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

2. juli 2026 oppdatert av: 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.

Studieoversikt

Status

Fullført

Forhold

Intervensjon / Behandling

Detaljert beskrivelse

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

Intervensjonell

Registrering (Faktiske)

90

Fase

  • Ikke aktuelt

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiesteder

  • Kina
    • Chongqing Municipality
      • Chongqing, Chongqing Municipality, Kina, 401331
        • Chongqing Normal University

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

  • Voksen

Tar imot friske frivillige

Ja

Beskrivelse

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.

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Annen
  • Tildeling: Randomisert
  • Intervensjonsmodell: Parallell tildeling
  • Masking: Ingen (Open Label)

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Eksperimentell: 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.
Atferdsmessig: 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.
Aktiv komparator: 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.
Atferdsmessig: 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.
Ingen inngripen: 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.

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Isokinetic Muscle Strength
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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

Sekundære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Standing Long Jump
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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

Samarbeidspartnere og etterforskere

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Sponsor

Chongqing Normal University

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart (Faktiske)

20. april 2026

Primær fullføring (Faktiske)

25. juni 2026

Studiet fullført (Faktiske)

25. juni 2026

Datoer for studieregistrering

Først innsendt

2. juli 2026

Først innsendt som oppfylte QC-kriteriene

2. juli 2026

Først lagt ut (Faktiske)

9. juli 2026

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

9. juli 2026

Siste oppdatering sendt inn som oppfylte QC-kriteriene

2. juli 2026

Sist bekreftet

1. juli 2026

Mer informasjon

Begreper knyttet til denne studien

Nøkkelord

Ytterligere relevante MeSH-vilkår

Andre studie-ID-numre

  • CSK2026051

Plan for individuelle deltakerdata (IPD)

Planlegger du å dele individuelle deltakerdata (IPD)?

NEI

IPD-planbeskrivelse

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.

Legemiddel- og utstyrsinformasjon, studiedokumenter

Studerer et amerikansk FDA-regulert medikamentprodukt

Nei

Studerer et amerikansk FDA-regulert enhetsprodukt

Nei

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