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CompletedNCT06063135EPOCHUpdated Jun 25, 2025

Effects of Physical Exercise Timing On Strength and Cardiometabolic Health

An interventional study of Physical Exercise Intervention in Physical Inactivity, sponsored by University of Basel. Completed at 1 site in Switzerland. Open to participants aged 60 Years to 80 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-06-25.

Sponsored by University of Basel · Not applicable, Interventional, and Prevention

Phase
Not applicable
Study type
Interventional
Enrollment
152
Allocation
Randomized
Ages
60 Years to 80 Years
Sex
All
01

Study summary

Physical exercise is well known to improve human health. Current guidelines provide recommendations on the frequency, intensity, type and duration of exercise. However, they do not provide recommendations for the time of day, exercise should be performed. This is surprising considering that the influence of timing of behaviors such as sleep or nutrition as well as the impact of the circadian timing system on health are well documented. Further, there is evidence for diurnal variation in maximum performance which enables individuals to exercise with different intensities at different times of day, which in the long term might affect physical adaptations to exercise. Thus, this research study investigates if exercise timing impacts human health.

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Conditions studied

  • Physical Inactivity

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03

In context

Sedentary Behavior

332 studies on the registry are indexed under Sedentary Behavior; 155 are open to participants now.

This study's enrollment of 152 is above the median of 70 across 287 interventional studies indexed under Sedentary Behavior.

Browse Sedentary Behavior studies →

Lead sponsor

University of Basel is the lead sponsor of 61 studies on the registry; 9 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
60 Years to 80 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • BMI 18.5 - 30 kg/m2

Exclusion criteria

Exclusion Criteria:

  • Structured resistance training within the last six months
  • Ongoing shift work
  • Irregular bedtime (> 2 hours variation in habitual bed time)
  • Smoking
  • Travels across more than two time zones within the last four weeks
  • Inability to follow the study procedures (e.g. due to language barriers, psychological disorders, dementia, etc.)
  • Known pregnancy or lactating women
  • Participation in any other clinical trial within the last four weeks
  • Medical condition that is a contra indicator for resistance training, endurance training, or exercising until maximum exhaustion including insufficiently controlled blood pressure (systolic > 170 mmHg, diastolic > 100 mmHg), ongoing cancer treatment, unstable angina pectoris, uncontrolled bradyarrhythmia or tachyarrhythmia, severe uncorrected valvular heart disease, clinically relevant acute infection, any form of musculoskeletal injury, orthopedic problems or decompensated cardiovascular disease
  • Insulin dependent diabetes
  • Participants using metformin
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Study design

Phase
Not applicable
Primary purpose
Prevention
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Investigator)
Enrollment
152 participants (actual)

Study arms

  • No intervention
    Control

    Single life-style coaching session

  • Experimental
    Exercise Time 1

    Physical exercise intervention taking place at one time of the day

    Other: Physical Exercise Intervention

  • Experimental
    Exercise Time 2

    Physical exercise intervention taking place at another time of day

    Other: Physical Exercise Intervention

Interventions

  • OtherPhysical Exercise Intervention

    Two strength training session per week and one endurance training session per week

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What researchers measure

Primary outcomes

  1. Maximum strength

    Mean value of the maximum isometric strength assessed at four different times of the day with an isometric mid-thigh pull on a force plate.

    Time frame: Pre-Intervention (i.e. 1 to 28 days before the first training session of the exercise intervention) and Post-Intervention (i.e. 1 to 28 days after the last training session of the exercise intervention)

Secondary outcomes

  1. Glucose control

    2-h postprandial area under the curve for glucose after an oral glucose tolerance test

    Time frame: Pre-Intervention (i.e. 1 to 28 days before the first training session of the exercise intervention) and Post-Intervention (i.e. 1 to 28 days after the last training session of the exercise intervention)

  2. Body composition

    total body fat mass assessed with DXA

    Time frame: Pre-Intervention (i.e. 1 to 28 days before the first training session of the exercise intervention) and Post-Intervention (i.e. 1 to 28 days after the last training session of the exercise intervention)

  3. Cardiorespiratory fitness

    VO2max assessed with cardiopulmonary exercise test

    Time frame: Pre-Intervention (i.e. 1 to 28 days before the first training session of the exercise intervention) and Post-Intervention (i.e. 1 to 28 days after the last training session of the exercise intervention)

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Study locations

1 site
  • University of Basel
    Basel, 4052, Switzerland
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References and documents

Individual participant data

Plan to share: Yes — Anonymized data will be provided in a data repository in accordance to FAIR principles

No publications or documents are linked to this record.

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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jun 25, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT06063135
Lead sponsor
University of Basel
Responsible party
Raphael Knaier (Researcher Group leader: Circadian Exercise, University of Basel) — Principal investigator
First posted
Oct 2, 2023
Start date
Nov 21, 2023
Primary completion
Jun 24, 2025
Completion
Jun 24, 2025
Last update
Jun 25, 2025

Study contacts

Raphael Knaier, PhD
principal investigator · University of Basel

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Jun 2025. You cannot join it, but the record below documents what was studied.

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