Effects of time of day on power output and thermoregulation responses during cycling over a simulated hilly course in the heat (35C)
Journal Title: Biology of Exercise - Year 2008, Vol 4, Issue 0
Abstract
The aim of the present investigation was to compare responses to sustained exercise in the morning and evening in the heat (35°C) over a hilly prolonged simulated course. The thermoregulatory response examined was core temperature (Tc). In addition power output, and time were examined. Eight active males (25- 40 years) were instructed to work as hard as possible over the entire exercise period, with variation of pedal frequency permitted at any time. Two prolonged sessions were performed at 08:00 and 17:00 h, and counterbalanced with at least 5 days recovery between tests. The examined variables showed no significant main effect for time of day. Mean power output in the evening was greater by 9 Watts (W) in comparison to the morning exercise. Furthermore, time increased by 2.8% in the evening compared to the morning. Future studies should include the examination of circadian rhythms and performance during undulating courses using each grat period.
Authors and Affiliations
KONSTANTINOS BARDIS| Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, GREG ATKINSON| Research Institute for Sport and Exercise Sciences, Liverpool John Moores University
Keywords
Related Articles
- EP ID EP15797
- DOI http:dx.doi.org/10.4127/jbe.2008.4.17-28
- Views 404
- Downloads 25
Intermediary Effects for Adults’ Physical Activity: Comparison of two Structural Models
studies have indicated that past physical activity (pa) participation, exercise self-efficacy (ese), friend support for pa and environmental factors enhance pa. No study has investigated the aforementioned factors with...
Ankle sprain injuries in soccer players aged 7-15 years during a one-year season
Although ankle sprains are common in soccer, the role of various risk factors in soccer players aged 7-15 is unclear. The purpose of this study was to examine whether incidence of ankle sprain injuries, associated time...
A Comparative study of Baseball and cricket injuries and their effect to prevent injuries in both sport events
Cricket and baseball is the most popular sport in all over the world and millions of peoples in this world enjoy and participate in bat-and-ball sports, like baseball and softball. Cricket, at different levels in the w...
The effects of functional fatigue on dynamic postural control of badminton players as measured by Y balance test
Good postural control provides inherent protection against lower limb joint injuries and several studies have been implemented in order to examine the effect of fatigue as an unavoidable component of daily activities an...
Isokinetic muscle strength and running long jumpperformance in young jumpers
The aim of this study was two-fold. Firstly we wanted to quantify the relationship of isokinetic muscle strength (IMS) and long jump performance (LJP) in young jumpers, and secondly to compare males and females in IMS...