Data di Pubblicazione:
2012
Citazione:
Can the knowledge of chronotype be useful for the motivation and the training plans? / J.A. Vitale, D. Formenti, G. Alberti, A. Weydahl, F. Carandente, J. Padulo. - In: SPORT SCIENCES FOR HEALTH. - ISSN 1824-7490. - 8:1 suppl.(2012 Sep), pp. 8-9. ((Intervento presentato al 4. convegno SISMES National Congress tenutosi a Palermo nel 2012.
Abstract:
Introduction: General knowledge of “time of day” effects on exercise
might not be enough, since everyone can have a different circadian
propensity (chronotype) based on their position on a Morningness-
Eveningness Scale (ranges from a morning-type = M-type to evening-
type = E-type, or neither-type = N-type) (3). In this project we studied
the response to the same physical activity performed in the morning and evening by different chronotypes.
Methods: Each of 22 subjects (12 males and 10 females, age: 23.2 ±
3.6, BMI: 22.45 ± 2.7) filled out the Horne-Ostberg Morningness-
Eveningness Questionnaire (MEQ) and the results have been com-
pared to the Morningness-Eveningness Scale to determine their
chronotype (3). They then performed, at their own voluntary speed, a
walking session, consisting of three repetitions uphill and downhill,
first in the late afternoon at 16:30h and then the next morning at 8:30h.
The performance time was recorded by an EKT-orienteering system.
Each subject wore a HR monitor (PolarTeam 2) to record their HR
during each entire walking session and reported their perceived exer-
tion (Borg scale 6-20) upon completion (1).
Results: MEQ= 14 N-types, 4 E-types and 4 M-types. Results from
one M-type, one E-type and two N-types (as controls) are discussed in
detail for the case-study. The M-type walked faster in the morning
than in the late afternoon, but showed no difference in HR response.
Conversely, the E-type walked faster in the evening than in the morn-
ing, with similar HR in both sessions. The N-types showed increased
HR when performance time decreased.
Conclusion: This case-study showed that response to physical activi-
ty can be influenced by chronotype, in agreement with other reports in
the literature (2),(4). While a follow-up study with more subjects is
necessary, the results suggest that when trying to increase the health
and well-being in the population, it would be advisable to arrange
physical activity classes both in the morning and in the evening, and
have the public join the classes according to their chronotype to
achieve the most benefit.
References
1. Borg, G. A. (1982). Psychophysical bases of percieved exertion.
Medicine and Science In Sports and Exercise, 14(5), 377-381
2. Brown, F. M., Neft, E. E., & LaJambe, C. M. (2008). Collegiate
rowing crew performance varies by morningness-eveningness. J
Strength Cond Res, 22(6), 1894-1900
3. Horne, J. A., & Ostberg, O. (1976). A self-assessment questionnaire
to determine morningness-eveningness in human circadian rhythms.
Int J Chronobiol, 4(2), 97-110
4. Sugawara, J., Hamada, Y., Nishijima, T., & Matsuda, M. (2001).
Diurnal variations of post-exercise parasympathetic nervous reacti-
vation in different chronotypes. Jpn Heart J, 42(2), 163-171
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
chronotype ; self-paced exercise ; health
Elenco autori:
J.A. Vitale, D. Formenti, G. Alberti, A. Weydahl, F. Carandente, J. Padulo
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