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

NCT02203539 | Completed DMC

• 1 other identifier: EKNZ 2014-056
• Study Type: interventional
• Target: 74
• Locations: 1 country
• Sites: 1

Brief 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.

Conditions

Endurance Performance; Reaction Time; Muscle Strength

Keywords

circadian rhythm; light exposure; exercise capacity; endurance; strength; reaction

Outcome Measures

Primary Outcomes (1)

• 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.

Secondary Outcomes (2)

• Reaction time in milliseconds (ms)

  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)

  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.

Study Arms (3)

bright light

EXPERIMENTAL

Intervention: exposure to bright light

Other: exposure to bright light

blue-enriched light

EXPERIMENTAL

Intervention: exposure to blue-enriched light

Other: exposure to blue-enriched light

normal light

EXPERIMENTAL

Intervention: exposure to normal light

Other: exposure to normal light

Interventions

exposure to normal light OTHER

exposure for 60 minutes in duration

normal light

exposure to bright light OTHER

exposure to bright light for 60 minutes of duration

bright light

exposure to blue-enriched light OTHER

exposure to blue-enriched light for 60 minutes of duration

blue-enriched light

Eligibility Criteria

• Age: 18 Years - 35 Years
• Sex: male
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• BMI 18 to 30 kg/m2
• endurance performance \>= 55 ml/min/kg peak oxygen uptake

You may not qualify if:

• 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

Sponsors & Collaborators

• University of Basel: lead

Study Sites (1)

Department for Sport, Exercise and Health, Section Sports and Exercise Medicine, University of Basel

Basel, 4052, Switzerland

Location

Study Officials

• Arno Schmidt-Trucksäss, Prof Dr

  Departement of Sports, Exercise and Health, University of Basel

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: BASIC SCIENCE
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Prof Arno Schmidt-Trucksäss, MD, MA

Study Record Dates

• First Submitted: April 16, 2014
• First Posted: July 30, 2014
• Study Start: July 1, 2014
• Primary Completion: May 1, 2015
• Study Completion: May 1, 2015
• Last Updated: July 2, 2015

Record last verified: 2015-07

Locations

CH (1)