Circadian rhythm, activity level, training habits and sports performance : the molecular and subjective components

Circadian rhythmicity, which is driven by a circadian clock, is a property of a biological process that displays an oscillation of approximately 24-hours even in the absence of external time cues. Individual differences in the preferred times of waking, activity and rest (sleep) are known as chronotype or diurnal preference; which arise due to differences in circadian rhythmicity due to the fact that rhythms are not exactly 24-hours. Various polymorphisms of certain genes involved in circadian rhythm generation have been associated with extreme chronotype. Of interest to this study is the PER3 gene as it has a variable number tandem repeat (VNTR) polymorphism in the coding region, which is repeated either four of five times, encoding proteins of different lengths.

Grantor dc:publisher.institution

MRC/UCT RU for Exercise and Sport Medicine

Year dc:date.issued

2013

Author dc:creator

• Stephenson, Kim Jenna

Advisors dc:contributor.advisor

• Rae, Dale
• Roden, Laura

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/11427/5925

OAI identifier oai:identifier

oai:open.uct.ac.za:11427/5925