Effect of Far Infrared Reflecting Sleepwear on Recovery and Sleep

NCT04273789 | Completed

• 1 other identifier: FIRsleepwear
• Study Type: interventional
• Target: 18
• Locations: 1 country
• Sites: 1

Brief Summary

Far infrared light (FIR, 5.6-1000 µm) penetrates our skin and reaches the underlying tissue up to 4 cm and promotes widening of the blood vessels (vasodilation). This results in increased blood flow in the tissue under the skin, without heating up the skin itself. Increased blood flow allows more oxygen to reach the muscles and more metabolic waste products to be transported away from the muscles. Studies assessing clothing containing an FDA approved ceramic particles covered yarn that reflect FIR light showed delayed onset muscle pain decreased and a reduction in inflammatory markers in professional athletes. The aim of this study is to investigate the effect of far infrared reflecting sleepwear on night-time recovery and Sleep in a broader population, namely physically active adults (non-professional).

Conditions

Exercise Induced Muscle Damage

Outcome Measures

Primary Outcomes (5)

• Change in time of flight during jump (s)

  Time of flight during jump is the time between offset and landing. The influence of the intervention is determined by comparing the values 72h post exercise bout of each week.

  72 hours post exercise bout in week 1 and week 2

• Change in maximum isometic leg force (N)

  Maximum isometic leg force will be measured while participants are lying on their back with knees 90 Degrees bend. They press against a vertically mounted force plate. The average of 3 measurements separated by 1 minute break is used.The influence of the intervention is determined by comparing the values 72h post exercise bout of each week.

  72 hours post exercise bout in week 1 and week 2

• Change in leg circumference (m)

  Circumference of the tight while standing will be measured using a measurement tape. The average of 3 measurements separated by 1 minute break is used. The influence of the intervention is determined by comparing the values 72h post exercise bout of each week.

  72 hours post exercise bout in week 1 and week 2

• Change in knee range of motion (Degrees)

  Active range of motion of the knee while lying on the stomach is determined using a goniometer. The influence of the intervention is determined by comparing the values 72h post exercise bout of each week.

  72 hours post exercise bout in week 1 and week 2

• Change in muscle soreness (rating on visual analog scale)

  Subjectively experienced delayed onset muscle soreness measured using a visual analog scale. The change in soreness over time is of interest, as well as the influence of the intervention. The influence of the intervention is determined by comparing the values 1, 2, 3, 4, 5, 6 and 7 post exercise bout of both weeks.

  1, 2, 3, 4, 5, 6 days post exercise bout in week 1 and week 2

Secondary Outcomes (1)

• Activity during night

  1, 2, 3, 4, 5, 6 days post exercise bout in week 1 and week 2

Study Arms (2)

far infrared reflecting sleepwear

EXPERIMENTAL

Sleepwear (shorts + tshirt) with far infrared reflecting ceramic print produced by Dagsmejan AG (Zurich, Switzerland)

Device: Far infrared reflecting sleepwear

Placebo sleepwear

PLACEBO COMPARATOR

Sleepwear (shorts + tshirt)

Device: Placebo sleepwear

Interventions

Far infrared reflecting sleepwear DEVICE

100% microlyocell sleepwear (shorts + shirt) with a ceramic print that reflects far infrared light (FIR, 5.6-1000 µm) emitted by the human body. Since FIR active garments are not powered, but reflect recycle light energy emitted by the body of the wearer, they have irradiances between 0.1-5 mW/cm\^2.

far infrared reflecting sleepwear

Placebo sleepwear DEVICE

100% microlyocell sleepwear (shorts + shirt)

Placebo sleepwear

Eligibility Criteria

• Age: 18 Years+
• Sex: male
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Physically active (\>3h of sports per week)
• BMI \< 25

You may not qualify if:

• Sleep problems (assessed using standardized questionnaire included in entrance questionnaire)
• Cardiovascular problems (self-reported in entrance questionnaire)
• Sensitive skin/allergies that present on a skin level (self-reported in entrance questionnaire)
• Knee pain while exercising (self-reported in entrance questionnaire)
• Night shift work during study period

Sponsors & Collaborators

• Swiss Federal Institute of Technology: lead

Study Sites (1)

SMS lab

Zurich, 8092, Switzerland

Location

Study Officials

• Robert Riener, Prof. Dr.

  Swiss FIT

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: TRIPLE
• Who Masked: PARTICIPANT, INVESTIGATOR, OUTCOMES ASSESSOR
• Masking Details: Prior to the study participants are informed about the study protocol, measurements and risks, but not about the study purpose. Debriefing is conducted verbally, as well as in written form and includes the signing of a second consent form. The experimenters conducting the measurements and analysis is not aware of the randomization. Unblinding is planned for interim analysis after 10 datasets have been collected and at study end.
• Purpose: TREATMENT
• Intervention Model: CROSSOVER
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: February 12, 2020
• First Posted: February 18, 2020
• Study Start: February 17, 2020
• Primary Completion: July 2, 2020
• Study Completion: July 2, 2020
• Last Updated: August 3, 2020

Record last verified: 2020-07

Data Sharing

• IPD Sharing: Will share
• Time Frame: The data will be ulpoaded to the research collection after study completion and is available there for a period of 15 years.
• Access Criteria: Open Access

Locations

CH (1)