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Yoga-Based Breathing Exercises in a Salt-Cave Environment Versus a Standard Clinical Setting in Smokers (SPELEO-SMOKERS)

27 juli 2026 uppdaterad av: SEFA HAKTAN HATIK, Sinop University

Yoga-Based Breathing Exercises Performed in a Salt-Cave Environment Versus a Standard Clinical Setting in Smokers: A Randomized Controlled Trial

This randomized controlled trial evaluated whether performing the same yoga-based breathing exercise program in a salt-cave environment produced different respiratory, functional, physical activity, and quality-of-life outcomes compared with the same program performed in a standard clinical setting in adult smokers. Sixty adult smokers were randomized to either a salt-cave group or a control group. Both groups received a physiotherapist-supervised yoga-based breathing exercise program for 6 weeks, twice weekly, in 50-minute sessions. The intervention content, frequency, duration, and physiotherapist supervision were identical in both groups; the only planned between-group difference was the intervention setting. Spirometric outcomes were assessed at baseline, week 3, and week 6. Functional exercise capacity, physical activity, and quality of life were assessed at baseline and week 6.

Studieöversikt

Detaljerad beskrivning

Eligible participants were adult daily smokers aged 18 to 65 years who had smoked for at least the previous 12 months. After baseline assessments, participants were randomized in a 1:1 ratio to the salt-cave group or the standard clinical setting group. Allocation was generated by an independent researcher and concealed using sequentially numbered, opaque, sealed envelopes. Both groups completed the same 6-week yoga-based breathing exercise program, delivered twice weekly under physiotherapist supervision. Each standardized session lasted approximately 50 minutes and included preparatory breathing control, diaphragmatic breathing, Suusi breathing, Kapalabhati, Ujjayi, Anuloma-Viloma/Nadi Shodhana, Bhastrika, Bhramari, Agni Sar, and relaxation. The salt-cave group received the program at the Tuzluca Salt Therapy Center, whereas the control group received the program in a standard private clinical setting. Spirometric parameters included forced expiratory volume in 1 second (FEV1), forced vital capacity (FVC), peak expiratory flow (PEF), and the FEV1/FVC ratio. Secondary assessments included the 6-minute walk test, the International Physical Activity Questionnaire-Short Form, and the World Health Organization Quality of Life-BREF. Participant and provider blinding was not feasible because the settings were visibly different. Statistical analysis was conducted using coded group labels.

Studietyp

Interventionell

Inskrivning (Faktisk)

60

Fas

  • Inte tillämpbar

Kontakter och platser

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Studieorter

      • Iğdır, Turkiet (Türkiye), 76900
        • Tuzluca Rock Salt Mine Salt Therapy Center

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

  • Vuxen
  • Äldre vuxen

Tar emot friska volontärer

Ja

Beskrivning

Inclusion Criteria:

  • Adults aged 18 to 65 years
  • Voluntary participation and written informed consent
  • Ability to ambulate and cooperate with assessments
  • Literacy
  • Daily smoking for at least the previous 12 months
  • Body mass index below 30 kg/m²

Exclusion Criteria:

  • Adults aged 18 to 65 years
  • Voluntary participation and written informed consent
  • Ability to ambulate and cooperate with assessments
  • Literacy
  • Daily smoking for at least the previous 12 months
  • Body mass index below 30 kg/m²

Withdrawal Criteria

  • Participant request to discontinue
  • Pregnancy or suspected pregnancy
  • Occurrence of a sports-related injury during assessments

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

  • Primärt syfte: Behandling
  • Tilldelning: Randomiserad
  • Interventionsmodell: Parallellt uppdrag
  • Maskning: Ingen (Open Label)

Vapen och interventioner

Deltagargrupp / Arm
Intervention / Behandling
Experimentell: Salt-Cave Yoga-Based Breathing Exercise Group
Participants completed the physiotherapist-supervised yoga-based breathing exercise program at the Tuzluca Salt Therapy Center for 6 weeks, twice weekly. The program content, session duration, frequency, and supervision were identical to those of the comparator group; the planned between-group difference was the intervention setting.
Participants received a physiotherapist-supervised yoga-based breathing exercise program at the Tuzluca Salt Therapy Center. The intervention lasted 6 weeks and included two sessions per week, for a total of 12 sessions. Each standardized session lasted approximately 50 minutes and included preparatory breathing control, diaphragmatic breathing, Suusi breathing, Kapalabhati, Ujjayi, Anuloma-Viloma/Nadi Shodhana, Bhastrika, Bhramari, Agni Sar, and relaxation. The exercise content, session frequency, duration, and physiotherapist supervision were identical to those provided in the standard clinical setting group; the planned difference was the intervention setting.
Aktiv komparator: Standard Clinical Setting Yoga-Based Breathing Exercise Group
Participants completed the same physiotherapist-supervised yoga-based breathing exercise program at the Iğdır Fizyodinamik Wellness Center for 6 weeks, twice weekly. The program content, session duration, frequency, and supervision were identical to those of the experimental group.
Participants received the same physiotherapist-supervised yoga-based breathing exercise program in a standard clinical setting at the Iğdır Fizyodinamik Wellness Center. The intervention lasted 6 weeks and included two sessions per week, for a total of 12 sessions. Each standardized session lasted approximately 50 minutes and included preparatory breathing control, diaphragmatic breathing, Suusi breathing, Kapalabhati, Ujjayi, Anuloma-Viloma/Nadi Shodhana, Bhastrika, Bhramari, Agni Sar, and relaxation. The exercise content, session frequency, duration, and physiotherapist supervision were identical to those provided in the salt-cave group.

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Change in Forced Expiratory Volume in 1 Second (FEV1) From Baseline to Week 6
Tidsram: Baseline, week 3, and week 6; primary endpoint at week 6
FEV1 was measured in liters using pre-bronchodilator spirometry. Participants performed three forced expiratory maneuvers under standardized instruction, and the best acceptable value was recorded. The primary comparison was the between-group difference in change from baseline to week 6. An interim measurement was also obtained at week 3
Baseline, week 3, and week 6; primary endpoint at week 6

Sekundära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Change in Forced Vital Capacity (FVC) From Baseline to Week 6
Tidsram: Baseline, week 3, and week 6
FVC in liters, measured by pre-bronchodilator spirometry; baseline, week 3, and week 6.
Baseline, week 3, and week 6
Change in Peak Expiratory Flow (PEF) From Baseline to Week 6
Tidsram: Baseline, week 3, and week 6
PEF in L/s, measured by pre-bronchodilator spirometry; baseline, week 3, and week 6.
Baseline, week 3, and week 6
Change in FEV1/FVC Ratio From Baseline to Week 6
Tidsram: Baseline, week 3, and week 6
FEV1/FVC expressed as a percentage; baseline, week 3, and week 6.
Baseline, week 3, and week 6
Change in 6-Minute Walk Distance From Baseline to Week 6
Tidsram: Baseline and week 6
Distance walked in meters during the 6-minute walk test. Two tests were administered and the longest distance was used; baseline and week 6.
Baseline and week 6
Change in Physical Activity Assessed by IPAQ-SF From Baseline to Week 6
Tidsram: Baseline and week 6
Total physical activity expressed as MET-min/week using the standard IPAQ-SF scoring protocol; baseline and week 6.
Baseline and week 6
Change in WHOQOL-BREF Scores From Baseline to Week 6
Tidsram: Baseline and week 6
Changes in General Health, Physical Health, Psychological, Social Relationships, and Environment scores; baseline and week 6.
Baseline and week 6
Participants With Intervention-Related Adverse Events
Tidsram: 6-week study period
Number of participants experiencing intervention-related or spirometry-related adverse events during the 6-week study period.
6-week study period

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Publikationer och användbara länkar

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Studieavstämningsdatum

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Studera stora datum

Studiestart (Faktisk)

1 december 2022

Primärt slutförande (Faktisk)

20 februari 2023

Avslutad studie (Faktisk)

28 februari 2023

Studieregistreringsdatum

Först inskickad

27 juli 2026

Först inskickad som uppfyllde QC-kriterierna

27 juli 2026

Första postat (Faktisk)

30 juli 2026

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)

30 juli 2026

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

27 juli 2026

Senast verifierad

1 juli 2026

Mer information

Termer relaterade till denna studie

Plan för individuella deltagardata (IPD)

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IPD-planbeskrivning

Individual participant data will not be shared with external researchers.

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