Identify effective exercise timing for blood sugar control and improvement of circadian rhythm

Identify effective exercise timing to resynchronize circadian rhythms and improve insulin sensitivity

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

CRIS

Registry ID

KCT0011022

Enrollment

Registered

2025-09-12

Start date

2025-11-05

Completion date

Unknown

Last updated

2026-06-01

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

None listed

Interventions

Behavioral : This study applies a one-week cross-over design to compare the effects of morning versus evening exercise in obese men. Both intervention arms perform moderate-intensity aerobic exercise

Eligibility

Sex/Gender

Male

Inclusion criteria

Inclusion criteria: Adult men with a body mass index(BMI) = 25 kg/m²; body weight change within 10% over the past 4 months; classified as level 1 (inactive) according to the International Physical Activity Questionnaire(IPAQ); and those who understand the study purpose and procedures and voluntarily agree to participate.

Exclusion criteria

Exclusion criteria: Individuals who have experienced significant body weight changes (=10%) within the past 4 months; those with walking limitations or a history of orthopedic surgery; those with a history of cardiovascular surgery; those currently receiving insulin therapy; those who consistently skip breakfast; and those who have participated in regular exercise (=2 times per week) within the past 4 months.

Design outcomes

Primary

Measure	Time frame
2-hour glucose AUC 75g OGTT;Continuous glucose-related outcomes (AUC, iAUC, mean, glycemic variability)	—

Secondary

Measure	Time frame
Metabolic flexibility;Circadian phase of core body temperature;2-hour postprandial glucose AUC	—

Countries

Korea, Republic of

Contacts

Public ContactMinjae Seo

Korea University

zzee97@korea.ac.kr+82-2-3290-2315

Outcome results