None listed
Conditions
Brief summary
There has been previous reports that changes in sleep following exercise (either positive or negative) have been attributed to changes in core temperature, however, no studies to date have examine the effect of active (exercise) or passive heating on sleep quantity or quality. 12 participants will be recruited to complete three trials in a randomised order followed by sleep assessments (total sleep time, wake after sleep onset, sleep efficiency, sleep latency and sleep staging) using Actigraphy and Polysomnography and core temperature using an ingestible capsule. It is hypothesised that there will be a significant relationship with core temperature and sleep quality and changes in sleep staging.
Interventions
The participants will be required to complete three interventions in a randomised order. There will be a minimum of 7 day washout between each trial.
1. Control: no exercise-induced changes in core temperature and remain seated in a neutral (22C) environment.
2. Exercise-induced hyperthermia: aerobic exercise on a stationary exercise bike in hot, humid environment (33 degrees Celsius, 60% relative humidity) until core temperature increases by 1.5 degrees Celsius. The exercise duration will depe
The participants will be required to complete three interventions in a randomised order. There will be a minimum of 7 day washout between each trial. 1. Control: no exercise-induced changes in core temperature and remain seated in a neutral (22C) environment. 2. Exercise-induced hyperthermia: aerobic exercise on a stationary exercise bike in hot, humid environment (33 degrees Celsius, 60% relative humidity) until core temperature increases by 1.5 degrees Celsius. The exercise duration will dependent upon the core temperature rate of rise, however is anticipated to be 60-80min duration. 3. Passive hyperthermia: Seated in a hot, humid environment (33degrees Celsius, 60% relative humidity) until core temperature increases by 1.5 degrees Celsius. It is likely the passive heating will be 80-120minutes. All interventions will be in a climate-controlled chamber within an exercise laboratory and will be delivered and supervised by accredited exercise scientists (AES). Heart rate, core and skin temperatures, and perceptual ratings of exertion and thermal stress will be monitored every 5miniutes throughout the interventions.
Sponsors
Charles Sturt University
Study design
Allocation
Randomised controlled trial
Intervention model
Crossover
Primary purpose
Treatment
Masking
Open (masking not used)
Eligibility
Sex/Gender
Male
Age
18 Years to 60 Years
Healthy volunteers
Yes
Inclusion criteria
In order to volunteer in the project, participants must be: - Male - 18 years and over - Free or injury and illness - No conditions that may be exacerbated by heat or exercise - No known sleep conditions
Exclusion criteria
Exclusion criteria includes - Females - Known injury or illness - Known sleep condition - Shift worker - Travelled 3+ time zones within the previous week
Outcome results
None listed