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Completed

NCT Number: NCT01906320

Effects of a High Intensity Resistance Training in Muscular Strength, Agility, and Body Composition of Anorexia Nervosa Restricting Type Patients

The aim is to test the hypothesis that high-resistance training for 8 weeks, following the recommendations for healthy adolescents, is capable of eliciting increases in muscle strength, agility, skeletal muscle mass, and functional capacity without losing weight, body mass index (BMI) or fat mass in anorexia nervosa restricting type patients. Further, we hypothesize that the effects produced by the high-resistance training program will be maintained 4 weeks following the completion of the training program.

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Key information

Conditions

Anorexia Nervosa Restricting Type Anorexia Nervosa Behavior Feeding and Eating Disorders Mental Disorders Motor Activity

Age range

12 year–16 year

Sex eligibility

Female

Study type

Interventional

Phase

Not applicable

Primary location

Universidad Europea, Villaviciosa de Odón, Madrid, Spain

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Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • diagnosed with anorexia nervosa restricting type
  • age ≤16 years
  • receiving psychological therapy 3 days/week, and daily life tracing (including diet)
  • BMI >14.0 kg/m2

Exclusion criteria

  • being excessive exercisers (6 hours per week moderate to vigorous physical activity [1952 counts/min] upon admission)
  • not being able to perform physical activity.

Treatment and study plan

High-intensity resistance training

Behavioral

Intervention group performed 3 weekly sessions during 8 weeks in the intra-hospital gymnasium. Each session lasted 50-60 min, and started and ended with warm-up and cool-down periods (10-15 min).

The core session included bench press, leg press, lateral row, leg extension, lateral pull-down, abdominal crunch, low back extension, and push-ups exercises. The participants performed three sets of 8-10 repetitions with resting periods of 1-2 min on the weightlifting machines. Load was gradually increased 5-10 % as the participant strength was adapted. The load started at 70% of 6RM.

Functional exercises (abdominal crunch, low back extension, and push-ups) were performed at the end of the session to strengthen the core musculature consisting of 3 sets of 15s of isometric contractions at the beginning of the program and 30 s at the end. Dynamic contractions were added, starting with 10 repetitions at the beginning to 30 repetitions at the end of the program.

Primary outcomes

  1. Changes in Muscular Strength

    Time frame: 3 times (week 0, week 8, week 12)

    Muscular strength was assessed in the upper and lower body following a standardized strength testing protocol in the same resistance weight machines used in training sessions. The weightlifting training machines that were specifically built for the body size of children and adolescents (Strive Inc, PA, US) were used to carry out the 6RM (maximum repetitions) measured in Kilograms (kg). The lower body strength was assessed with seated leg-press, and upper body strength was assessed with seated bench press and seated lateral row

  2. Changes in Agility

    Time frame: 3 times (week 0, week 8, week 12)

    To measure agility, we used the Time Up and Go (TUG) 3m and 10 m tests, and the Timed Up and Down Stairs (TUDS). These tests are reliable and validated for healthy children and adolescents, and used with other chronic pathologies such as cancer.

  3. Changes in Body Composition - Anthropometry

    Time frame: 3 times (week 0, week 8, week 12)

    Body composition was obtained by collecting weight (kg) and height (m), and BMI was calculated as kg/m2. To obtain the % Fat Mass Heyward (2004) equation (specific for anorexia nervosa patients) was used. The skeletal muscle mass (SMM) was calculated using Poortmans (2005) equation. Fat Free Mass, and Fat mass where calculated based on Heyward and Poortmas equations.

    Skinfolds, diameters and perimeters where measured following the International Society for the advancement of the Kinanthropometry (ISAK) guidelines.

  4. Functional Capacity

    Time frame: 3 times (week 0, week 8, week 12)

    Functional capacity was assessed by a graded exercise test on a treadmill in conjunction with an ECG response, and under similar environmental conditions. Treadmill speed began at 3.0 km/h with a grade of 5.0%; both were increased by 0.3 km/h and 0.5% respectively every 30s. The test was terminated upon volitional fatigue of the patient or when they showed loss of ability to maintain the required workload.VO2peak was determined as the higher value obtained after a period of 20s. Ventilatory Threshold (VT) was determined using the O2 equivalent (VE∙VO2-1) and O2 end-tidal pressure (PetO2) without increases in the CO2 equivalent (VE∙VCO2-1).

Secondary outcomes

  1. Changes in Spontaneous Physical Activity habits - Accelerometry

    Time frame: 2 times (week 0, week 8)

    Patients were required to maintain their normal physical activity while they were using an uni-axial accelerometer (Actigraph MTI, GT1M model, Manufacturing Technology Inc., Fort Walton Beach, FL, USA). At least 7 days were recorded (Monday-Sunday) with a minimum of 10-hour registration per day was set as an inclusion criterion. The time sampling interval (epoch) was set at 15 seconds. Average physical activity intensity was expressed as (sum of counts registered per epoch)/(Total Time Registered) (cpm). Time spent in light, moderate, vigorous, very vigorous and moderate to vigorous physical activity (MVPA) was presented as means per day depending on the metabolic equivalents (MET). Time spent in low intensity physical activity or sedentary time was the total time registered minus the total time active. Time spent in moderate to vigorous physical activity was presented as means of minutes per day

  2. Changes in perceived health-related QoL

    Time frame: 2 times (week 0, week 8)

    Patients were requested to fill in the SF-36 questionnaire to assess their perceptions in physical and mental health-related QoL

Sponsors and collaborators

Lead sponsor

Universidad Europea de Madrid

Other

Collaborators

  • Hospital Infantil Universitario Niño Jesús, Madrid, Spain

Registry information

Important dates

Study start
2009
Primary completion
2012
Study completion
2013
First posted
Jul 24, 2013
Registry last updated
Dec 30, 2020

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

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This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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