NCT01436318

Brief Summary

Respiratory muscle strength training (RMST) is a potential treatment option that has been shown to increase strength and ventilatory function in critically ill patients, patients on ventilators and patients with mild neuromuscular weakness. Currently researchers are examining the role of inspiratory muscle strength training (IMST) in pressure performance of ventilator dependent children with Pompe disease. However, normal pressure-flow-timing responses of lung function are not well-characterized in healthy children. The purpose of this study is to measure RMST-induced changes in respiratory function in healthy children. Children will undergo one session of lung function and strength testing. By studying healthy children's respiratory function, this study will also help to develop more efficient respiratory muscle training exercise prescriptions for children with neuromuscular weakness and impaired respiratory function.

Trial Health

87
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
7

participants targeted

Target at below P25 for all trials

Timeline
Completed

Started Apr 2011

Typical duration for all trials

Geographic Reach
1 country

1 active site

Status
completed

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Start

First participant enrolled

April 1, 2011

Completed
6 months until next milestone

First Submitted

Initial submission to the registry

September 16, 2011

Completed
3 days until next milestone

First Posted

Study publicly available on registry

September 19, 2011

Completed
2.9 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

August 1, 2014

Completed
1 month until next milestone

Study Completion

Last participant's last visit for all outcomes

September 1, 2014

Completed
Last Updated

September 13, 2018

Status Verified

September 1, 2018

Enrollment Period

3.3 years

First QC Date

September 16, 2011

Last Update Submit

September 12, 2018

Conditions

Respiratory Muscle Strength

Keywords

Healthy KidsRespiratoryVolunteers

Outcome Measures

Primary Outcomes (1)

  • Pulmonary Function Testing

    Subjects will complete tidal flow-volume assessments and forced expiratory maneuvers.

    Day 1

Study Arms (1)

Respiratory Function

Children will undergo one session of pulmonary function and strength testing

Eligibility Criteria

Age4 Years - 16 Years
Sexall
Healthy VolunteersYes
Age GroupsChild (0-17)
Sampling MethodProbability Sample
Study Population

Healthy Children

You may qualify if:

  • Male or female subjects 4-16 years of age.
  • Healthy subjects

You may not qualify if:

  • Have primary pulmonary disease
  • Have primary neuromuscular disease
  • Have a connective tissue or autoimmune disease
  • Have had a respiratory infection with in 15 days prior to study date
  • Have acute aminoglycosides antibiotic therapy with in 15 days prior to study date
  • Have acute corticosteroids with in 15 days prior to study date
  • Have a need to use an inhaler routinely
  • Have hepatic failure
  • Have hematologic failure
  • Have participated in other studies related to medications or exercise
  • Have used tobacco products
  • Have other precautions

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

University of Florida

Gainesville, Florida, 32610, United States

Location

Related Publications (22)

  • American Thoracic Society/European Respiratory Society. ATS/ERS Statement on respiratory muscle testing. Am J Respir Crit Care Med. 2002 Aug 15;166(4):518-624. doi: 10.1164/rccm.166.4.518. No abstract available.

    PMID: 12186831BACKGROUND

  • Ramonatxo M, Amsalem FA, Mercier JG, Jean R, Prefaut CG. Ventilatory control during exercise in children with mild or moderate asthma. Med Sci Sports Exerc. 1989 Feb;21(1):11-7. doi: 10.1249/00005768-198902000-00003.

    PMID: 2494415BACKGROUND

  • Villafranca C, Borzone G, Leiva A, Lisboa C. Effect of inspiratory muscle training with an intermediate load on inspiratory power output in COPD. Eur Respir J. 1998 Jan;11(1):28-33. doi: 10.1183/09031936.98.11010028.

    PMID: 9543266BACKGROUND

  • Tzelepis GE, Vega DL, Cohen ME, Fulambarker AM, Patel KK, McCool FD. Pressure-flow specificity of inspiratory muscle training. J Appl Physiol (1985). 1994 Aug;77(2):795-801. doi: 10.1152/jappl.1994.77.2.795.

    PMID: 8002530BACKGROUND

  • Tzelepis GE, Kasas V, McCool FD. Inspiratory muscle adaptations following pressure or flow training in humans. Eur J Appl Physiol Occup Physiol. 1999 May;79(6):467-71. doi: 10.1007/s004210050538.

    PMID: 10344453BACKGROUND

  • Coast JR, Jensen RA, Cassidy SS, Ramanathan M, Johnson RL Jr. Cardiac output and O2 consumption during inspiratory threshold loaded breathing. J Appl Physiol (1985). 1988 Apr;64(4):1624-8. doi: 10.1152/jappl.1988.64.4.1624.

    PMID: 3378996BACKGROUND

  • Romer LM, McConnell AK. Specificity and reversibility of inspiratory muscle training. Med Sci Sports Exerc. 2003 Feb;35(2):237-44. doi: 10.1249/01.MSS.0000048642.58419.1E.

    PMID: 12569211BACKGROUND

  • Otis AB. Pressure-flow relationships and power output of breathing. Respir Physiol. 1977 Jun;30(1-2):7-14. doi: 10.1016/0034-5687(77)90017-2.

    PMID: 877452BACKGROUND

  • Mognoni P, Saibene F, Sant'Ambrogio G, Agostoni E. Dynamics of the maximal contraction of the respiratory muscles. Respir Physiol. 1968 Mar;4(2):193-202. doi: 10.1016/0034-5687(68)90051-0. No abstract available.

    PMID: 5689337BACKGROUND

  • Read DJ, Freedman S, Kafer ER. Pressures developed by loaded inspiratory muscles in conscious and anesthetized man. J Appl Physiol. 1974 Aug;37(2):207-18. doi: 10.1152/jappl.1974.37.2.207. No abstract available.

    PMID: 4853759BACKGROUND

  • Pengelly LD, Alderson AM, Milic-Emili J. Mechanics of the diaphragm. J Appl Physiol. 1971 Jun;30(6):797-805. doi: 10.1152/jappl.1971.30.6.797. No abstract available.

    PMID: 5580797BACKGROUND

  • Ameredes BT, Zhan WZ, Prakash YS, Vandenboom R, Sieck GC. Power fatigue of the rat diaphragm muscle. J Appl Physiol (1985). 2000 Dec;89(6):2215-9. doi: 10.1152/jappl.2000.89.6.2215.

    PMID: 11090570BACKGROUND

  • Goldman MD, Grassino A, Mead J, Sears TA. Mechanics of the human diaphragm during voluntary contraction: dynamics. J Appl Physiol Respir Environ Exerc Physiol. 1978 Jun;44(6):840-8. doi: 10.1152/jappl.1978.44.6.840.

    PMID: 670007BACKGROUND

  • Fitting JW, Easton PA, Grassino AE. Velocity of shortening of inspiratory muscles and inspiratory flow. J Appl Physiol (1985). 1986 Feb;60(2):670-7. doi: 10.1152/jappl.1986.60.2.670.

    PMID: 3081483BACKGROUND

  • Komarow HD, Myles IA, Uzzaman A, Metcalfe DD. Impulse oscillometry in the evaluation of diseases of the airways in children. Ann Allergy Asthma Immunol. 2011 Mar;106(3):191-9. doi: 10.1016/j.anai.2010.11.011. Epub 2011 Jan 6.

    PMID: 21354020BACKGROUND

  • Younes M, Riddle W. A model for the relation between respiratory neural and mechanical outputs. I. Theory. J Appl Physiol Respir Environ Exerc Physiol. 1981 Oct;51(4):963-78. doi: 10.1152/jappl.1981.51.4.963.

    PMID: 7298440BACKGROUND

  • Parthasarathy S, Jubran A, Laghi F, Tobin MJ. Sternomastoid, rib cage, and expiratory muscle activity during weaning failure. J Appl Physiol (1985). 2007 Jul;103(1):140-7. doi: 10.1152/japplphysiol.00904.2006. Epub 2007 Mar 29.

    PMID: 17395760BACKGROUND

  • Butler JE. Drive to the human respiratory muscles. Respir Physiol Neurobiol. 2007 Nov 15;159(2):115-26. doi: 10.1016/j.resp.2007.06.006. Epub 2007 Jun 17.

    PMID: 17660051BACKGROUND

  • Rowley KL, Mantilla CB, Sieck GC. Respiratory muscle plasticity. Respir Physiol Neurobiol. 2005 Jul 28;147(2-3):235-51. doi: 10.1016/j.resp.2005.03.003.

    PMID: 15871925BACKGROUND

  • Osborne S, Road JD. Diaphragm and phrenic nerve activities during inspiratory loading in anesthetized rabbits. Respir Physiol. 1995 Mar;99(3):321-30. doi: 10.1016/0034-5687(94)00109-d.

    PMID: 7770667BACKGROUND

  • American Thoracic Society; European Respiratory Society. ATS/ERS statement: raised volume forced expirations in infants: guidelines for current practice. Am J Respir Crit Care Med. 2005 Dec 1;172(11):1463-71. doi: 10.1164/rccm.200408-1141ST. No abstract available.

    PMID: 16301301BACKGROUND

  • Polkey MI, Hamnegard CH, Hughes PD, Rafferty GF, Green M, Moxham J. Influence of acute lung volume change on contractile properties of human diaphragm. J Appl Physiol (1985). 1998 Oct;85(4):1322-8. doi: 10.1152/jappl.1998.85.4.1322.

    PMID: 9760323BACKGROUND

Study Officials

  • Barbara K Smith, PT, PhD

    University of Florida

    PRINCIPAL INVESTIGATOR

Study Design

Study Type
observational
Observational Model
ECOLOGIC OR COMMUNITY
Time Perspective
PROSPECTIVE
Sponsor Type
OTHER
Responsible Party
SPONSOR

Study Record Dates

First Submitted

September 16, 2011

First Posted

September 19, 2011

Study Start

April 1, 2011

Primary Completion

August 1, 2014

Study Completion

September 1, 2014

Last Updated

September 13, 2018

Record last verified: 2018-09

Locations

US(1)