Effects of BEMER Electromagnetic Field Intervention on Sleep, Readiness to Play and Injuries in Elite Athletes

NCT07299669 | Completed

• 1 other identifier: BeSCN 25/1
• Study Type: interventional
• Target: 60
• Locations: 1 country
• Sites: 2

Brief Summary

Elite athletes (female football players) will be randomized to 1 of 2 conditions, comprising a BEMER electromagnet field mattress and a sham-mattress. The mattress is to be used in bed for 8 minutes each morning, and for 8 minutes each evening, for 10 weeks. The system has 3 intensity levels - low, medium, and high. The low level will be used for the 4 first weeks, the medium level for the following 2 weeks, and the high level for the last 4 weeks. Those in the sham conditions have a display and mattress looking identical, and follow the same procedure as those in BEMER electromagnet field mattress condition. The primary outcome comprises total sleep time and sleep efficacy assessed with a sleep radar as well as readiness to play (composite measure of daily self-report of fatigue, sleep quality, muscle soreness, stress and mood). Secondary outcomes comprise duration of deep sleep also assessed with the sleep radar, injury severity, and rate of perceived exertion following training and matches. Baseline registrations are conducted for 4 weeks prior to the intervention and outcomes are registered during the last 4 weeks of the intervention.

Conditions

Fatigue Recovery

Keywords

BEMER; Athletes; Recovery; Sleep; Injury; Readiness to play; Rate of perceived exertion

Outcome Measures

Primary Outcomes (3)

• Total sleep time

  Total sleep time in the main sleep episode assessed with the sleep radar Somnofy, expressed as minutes per day. High total sleep time is regarded as a more positive outcome than a lower total sleep time.

  Change from baseline (4 weeks before interventions) to the last 4 weeks of the intervention.

• Sleep efficiency

  Percentage of time in bed following shut-eye (lights out) to rising from bed where the participant did sleep - assessed with the sleep radar Somnofy during the main sleep period. The measure comprises the percentage of time being asleep, and higher values (percentage) are regarded as a better outcome than lower values (percentage).

  Change from baseline (4 weeks before intervention) to the last 4 weeks of the intervention

• Readiness to play

  Daily morning self-report on an adapted version of the Hooper Index (Hooper, Mackinnon, Howard, Gordon, \& Bachmann, 1995), comprising four items assessing fatigue, sleep quality, muscle soreness, and stress. Each item is rated on a 7-point scale ranging from 1 to 7 (where 7 is the worst state and 1 is the best state). A composite daily score ranging from 4 to 28 is calculated - lower scores are associated with the best outcomes.

  Change from baseline (4 weeks before intervention) to the last 4 weeks of the intervention

Secondary Outcomes (6)

• Total sleep time the day following matches

  Change from baseline (4 weeks before interventions) to the last 4 weeks of the intervention exclusively on the nights after matches.

• Sleep efficiency the day following matches

  Change from baseline (4 weeks before intervention) to the last 4 weeks of the intervention exclusively the night following matches.

• Readiness to play the day after matches

  Change from baseline (4 weeks before intervention) to the last 4 weeks of the intervention, exclusively on the day after matches.

• Deep sleep duration

  Change from baseline (4 weeks before intervention) to the last 4 weeks of the intervention

• Health problems

  Change from baseline (4 weeks before interventions) to the last 4 weeks of the intervention.

Study Arms (2)

BEMER electromagnetic-energy-regulation therapy

EXPERIMENTAL

BEMER electromagnetic mattress; week 1-4 at low lever, week 5-6 medium level and week 7-10 high level

Device: BEMER electromagnetic-energy-regulation therapy

Sham-mattress

SHAM COMPARATOR

Mattress and interface panel similar to the experimental intervention, but without any electromagnetic output signals

Device: Sham (No Treatment)

Interventions

BEMER electromagnetic-energy-regulation therapy DEVICE

The BEMER is bio-electric-magnetics-energy-regulation therapy uses a specific waveform of pulsed electromagnetic field (PEMF) to improve microcirculation by 30%. In the present study the bio-electric-magnetics-energy-regulation therapy will be provided through mattresses

Also known as: BEMER

BEMER electromagnetic-energy-regulation therapy

Sham (No Treatment) DEVICE

Sham mattress with no electromagnetic output

Sham-mattress

Eligibility Criteria

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

You may qualify if:

• Minimum 18 years of age
• Female elite football player in Norway
• Playing on team willing to part-take in the study

You may not qualify if:

• None

Sponsors & Collaborators

• University of Bergen: lead
• Western Norway University of Applied Sciences: collaborator
• Norwegian University of Science and Technology: collaborator

Study Sites (2)

Bergensregionen

Bergen, Norway

Location

Osloregionen

Oslo, Norway

Location

MeSH Terms

Conditions

Wounds and Injuries

Study Officials

• Ståle Pallesen, PhD

  University of Bergen

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: TRIPLE
• Who Masked: PARTICIPANT, INVESTIGATOR, OUTCOMES ASSESSOR
• Purpose: BASIC SCIENCE
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Professor

Model Details: The two arms/conditions involves an electromagnetic mattress and an sham-mattress

Study Record Dates

• First Submitted: November 26, 2025
• First Posted: December 23, 2025
• Study Start: January 18, 2025
• Primary Completion: October 15, 2025
• Study Completion: October 15, 2025
• Last Updated: January 6, 2026

Record last verified: 2025-11

Data Sharing

• IPD Sharing: Will share
• Shared Documents: STUDY PROTOCOL
• Time Frame: From January 1, 2027
• Access Criteria: Researchers with a phd and relevant background can access the material. In order to get the material they need to contact the PI. They will be provided with the study protocol

Locations

NO (2)