance. From a practical point of view, athletes and coaches should be aware of the potentially powerful effect of training time on shifting time-of-day variation in performance.
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Ritmo Circadiano
/
Desempenho Atlético
Tipo de estudo:
Clinical_trials
Limite:
Adolescent
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Adult
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Female
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Humans
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Male
Idioma:
En
Ano de publicação:
2015
Tipo de documento:
Article