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Effects of Yoga on Objective and Self-reported Health Indicators Among Female and Male Individuals

This study has been completed.
Sponsor:
ClinicalTrials.gov Identifier:
NCT01305096
First Posted: February 28, 2011
Last Update Posted: October 24, 2014
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Collaborators:
Stockholm County Council, Sweden
Stockholm University
Information provided by (Responsible Party):
Per Wandell, Karolinska Institutet
  Purpose
The purpose of this study is to determine whether inversions (specific yoga postures in which the heart is higher than the head) and other dynamic and static yoga postures affect heart rate variability, oxygen uptake, blood pressure, blood parameters and other objective measures of health, and a variety of subjective and objective measures of health in female and male individuals in Sweden.

Condition Intervention
Stress, Psychological, Physiological Other: Yoga intervention

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)
Primary Purpose: Prevention
Official Title: Effects of Yoga on Objective and Self-reported Health Indicators Among Female and Male Individuals

Resource links provided by NLM:


Further study details as provided by Per Wandell, Karolinska Institutet:

Primary Outcome Measures:
  • Change in heart rate variability [ Time Frame: Baseline and at the end of the 8-week intervention ]
    We will measure the change in this variable over time. The first measurement will be at baseline and the second at the end of the 8-week intervention (main measurement). If and only if there are effects after the 8-week intervention, we will follow up the participants at various intervals to determine how long the effects are sustained. These follow-ups will be conducted 3 months, 6 months, and 12 months after the end of the intervention.

  • Change in oxygen uptake [ Time Frame: Baseline and at the end of the 8 week intervention ]
    We will measure the change in this variable over time. The first measurement will be at baseline and the second at the end of the 8-week intervention (main measurement). If and only if there are effects after the 8-week intervention, we will follow up the participants at various intervals to determine how long the effects are sustained. These follow-ups will be conducted 3 months, 6 months, and 12 months after the end of the intervention.


Secondary Outcome Measures:
  • Change in anthropometric variables [ Time Frame: Baseline and at the end of the 8-week intervention ]
    Anthropometric variables include height, weight, waist-to-hip ratio, and body mass index(BMI). We will measure the change in these variables over time. The first measurement will be at baseline and the second at the end of the 8-week intervention (main measurement). If and only if there are effects after the 8-week intervention, we will follow up the participants at various intervals to determine how long the effects are sustained. These follow-ups will be conducted 3 months, 6 months, and 12 months after the end of the intervention.

  • Change in common symptoms in general practice [ Time Frame: Baseline and at the end of the 8-week intervention ]
    We will use the Common Symptoms in General Practice Index to measure how often over the past four weeks participants have experienced the fifteen most common health-related symptoms and complaints. The first measurement will be at baseline and the second at the end of the 8-week intervention (main measurement). If and only if there are effects after the 8-week intervention, we will follow up the participants at various intervals to determine how long the effects are sustained. These follow-ups will be conducted 3 months, 6 months, and 12 months after the end of the intervention.

  • Change in level of sleepiness and measures of recovery or recuperation after sleep [ Time Frame: Baseline and at the end of the 8-week intervention ]
    The Karolinska Sleepiness Scale will be used to measure this outcome variable. This scale measures degree of wakefulness at bedtime and after waking in the morning. The first measurement will be at baseline and the second at the end of the 8-week intervention (main measurement). If and only if there are effects after the 8-week intervention, we will follow up the participants at various intervals to determine how long the effects are sustained. These follow-ups will be conducted 3 months, 6 months, and 12 months after the end of the intervention.

  • Change in blood pressure [ Time Frame: Baseline and at the end of the 8-week intervention ]
    We will measure the change in this variable over time. The first measurement will be at baseline and the second at the end of the 8-week intervention (main measurement). If and only if there are effects at the end of the 8-week intervention, we will follow up the participants at various intervals to determine how long the effects are sustained. These follow-ups will be conducted 3 months, 6 months, and 12 months after the end of the intervention.

  • Change in hand grip strength [ Time Frame: Baseline and at the end of the 8-week intervention ]
    We will measure the change in this variable over time. The first measurement will be at baseline and the second at the end of the 8-week intervention (main measurement). If and only if there are effects after the 8-week intervention, we will follow up the participants at various intervals to determine how long the effects are sustained. These follow-ups will be conducted 3 months, 6 months, and 12 months after the end of the intervention.

  • Change in measures of relaxation and recovery [ Time Frame: Baseline and at the end of the 8-week intervention ]
    We will measure the change in these variables over time. The first measurement will be at baseline and the second at the end of the 8-week intervention (main measurement). If and only if there are effects after the 8-week intervention, we will follow up the participants at various intervals to determine how long the effects are sustained. These follow-ups will be conducted 3 months, 6 months, and 12 months after the end of the intervention.

  • Change in perceived stress [ Time Frame: Baseline and at the end of the 8-week intervention ]
    The Perceived Stress Scale will be used to measure this variable. The first measurement will be at baseline and the second at the end of the 8-week intervention (main measurement). If and only if there are effects after the 8-week intervention, we will follow up the participants at various intervals to determine how long the effects are sustained. These follow-ups will be conducted 3 months, 6 months, and 12 months after the end of the intervention.

  • Change in self-rated health [ Time Frame: Baseline and at the end of the 8-week intervention ]
    We will measure the change in this variable over time. The first measurement will be at baseline and the second at the end of the 8-week intervention (main measurement). If and only if there are effects after the 8-week intervention, we will follow up the participants at various intervals to determine how long the effects are sustained. These follow-ups will be conducted 3 months, 6 months, and 12 months after the end of the intervention.

  • Change in rating of perceived exertion [ Time Frame: Baseline and at the end of the 8-week intervention ]
    We will measure the change in this variable over time. The first measurement will be at baseline and the second at the end of the 8-week intervention (main measurement). If and only if there are effects after the 8-week intervention, we will follow up the participants at various intervals to determine how long the effects are sustained. These follow-ups will be conducted 3 months, 6 months, and 12 months after the end of the intervention.

  • Change in satisfaction with life [ Time Frame: Baseline and at the end of the 8-week intervention ]
    This variable will be measured with the Satisfaction With Life Scale. The first measurement will be at baseline and the second at the end of the 8-week intervention (main measurement). If and only if there are effects after the 8-week intervention, we will follow up the participants at various intervals to determine how long the effects are sustained. These follow-ups will be conducted 3 months, 6 months, and 12 months after the end of the intervention.

  • Change in level of work-family conflict [ Time Frame: Baseline and at the end of the 8-week intervention ]
    This variable will be measured with the Work-Family Conflict Scale. The first measurement will be at baseline and the second at the end of the 8-week intervention (main measurement). If and only if there are effects after the 8-week intervention, we will follow up the participants at various intervals to determine how long the effects are sustained. These follow-ups will be conducted 3 months, 6 months, and 12 months after the end of the intervention.

  • Change in HbA1C [ Time Frame: Baseline and at the end of the 8-week intervention ]
    We will measure the change in this variable over time. The first measurement will be at baseline and the second at the end of the 8-week intervention (main measurement). If and only if there are effects after the 8-week intervention, we will follow up the participants at various intervals to determine how long the effects are sustained. These follow-ups will be conducted 3 months, 6 months, and 12 months after the end of the intervention.

  • Change in Apolipoproteins [ Time Frame: Baseline and after the 8-week intervention ]
    We will measure the change in this variable over time. The first measurement will be at baseline and the second at the end of the 8-week intervention (main measurement). If and only if there are effects after the 8-week intervention, we will follow up the participants at various intervals to determine how long the effects are sustained. These follow-ups will be conducted 3 months, 6 months, and 12 months after the end of the intervention.

  • Change in Adiponectin/Leptin ratio [ Time Frame: Baseline and at the end of the 8-week intervention ]
    We will measure the change in this variable over time. The first measurement will be at baseline and the second at the end of the 8-week intervention (main measurement). If and only if there are effects after the 8-week intervention, we will follow up the participants at various intervals to determine how long the effects are sustained. These follow-ups will be conducted 3 months, 6 months, and 12 months after the end of the intervention.


Enrollment: 44
Study Start Date: March 2011
Study Completion Date: October 2014
Primary Completion Date: October 2014 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Yoga group
Participants in this group will take part in six to eight weeks of yoga classes. The classes will be held once a week and each class will be approximately one hour long. The classes will consist of yoga inversions, sun salutations and other yoga postures with deep breathing.
Other: Yoga intervention
6 weeks of yoga postures, once a week for 60 minutes in a group session with a yoga teacher.
No Intervention: Control group
Matched control

Detailed Description:

This randomized, controlled trial involving 44 male and females in Sweden will investigate whether yoga inversions and semi-inversions and other dynamic and static yoga postures will affect the following variables: heart rate variability, oxygen uptake, anthropometric variables, common symptoms in general practice, sleepiness, sleep quality and recovery/recuperation after sleep, blood pressure, blood lipids, blood proteins, blood sugar, salivary cortisol, hand grip strength, relaxation and recovery perceived stress, self-rated health, rating of perceived exertion, satisfaction with life, and work-family conflict.

Participants will be divided into an intervention group and a passive control group. The intervention group will participate in six to ten weeks of yoga classes. The classes will be held 1-2 times a week for approximately one hour each and will include yoga poses and breathing techniques. The control group will not participate in any intervention but will conduct their lives as usual.

The variables will be assessed at baseline; at the end of the intervention; and three, six, and twelve months after the end of the intervention.

  Eligibility

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.


Ages Eligible for Study:   20 Years to 40 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Aged 20-40 years old

Exclusion Criteria:

  • Aged 40 or more years
  • Takes medication for high blood pressure or other strong medication
  • Recently had an operation
  • Diagnosed with eye disease (e.g., glaucoma)
  • Diagnosed with depression or burnout syndrome
  • Diagnosed with serious back or neck problems
  • Participates in intense physical activity more than once a week
  • Has digestive problems such as acid reflux
  • Serious disorder that affects the ability to do the yoga postures
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01305096


Locations
Sweden
Karolinska Institute
Stockholm, Sweden
Sponsors and Collaborators
Karolinska Institutet
Stockholm County Council, Sweden
Stockholm University
Investigators
Study Chair: Per Wändell, MD, PhD, Professor Karolinska Institutet
Study Chair: Petra Lindfors, PhD, Professor Stockholm University
Study Chair: Malin Nygren, PhD Karolinska Institutet
Study Chair: Lennart Gullstrand, PhD Riksidrottsförbundet
  More Information

Responsible Party: Per Wandell, Professor, Karolinska Institutet
ClinicalTrials.gov Identifier: NCT01305096     History of Changes
Other Study ID Numbers: 2011/248-31/1
First Submitted: February 25, 2011
First Posted: February 28, 2011
Last Update Posted: October 24, 2014
Last Verified: October 2014

Keywords provided by Per Wandell, Karolinska Institutet:
heart rate variability
oxygen uptake
heart rate recovery
perceived stress
sleep
blood pressure
body mass index
body weight
hand grip strength
sleep quality
subjective health complaints
blood lipids
salivary cortisol
blood sugar
HbA1C
Adiponectin
Leptin
Adipolipoproteins
blood proteins
cytokines
insomnia
sleeplessness
yoga

Additional relevant MeSH terms:
Stress, Psychological
Behavioral Symptoms