The Influence of Light Exposure on Exercise Performance Dependent on Chronotype.

Muscle Strength Clinical Trial

— EX-Light  

Official title:

The Influence of Different Light Exposures on Endurance Performance, Handgrip Strength and Reaction Time in Consideration of the Chronotype.

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT02203539
• Other study ID #: EKNZ 2014-056
• Status: Completed
• Phase: N/A
• First received: April 16, 2014
• Last updated: July 1, 2015
• Start date: July 2014
• Est. completion date: May 2015

Study information

• Verified date: July 2015
• Source: University of Basel
• Contact: n/a
• Is FDA regulated: No
• Health authority: Switzerland: Ethikkommission
• Study type: Interventional

Clinical 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.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 74
• Est. completion date: May 2015
• Est. primary completion date: May 2015
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Male
• Age group: 18 Years to 35 Years

Eligibility

Inclusion criteria:

• BMI 18 to 30 kg/m2

• endurance performance >= 55 ml/min/kg peak oxygen uptake

Exclusion criteria:

• 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

Study Design

Allocation: Randomized, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Basic Science

Related Conditions & MeSH terms

• Endurance Performance
• Muscle Strength
• Reaction Time

Intervention

Other:
• exposure to normal light
exposure for 60 minutes in duration
• exposure to bright light
exposure to bright light for 60 minutes of duration
• exposure to blue-enriched light
exposure to blue-enriched light for 60 minutes of duration

Locations

Country	Name	City	State
Switzerland	Department for Sport, Exercise and Health, Section Sports and Exercise Medicine, University of Basel	Basel

Sponsors (1)

Lead Sponsor	Collaborator
University of Basel

Country where clinical trial is conducted

Switzerland, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	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.	The outcome measure will be assesed at the end of the 12minute time trial ergometer test.	No
Secondary	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.	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.	No
Secondary	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.	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.	No

External Links

•   Project link EX-Light study