Endurance PerformanceEX-LightNCT02203539
The Influence of Light Exposure on Exercise Performance Dependent on Chronotype.
A study testing exposure to normal light, exposure to bright light and exposure to blue-enriched light in people with Endurance Performance and Reaction Time, run by University of Basel at 1 site in Switzerland.
Trial summary
The purpose of this study is to determine if an exposure to light in the evening has a positive influence on physical performance regarding endurance, strength and reaction time. Read more about this study
- Who is it for?
- Ages 18 to 35 years, men onlyHealthy volunteers can take part
- Conditions the study is for
- Endurance Performance, Reaction Time, Muscle Strength
- What is being tested?
- exposure to normal light, exposure to bright light and exposure to blue-enriched light
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 74 participants
- Where
- 1 siteSwitzerland
- Study dates
- Jul 2014to May 2015
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 35 years
- Men only
- Healthy volunteers accepted
- Adult
Who may be able to join
- BMI 18 to 30 kg/m2
- endurance performance >= 55 ml/min/kg peak oxygen uptake
Who cannot join
- cardiovascular disease
- renal dysfunction
- shiftworking
- travels over time zones in the last 4 weeks
- high blood pressure (systolic blood pressure >170mmHg, diastolic blood pressure >100mmHg)
- depression
Trial locations and contacts
1 site in 1 country.
Switzerland1 site
Department for Sport, Exercise and Health, Section Sports and Exercise Medicine, University of Basel
Basel, 4052
About this study
Official title: The Influence of Different Light Exposures on Endurance Performance, Handgrip Strength and Reaction Time in Consideration of the Chronotype.
The purpose of this study is to determine if an exposure to light in the evening has a positive influence on physical performance regarding endurance, strength and reaction time.
- Conditions
- Endurance Performance, Reaction Time, Muscle Strength
- Being tested
- exposure to normal light, exposure to bright light, exposure to blue-enriched light
- Keywords
- circadian rhythm, light exposure, exercise capacity, endurance, strength, reaction
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
exposure to normal lightOther
exposure for 60 minutes in duration
exposure to bright lightOther
exposure to bright light for 60 minutes of duration
exposure to blue-enriched lightOther
exposure to blue-enriched light for 60 minutes of duration
| Study group | Role | What they receive |
|---|---|---|
| bright light | Experimental | Intervention: exposure to bright light Receives: Other: exposure to bright light |
| blue-enriched light | Experimental | Intervention: exposure to blue-enriched light Receives: Other: exposure to blue-enriched light |
| normal light | Experimental | Intervention: exposure to normal light Receives: Other: exposure to normal light |
What is being measured
The primary outcome is the main question the study is designed to answer.
Work performed in kilo Joule (kJ) during the time trial ergometer test adjusted for the VO2peak.
Participants will perform one baseline test (ergometer ramp test) and seven days later a twelve minute lasting ergometer time trial test which starts 10 minutes after an exposure to light for 60minutes. The work performed in kilo Joule during the time trial ergometer test will be assesed at the end of the time trial and will be the main outcome measure and adjusted for the VO2peak meausred during the baseline test.
Measured: The outcome measure will be assesed at the end of the 12minute time trial ergometer test.
Secondary outcomes (2)
Reaction time in milliseconds (ms)
Participants will perform one baseline reaction time task 20 to 15 minutes before the light exposure. 0 to 5 minutes after the 60 minutes lasting light exposure they will perform the reaction task again. The time in milliseconds from the reaction task after the light exposure will be the secondary outcome measure and adjusted for the baseline test before light exposure.
Measured: Reaction time task will be performed at baseline (20 to 15 minutes before the light exposure) and 0 to minutes after the light exposure which will be the secondary outcome measure.
Maximum handgrip strength in kilo gramm (kg)
Participants will perform one baseline maximum hand grip strength test 15 to 10 minutes before the 60 minutes lasting light exposusre and perform a second test, which will be the outcome measure 5 to 10 minutes after the light exposure. The strength in kg will be adjusted for the strength in kg measured at baseline.
Measured: Maximum handgrip strength will be tested at baseline (15 to 10 minutes before the light exposure) and 5 to 10 minutes after the 60 minutes lasting light exposure.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted30 Jul 2014 (estimated)
- Study startJul 2014
- Primary completionMay 2015
- Study completionMay 2015
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Endurance PerformanceStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Basic science
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 74 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Basel
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Arno Schmidt-Trucksäss, University of Basel
- Investigators
- Arno Schmidt-Trucksäss, Prof Dr, Principal investigator, Departement of Sports, Exercise and Health, University of Basel
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT02203539
- Sponsor's protocol ID
- EKNZ 2014-056
- Acronym
- EX-Light
- Status last verified
- Jul 2015
- First submitted
- 16 Apr 2014
- Last updated
- 2 Jul 2015
- Results posted
- No
- Data monitoring committee
- Yes
Study at a glance
From the registry record, last updated by the sponsor on 2 Jul 2015. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Influence of Different Light Exposures on Endurance Performance, Handgrip Strength and Reaction Time in Consideration of the Chronotype.
- ClinicalTrials.gov ID
- NCT02203539
- Acronym / sponsor ID
- EX-Light / EKNZ 2014-056
- Conditions
- Endurance Performance, Reaction Time, Muscle Strength
- Keywords
- circadian rhythm, light exposure, exercise capacity, endurance, strength, reaction
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 74 participants (actual)
- Lead sponsor
- University of BaselUniversity, hospital or other
- Study start
- Jul 2014
- Primary completion
- May 2015 (actual)
- Study completion
- May 2015 (actual)
- First posted
- 30 Jul 2014 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The purpose of this study is to determine if an exposure to light in the evening has a positive influence on physical performance regarding endurance, strength and reaction time.
Study design
- Primary purpose
- Basic science
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 3
| Arm | Type | Receives |
|---|---|---|
| bright light | Experimental | Other: exposure to bright lightIntervention: exposure to bright light |
| blue-enriched light | Experimental | Other: exposure to blue-enriched lightIntervention: exposure to blue-enriched light |
| normal light | Experimental | Other: exposure to normal lightIntervention: exposure to normal light |
Who may qualify
- Ages
- 18 to 35 years
- Sex
- Male only
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (2 listed)
- BMI 18 to 30 kg/m2
- endurance performance >= 55 ml/min/kg peak oxygen uptake
Key exclusion criteria (6 listed)
- cardiovascular disease
- renal dysfunction
- shiftworking
- travels over time zones in the last 4 weeks
- high blood pressure (systolic blood pressure >170mmHg, diastolic blood pressure >100mmHg)
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| exposure to normal lightexposure for 60 minutes in duration | Other | normal light |
| exposure to bright lightexposure to bright light for 60 minutes of duration | Other | bright light |
| exposure to blue-enriched lightexposure to blue-enriched light for 60 minutes of duration | Other | blue-enriched light |
Primary outcome
Work performed in kilo Joule (kJ) during the time trial ergometer test adjusted for the VO2peak.
Time frame: The outcome measure will be assesed at the end of the 12minute time trial ergometer test.
Participants will perform one baseline test (ergometer ramp test) and seven days later a twelve minute lasting ergometer time trial test which starts 10 minutes after an exposure to light for 60minutes. The work performed in kilo Joule during the time trial ergometer test will be assesed at the end of the time trial and will be the main outcome measure and adjusted for the VO2peak meausred during the baseline test.
2 secondary outcomes
Reaction time in milliseconds (ms)
Time frame: Reaction time task will be performed at baseline (20 to 15 minutes before the light exposure) and 0 to minutes after the light exposure which will be the secondary outcome measure.
Maximum handgrip strength in kilo gramm (kg)
Time frame: Maximum handgrip strength will be tested at baseline (15 to 10 minutes before the light exposure) and 5 to 10 minutes after the 60 minutes lasting light exposure.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 2 Jul 2015.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Arno Schmidt-Trucksäss, Prof Dr principal investigator
Departement of Sports, Exercise and Health, University of Basel
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing exposure to normal light, exposure to bright light and exposure to blue-enriched light in people with Endurance Performance and Reaction Time, run by University of Basel at 1 site in Switzerland.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 6 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 2 Jul 2015. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Switzerland. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Work performed in kilo Joule (kJ) during the time trial ergometer test adjusted for the VO2peak. (time frame: The outcome measure will be assesed at the end of the 12minute time trial ergometer test.). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 2 Jul 2015.