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Exercise Snacks and Muscular Fitness in Sedentary Young Women (ES)

2 juli 2026 bijgewerkt door: Ziren Zhao, Chongqing Normal University

Effects of a 75-Minute Weekly Exercise Snack on Muscular Fitness in Sedentary Young Women

This randomized controlled study examined whether exercise snacks could improve skeletal muscle strength and related physical fitness in sedentary female university students. Eligible participants were sedentary women aged 18 to 25 years who were randomly assigned to an exercise snacks group, a regular exercise group, or a control group. The intervention lasted 8 weeks. The exercise snacks group accumulated short bouts of exercise across the day, while the regular exercise group completed more concentrated exercise sessions three times per week. The control group maintained their usual lifestyle. Muscle strength and related physical fitness were assessed before and after the intervention. The study aimed to evaluate the effectiveness, feasibility, and safety of exercise snacks in a university setting.

Studie Overzicht

Toestand

Voltooid

Conditie

Interventie / Behandeling

Gedetailleerde beschrijving

Sedentary behavior is common among university students and may contribute to reduced physical fitness and lower skeletal muscle function. Exercise snacks are short bouts of physical activity performed repeatedly throughout the day and may offer a time-efficient strategy for interrupting prolonged sitting.

This single-center randomized controlled study was conducted at Chongqing Normal University. Sedentary female university students aged 18 to 25 years were screened for eligibility. Participants completed baseline assessments and were randomly allocated to an exercise snacks group, a regular exercise group, or a control group.

The intervention lasted 8 weeks. The exercise snacks group performed short exercise bouts distributed throughout the day, with a total weekly exercise volume of approximately 75 minutes. The regular exercise group performed exercise three times per week, with each session lasting approximately 25 minutes. Both intervention groups received exercise guidance, reminders, adherence monitoring, and ratings of perceived exertion through the Tizhiyun mobile application. The control group maintained their usual study and lifestyle routines without additional study-prescribed exercise.

Primary outcomes included isokinetic muscle strength, surface electromyography, and mid-thigh isometric pull performance. Secondary outcomes included standing long jump, knee push-ups, and bodyweight squats to exhaustion. Outcome assessments were conducted at baseline and after the 8-week intervention. Adherence, perceived exertion, and exercise-related adverse events were recorded during the study period.

Studietype

Ingrijpend

Inschrijving (Werkelijk)

90

Fase

  • Niet toepasbaar

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studie Locaties

  • China
    • Chongqing Municipality
      • Chongqing, Chongqing Municipality, China, 401331
        • Chongqing Normal University

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

  • Volwassen

Accepteert gezonde vrijwilligers

Ja

Beschrijving

Inclusion Criteria:

  • Female university students aged 18 to 25 years.
  • Daily sedentary time of at least 8 hours, assessed using a sedentary behavior questionnaire.
  • No contraindications to exercise based on the Physical Activity Readiness Questionnaire.
  • No regular exercise participation during the previous 3 months.

Exclusion Criteria:

  • Clinical conditions that make participation in exercise inappropriate.
  • Substantial body weight fluctuation during the previous 3 months.
  • Hypertension, cardiovascular or cerebrovascular disease, or use of related medications.

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Primair doel: Ander
  • Toewijzing: Gerandomiseerd
  • Interventioneel model: Parallelle opdracht
  • Masker: Geen (open label)

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Experimenteel: Exercise Snacks Group
Participants received the exercise snacks intervention for 8 weeks. Exercise was accumulated through short bouts distributed across the day, with a total weekly exercise volume of approximately 75 minutes. Participants completed approximately 11 minutes of exercise on weekdays and 10 minutes on weekends. Exercise guidance, reminders, adherence monitoring, and ratings of perceived exertion were provided through the Tizhiyun mobile application.
Gedragsmatig: Exercise Snacks
Participants performed an 8-week exercise snacks program consisting of short bouts of physical activity distributed across the day. The program was performed 7 days per week, with approximately 75 minutes of exercise per week. Participants completed approximately 11 minutes of short exercise on weekdays and 10 minutes on weekends. Exercise guidance, reminders, adherence monitoring, and ratings of perceived exertion were provided through the Tizhiyun mobile application.
Actieve vergelijker: Regular Exercise Group
Participants received a regular exercise intervention for 8 weeks. Exercise was completed three times per week, with each session lasting approximately 25 minutes.
Gedragsmatig: Regular Exercise
Participants performed an 8-week regular exercise program. Exercise sessions were completed three times per week on Monday, Wednesday, and Friday, with each session lasting approximately 25 minutes. Exercise guidance, reminders, adherence monitoring, and ratings of perceived exertion were provided through the Tizhiyun mobile application.
Geen tussenkomst: Usual Lifestyle Control Group
Participants maintained their usual study and lifestyle routines during the 8-week study period and did not receive additional study-prescribed exercise.

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Isokinetic Muscle Strength
Tijdsspanne: Baseline and Week 8
Isokinetic muscle strength was assessed using an isokinetic dynamometer during standardized testing. Change from baseline to post-intervention was evaluated.
Baseline and Week 8
Surface Electromyography Activity
Tijdsspanne: Baseline and Week 8
Surface electromyographic activity was recorded during standardized muscle strength testing to evaluate neuromuscular activation.
Baseline and Week 8
Mid-Thigh Isometric Pull
Tijdsspanne: Baseline and Week 8
Maximal force generated during a standardized mid-thigh isometric pull test was assessed to evaluate whole-body isometric strength.
Baseline and Week 8

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Standing Long Jump
Tijdsspanne: Baseline and Week 8
Standing long jump distance was assessed using a standardized test of lower-body explosive performance.
Baseline and Week 8
Knee Push-Ups
Tijdsspanne: Baseline and Week 8
The number of correctly completed knee push-up repetitions was assessed using a standardized muscular endurance test.
Baseline and Week 8
Bodyweight Squats to Exhaustion
Tijdsspanne: Baseline and Week 8
The number of correctly completed bodyweight squats performed to volitional exhaustion was assessed as an indicator of lower-body muscular endurance.
Baseline and Week 8

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

Chongqing Normal University

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Werkelijk)

20 april 2026

Primaire voltooiing (Werkelijk)

25 juni 2026

Studie voltooiing (Werkelijk)

25 juni 2026

Studieregistratiedata

Eerst ingediend

2 juli 2026

Eerst ingediend dat voldeed aan de QC-criteria

2 juli 2026

Eerst geplaatst (Werkelijk)

9 juli 2026

Updates van studierecords

Laatste update geplaatst (Werkelijk)

9 juli 2026

Laatste update ingediend die voldeed aan QC-criteria

2 juli 2026

Laatst geverifieerd

1 juli 2026

Meer informatie

Termen gerelateerd aan deze studie

Trefwoorden

Aanvullende relevante MeSH-voorwaarden

Andere studie-ID-nummers

  • CSK2026051

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

NEE

Beschrijving IPD-plan

De-identified individual participant data will not be shared outside the research team because the current informed consent and data management plans limit the use of participant data to this study and do not include external data sharing.

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Nee

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

Deze informatie is zonder wijzigingen rechtstreeks van de website clinicaltrials.gov gehaald. Als u verzoeken heeft om uw onderzoeksgegevens te wijzigen, te verwijderen of bij te werken, neem dan contact op met register@clinicaltrials.gov. Zodra er een wijziging wordt doorgevoerd op clinicaltrials.gov, wordt deze ook automatisch bijgewerkt op onze website .

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