The Effects of Yoga Exercises in Overweight and Obese Women

Trial statusNot yet recruiting
Trial phaseNot applicable
Trial typeInterventional
Biological sexFemale
Age18-65
SponsorOndokuz Mayıs University

About this trial

Obesity has been defined by the World Health Organization (WHO) as an abnormal accumulation of fat in the body that negatively affects health and has been reported to be the most significant public health problem of the 21st century. In the late 1990s, WHO described obesity as a "global epidemic." This epidemic and its associated complications cause the death of 2.8 million adults annually. Additionally, obesity imposes a significant financial burden on countries' healthcare and social security systems. Therefore, obesity stands out as an issue that requires urgent preventive measures.

Obesity is associated with various abnormalities in respiratory functions. Changes in respiratory system mechanics due to decreased lung volumes indicate a strong link between obesity and chronic respiratory diseases. Furthermore, obesity is a risk factor for conditions such as hypertension, cardiovascular diseases, and diabetes.

Yoga is known to have numerous positive effects on health and can provide significant benefits, particularly in improving respiratory functions. Yoga is also an important tool for coping with stress, which can positively influence the respiratory system. It has been reported that yoga reduces the impact of stress on respiratory rate, promoting deep breathing and relaxation.

Some studies on the effects of yoga on obesity have not reached significant conclusions. A study comparing the effects of Vinyasa and Hatha yoga on obesity management found that neither type had a significant effect on metabolism. These studies fail to fully explain the mechanism by which yoga affects obesity due to differences in yoga styles and their lack of standardization, variations in practice durations, and the differing characteristics of study populations. Furthermore, studies on obesity and yoga often have short intervention durations (an average of 8 weeks), with most involving 60-90 minute sessions conducted 1-2 times per week.

Since longer-term studies are needed to better understand the relationship between obesity and yoga, this study aims to investigate the effects of yoga exercises on body composition, respiratory parameters, functional level, sleep quality, quality of life, and emotional state in overweight and obese women.

Eligibility criteria

This trial does not accept healthy volunteers

Qualifiers

Age between 18-65 years

Body Mass Index (BMI) ≥ 25

Waist circumference > 88 cm

Waist-to-hip ratio > 0.8

Disqualifiers

Pregnant and breastfeeding mothers

Participants following any diet program for obesity

Individuals with syndromic or endocrine-related obesity

Participants who regularly exercise

Trial design

Design model

Parallel

Treatments tested in this trial

  • yoga exercises

    Behavioral

    The yoga program, based on Hatha yoga content, will be conducted in groups of 10 participants, for 12 weeks, 3 days a week, at the same time each day (12:00-13:00), and will be administered by an experienced physiotherapist (Appendix 4). Before starting the training program, the exercise group will be given a one-week adaptation period, during which the exercises to be performed in three sessions per week will be taught. Participants in the exercise group who miss sessions for various reasons will be given an additional one-week period to make up for missed sessions. Participants who miss more than four sessions will be excluded from the study. Participants were informed in advance about any personal items they might need before each yoga session (such as towels, tissues, etc.) and were advised to bring their own. The yoga sessions were held in the sports hall of the Artvin Çoruh Dormitory, where the required equipment for yoga (e.g., mats, blocks) was provided. The yoga program was

Treatment groups

50 Participants
are divided into 2 treatment groups
Group A: yoga exercise groupExperimental treatment 1 intervention
Group B: control groupNo intervention 0 interventions

Trial outcomes

Primary outcomes

1

Forced Vital Capacity (FVC)

Spirometry is a fundamental test for assessing lung function and is essential for the evaluation and monitoring of respiratory diseases. Spirometry is a physiological test that measures the maximum effort a person can exhale and the maximum volume of air they can exhale. For the evaluation of lung function, a Care Fusion brand spirometry device will be used. Before the test, the patient's gender, age, height, and weight will be recorded in the device. The patient will be seated in a position that facilitates the required maneuvers, and nasal breathing will be prevented by placing a nose clip. After three test measurements with 95% consistency, the best value obtained will be used.

Time frame
From enrollment to the end of treatment at twelve weeks
2

Assessment of Dynamic Balance and Functional Level (Timed Up and Go Test)

The test, originally called the "Timed Up \& Go Test," is frequently used to measure the functional status of the lower extremities. This test also assesses individuals' ability to maintain balance during transfers and walking. In this test, individuals are asked to sit on a standard fourtyfive cm high chair with their feet flat on the ground, then stand up, walk as quickly but safely as possible for three meters, turn around at the marked point three meters away, walk back toward the chair, and sit down again. The time taken between starting and finishing the test is recorded in seconds using a stopwatch. Individuals are asked to repeat the test three times, and the average of the three trials is used for analysis.

Time frame
From enrollment to the end of treatment at twelve weeks"
3

Body Mass Index

Weight (kg): The Tanita BIA scale device will measure the individual's body weight in kilograms. This measurement is essential for calculating other body composition parameters and assessing overall health. Height (cm): A stadiometer with an accuracy of ±0.5 cm will be used to measure the individual's height in centimeters. Accurate height measurement is fundamental for calculating body mass index (BMI) and assessing growth patterns.After completing the measurements, the dietitian will calculate the BMI by dividing weight in kilograms by the square of height in meters. BMI is a widely used indicator to assess whether an individual has a healthy body weight for a given height.

Time frame
From enrollment to the end of treatment at twelve weeks
4

Waist Circumference

Waist circumference will be measured at the midpoint between the lower margin of the last palpable rib and the top of the iliac crest, using a non-stretch tape measure. The individual will stand with feet close together, arms at the sides, and body weight evenly distributed. The measurement will be taken at the end of a normal expiration, ensuring the tape is horizontal and snug but not compressing the skin.

Time frame
From enrollment to the end of treatment at twelve weeks

Secondary outcomes

1

Assessment of Quality of Life (Short Form-36)

In general terms, quality of life is defined as an individual's perception of their situation in life, in the context of their cultural values, expectations, and desires. The Short Form-36 is a generic, broad-scale measurement tool within quality of life scales. It was developed and made available by the RAND Corporation. The reliability and validity of the Turkish version were assessed by Koçyiğit and colleagues. The survey is divided into eight subcategories: social functioning, physical functioning, emotional functioning, physical role limitations, general health status, mental health status, pain, and vitality (energy), and consists of thirty-six questions. Scoring is done on a scale from zero to one hundred, where zero indicates very poor health status and one hundred indicates no health problems.

Time frame
From enrollment to the end of treatment at twelve weeks"
2

Assessment of Sleep Quality (Pittsburgh Sleep Quality Index - PSQI)

The Pittsburgh Sleep Quality Index (PSQI) was developed by Buysse et al. and adapted into Turkish by Ağargün et al. The PSQI is a nineteen-item self-report scale that evaluates sleep quality and disturbances over the past month. It consists of twenty-four questions, nineteen of which are self-report items, while five questions are answered by a bed partner or roommate. The eighteen scored questions of the scale are divided into seven components: subjective sleep quality, sleep latency, sleep duration, habitual sleep efficiency, sleep disturbance, sleep medication use, and daytime dysfunction. Each component is scored on a zero to three scale. The total score of the scale is derived from the sum of the seven components. The total score ranges from zero to twenty-one. A total score greater than five indicates poor sleep quality.

Time frame
From enrollment to the end of treatment at twelve weeks"
3

Assessment of Emotional Status (Beck Depression Inventory (BDI))

The BAI was developed by Aaron Beck. It consists of twenty-one questions related to common anxiety symptoms such as sweating, trembling, fear, and distress, and asks how the individual has felt during the past week, including the current day. The aim is to measure the anxiety levels present in individuals. In this scale, each item has four options, and the scoring ranges from zero to three (zero points for "Not at all"; one point for "Mild level (didn't affect me)"; two points for "Moderate level (it was unpleasant but bearable)"; three points for "Severe level (I had difficulty bearing it)"). The total score obtained from the answers ranges from zero to sixty-three. At the end of the test, the scores are totaled. The categorization is as follows: eight to fifteen points: mild anxiety symptoms; sixteen to twenty-five points: moderate anxiety symptoms; twenty-six to sixty-three points: severe anxiety symptoms. The internal consistency reliability was found to be eighty-six.

Time frame
From enrollment to the end of treatment at twelve weeks"
4

Assessment of Emotional Status (Beck Anxiety Inventory (BAI))

The BAI, developed by Aaron Beck, consists of twenty-one questions assessing common anxiety symptoms such as sweating, trembling, fear, and distress. It evaluates how individuals have felt over the past week, including the current day. Each item has four response options, scored from zero to three. The total score ranges from zero to sixty-three. Anxiety levels are categorized as mild (eight to fifteen), moderate (sixteen to twenty-five), and severe (twenty-six to sixty-three). The reliability coefficient of the scale in Turkey was reported as Cronbach's alpha = 0.92.

Time frame
From enrollment to the end of treatment at twelve weeks"

Other outcomes

Locations

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