Three weeks of respiratory muscle endurance training improve the O2 cost of walking and exercise tolerance in obese adolescents

Hailu K. Alemayehu, Desy Salvadego, Miriam Isola, Gabriella Tringali, Roberta De Micheli, Mara Caccavale, Alessandro Sartorio, Bruno Grassi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Obese adolescents (OB) have an increased O2 cost of exercise, attributable in part to an increased O2 cost of breathing. In a previous work a short (3-week) program of respiratory muscle endurance training (RMET) slightly reduced in OB the O2 cost of high-intensity cycling and improved exercise tolerance. We hypothesized that during treadmill walking the effects of RMET would be more pronounced than those observed during cycling. Sixteen OB (age 16.0 ± 0.8 years; body mass [BM] 127.7 ± 14.2 kg; body mass index 40.7 ± 4.0 kg/m2) underwent to 3-week RMET (n = 8) superimposed to a multidisciplinary BM reduction program, or (CTRL, n = 8) only to the latter. Heart rate (HR) and pulmonary O2 uptake ((Formula presented.) O2) were measured during incremental exercise and 12-min constant work rate (CWR) walking at 60% (moderate-intensity, MOD) and 120% (heavy-intensity, HEAVY) of the gas exchange threshold (GET). The O2 cost of walking (aerobic energy expenditure per unit of covered distance) was calculated as (Formula presented.) O2/velocity. BM decreased (~4–5 kg) both in CTRL and in RMET. (Formula presented.) O2peak and GET were not affected by both interventions; the time to exhaustion increased following RMET. During MOD and HEAVY RMET decreased (Formula presented.) O2, the O2 cost of walking (MOD: 0.130 ± 0.033 mL/kg/m [before] vs. 0.109 ± 0.027 [after], P = 0.03; HEAVY: 0.196 ± 0.031 [before] vs. 0.180 ± 0.025 [after], P = 0.02), HR and rates of perceived exertion; no significant changes were observed in CTRL. In OB a short RMET program lowered the O2 cost of MOD and HEAVY walking and improved exercise tolerance. RMET could represent a useful adjunct in the control of obesity.

Original languageEnglish
Article numbere13888
JournalPhysiological Reports
Volume6
Issue number20
DOIs
Publication statusPublished - Oct 1 2018

Fingerprint

Breathing Exercises
Exercise Tolerance
Walking
Costs and Cost Analysis
Heart Rate
Gases
Exercise
Energy Metabolism
Respiration
Body Mass Index
Obesity
Education
Lung

Keywords

  • O cost of breathing
  • O cost of walking
  • Obesity
  • respiratory muscle endurance training

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)

Cite this

Three weeks of respiratory muscle endurance training improve the O2 cost of walking and exercise tolerance in obese adolescents. / Alemayehu, Hailu K.; Salvadego, Desy; Isola, Miriam; Tringali, Gabriella; De Micheli, Roberta; Caccavale, Mara; Sartorio, Alessandro; Grassi, Bruno.

In: Physiological Reports, Vol. 6, No. 20, e13888, 01.10.2018.

Research output: Contribution to journalArticle

@article{e4d81519c3b448c89aabe4d12932786f,
title = "Three weeks of respiratory muscle endurance training improve the O2 cost of walking and exercise tolerance in obese adolescents",
abstract = "Obese adolescents (OB) have an increased O2 cost of exercise, attributable in part to an increased O2 cost of breathing. In a previous work a short (3-week) program of respiratory muscle endurance training (RMET) slightly reduced in OB the O2 cost of high-intensity cycling and improved exercise tolerance. We hypothesized that during treadmill walking the effects of RMET would be more pronounced than those observed during cycling. Sixteen OB (age 16.0 ± 0.8 years; body mass [BM] 127.7 ± 14.2 kg; body mass index 40.7 ± 4.0 kg/m2) underwent to 3-week RMET (n = 8) superimposed to a multidisciplinary BM reduction program, or (CTRL, n = 8) only to the latter. Heart rate (HR) and pulmonary O2 uptake ((Formula presented.) O2) were measured during incremental exercise and 12-min constant work rate (CWR) walking at 60{\%} (moderate-intensity, MOD) and 120{\%} (heavy-intensity, HEAVY) of the gas exchange threshold (GET). The O2 cost of walking (aerobic energy expenditure per unit of covered distance) was calculated as (Formula presented.) O2/velocity. BM decreased (~4–5 kg) both in CTRL and in RMET. (Formula presented.) O2peak and GET were not affected by both interventions; the time to exhaustion increased following RMET. During MOD and HEAVY RMET decreased (Formula presented.) O2, the O2 cost of walking (MOD: 0.130 ± 0.033 mL/kg/m [before] vs. 0.109 ± 0.027 [after], P = 0.03; HEAVY: 0.196 ± 0.031 [before] vs. 0.180 ± 0.025 [after], P = 0.02), HR and rates of perceived exertion; no significant changes were observed in CTRL. In OB a short RMET program lowered the O2 cost of MOD and HEAVY walking and improved exercise tolerance. RMET could represent a useful adjunct in the control of obesity.",
keywords = "O cost of breathing, O cost of walking, Obesity, respiratory muscle endurance training",
author = "Alemayehu, {Hailu K.} and Desy Salvadego and Miriam Isola and Gabriella Tringali and {De Micheli}, Roberta and Mara Caccavale and Alessandro Sartorio and Bruno Grassi",
year = "2018",
month = "10",
day = "1",
doi = "10.14814/phy2.13888",
language = "English",
volume = "6",
journal = "Physiological Reports",
issn = "2051-817X",
publisher = "John Wiley and Sons Inc.",
number = "20",

}

TY - JOUR

T1 - Three weeks of respiratory muscle endurance training improve the O2 cost of walking and exercise tolerance in obese adolescents

AU - Alemayehu, Hailu K.

AU - Salvadego, Desy

AU - Isola, Miriam

AU - Tringali, Gabriella

AU - De Micheli, Roberta

AU - Caccavale, Mara

AU - Sartorio, Alessandro

AU - Grassi, Bruno

PY - 2018/10/1

Y1 - 2018/10/1

N2 - Obese adolescents (OB) have an increased O2 cost of exercise, attributable in part to an increased O2 cost of breathing. In a previous work a short (3-week) program of respiratory muscle endurance training (RMET) slightly reduced in OB the O2 cost of high-intensity cycling and improved exercise tolerance. We hypothesized that during treadmill walking the effects of RMET would be more pronounced than those observed during cycling. Sixteen OB (age 16.0 ± 0.8 years; body mass [BM] 127.7 ± 14.2 kg; body mass index 40.7 ± 4.0 kg/m2) underwent to 3-week RMET (n = 8) superimposed to a multidisciplinary BM reduction program, or (CTRL, n = 8) only to the latter. Heart rate (HR) and pulmonary O2 uptake ((Formula presented.) O2) were measured during incremental exercise and 12-min constant work rate (CWR) walking at 60% (moderate-intensity, MOD) and 120% (heavy-intensity, HEAVY) of the gas exchange threshold (GET). The O2 cost of walking (aerobic energy expenditure per unit of covered distance) was calculated as (Formula presented.) O2/velocity. BM decreased (~4–5 kg) both in CTRL and in RMET. (Formula presented.) O2peak and GET were not affected by both interventions; the time to exhaustion increased following RMET. During MOD and HEAVY RMET decreased (Formula presented.) O2, the O2 cost of walking (MOD: 0.130 ± 0.033 mL/kg/m [before] vs. 0.109 ± 0.027 [after], P = 0.03; HEAVY: 0.196 ± 0.031 [before] vs. 0.180 ± 0.025 [after], P = 0.02), HR and rates of perceived exertion; no significant changes were observed in CTRL. In OB a short RMET program lowered the O2 cost of MOD and HEAVY walking and improved exercise tolerance. RMET could represent a useful adjunct in the control of obesity.

AB - Obese adolescents (OB) have an increased O2 cost of exercise, attributable in part to an increased O2 cost of breathing. In a previous work a short (3-week) program of respiratory muscle endurance training (RMET) slightly reduced in OB the O2 cost of high-intensity cycling and improved exercise tolerance. We hypothesized that during treadmill walking the effects of RMET would be more pronounced than those observed during cycling. Sixteen OB (age 16.0 ± 0.8 years; body mass [BM] 127.7 ± 14.2 kg; body mass index 40.7 ± 4.0 kg/m2) underwent to 3-week RMET (n = 8) superimposed to a multidisciplinary BM reduction program, or (CTRL, n = 8) only to the latter. Heart rate (HR) and pulmonary O2 uptake ((Formula presented.) O2) were measured during incremental exercise and 12-min constant work rate (CWR) walking at 60% (moderate-intensity, MOD) and 120% (heavy-intensity, HEAVY) of the gas exchange threshold (GET). The O2 cost of walking (aerobic energy expenditure per unit of covered distance) was calculated as (Formula presented.) O2/velocity. BM decreased (~4–5 kg) both in CTRL and in RMET. (Formula presented.) O2peak and GET were not affected by both interventions; the time to exhaustion increased following RMET. During MOD and HEAVY RMET decreased (Formula presented.) O2, the O2 cost of walking (MOD: 0.130 ± 0.033 mL/kg/m [before] vs. 0.109 ± 0.027 [after], P = 0.03; HEAVY: 0.196 ± 0.031 [before] vs. 0.180 ± 0.025 [after], P = 0.02), HR and rates of perceived exertion; no significant changes were observed in CTRL. In OB a short RMET program lowered the O2 cost of MOD and HEAVY walking and improved exercise tolerance. RMET could represent a useful adjunct in the control of obesity.

KW - O cost of breathing

KW - O cost of walking

KW - Obesity

KW - respiratory muscle endurance training

UR - http://www.scopus.com/inward/record.url?scp=85055193602&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85055193602&partnerID=8YFLogxK

U2 - 10.14814/phy2.13888

DO - 10.14814/phy2.13888

M3 - Article

C2 - 30350405

AN - SCOPUS:85055193602

VL - 6

JO - Physiological Reports

JF - Physiological Reports

SN - 2051-817X

IS - 20

M1 - e13888

ER -