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Hijleh AA, Wang S, Berton DC, Neder-Serafini I, Vincent S, James M, Domnik N, Phillips D, Nery LE, O'Donnell DE, Neder JA. Reference values for leg effort during incremental cycle ergometry in non-trained healthy men and women, aged 19-85. Scand J Med Sci Sports 2024; 34:e14625. [PMID: 38597357 DOI: 10.1111/sms.14625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 03/19/2024] [Accepted: 03/24/2024] [Indexed: 04/11/2024]
Abstract
Heightened sensation of leg effort contributes importantly to poor exercise tolerance in patient populations. We aim to provide a sex- and age-adjusted frame of reference to judge symptom's normalcy across progressively higher exercise intensities during incremental exercise. Two-hundred and seventy-five non-trained subjects (130 men) aged 19-85 prospectively underwent incremental cycle ergometry. After establishing centiles-based norms for Borg leg effort scores (0-10 category-ratio scale) versus work rate, exponential loss function identified the centile that best quantified the symptom's severity individually. Peak O2 uptake and work rate (% predicted) were used to threshold gradually higher symptom intensity categories. Leg effort-work rate increased as a function of age; women typically reported higher scores at a given age, particularly in the younger groups (p < 0.05). For instance, "heavy" (5) scores at the 95th centile were reported at ~200 W (<40 years) and ~90 W (≥70 years) in men versus ~130 W and ~70 W in women, respectively. The following categories of leg effort severity were associated with progressively lower exercise capacity: ≤50th ("mild"), >50th to <75th ("moderate"), ≥75th to <95th ("severe"), and ≥ 95th ("very severe") (p < 0.05). Although most subjects reporting peak scores <5 were in "mild" range, higher scores were not predictive of the other categories (p > 0.05). This novel frame of reference for 0-10 Borg leg effort, which considers its cumulative burden across increasingly higher exercise intensities, might prove valuable to judging symptom's normalcy, quantifying its severity, and assessing the effects of interventions in clinical populations.
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Affiliation(s)
- Abed A Hijleh
- Respiratory Investigation Unit, Division of Respirology, Department of Medicine, Queen's University, Kingston, Ontario, Canada
| | - Sophia Wang
- Respiratory Investigation Unit, Division of Respirology, Department of Medicine, Queen's University, Kingston, Ontario, Canada
| | - Danilo C Berton
- Pulmonary Function Tests Laboratory, Federal University of Rio Grande to Sul, Porto Alegre, RS, Brazil
| | - Igor Neder-Serafini
- Respiratory Investigation Unit, Division of Respirology, Department of Medicine, Queen's University, Kingston, Ontario, Canada
| | - Sandra Vincent
- Respiratory Investigation Unit, Division of Respirology, Department of Medicine, Queen's University, Kingston, Ontario, Canada
| | - Matthew James
- Respiratory Investigation Unit, Division of Respirology, Department of Medicine, Queen's University, Kingston, Ontario, Canada
| | - Nicolle Domnik
- Respiratory Investigation Unit, Division of Respirology, Department of Medicine, Queen's University, Kingston, Ontario, Canada
| | - Devin Phillips
- School of Kinesiology and Health Science, Faculty of Health, York University, Toronto, Ontario, Canada
| | - Luiz E Nery
- Clinical Exercise Physiology Unit, Division of Pulmonology, Department o Medicine, Federal University of Sao Paulo, São Paulo, Brazil
| | - Denis E O'Donnell
- Respiratory Investigation Unit, Division of Respirology, Department of Medicine, Queen's University, Kingston, Ontario, Canada
| | - J Alberto Neder
- Respiratory Investigation Unit, Division of Respirology, Department of Medicine, Queen's University, Kingston, Ontario, Canada
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Domnik N, Vincent S, MacLeod RJ, Cutz E, Fisher J. Murine Pulmonary Slowly‐Adapting Receptors (SARs): Putative links to Neuroepithelial Body (NEB) hypoxia chemoreception and the Calcium Sensing Receptor (CaSR). FASEB J 2015. [DOI: 10.1096/fasebj.29.1_supplement.686.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Nicolle Domnik
- Biomedical and Molecular Sciences Queen's UniversityKingstonCanada
| | - Sandra Vincent
- Biomedical and Molecular Sciences Queen's UniversityKingstonCanada
| | - R John MacLeod
- Biomedical and Molecular Sciences Queen's UniversityKingstonCanada
- MedicineQueen's UniversityKingstonCanada
| | - Ernest Cutz
- Div. PathologyDept. Paediatric Medicine The Hospital for Sick ChildrenTorontoCanada
- Laboratory Medicine and Pathobiology University of TorontoTorontoCanada
| | - John Fisher
- Biomedical and Molecular Sciences Queen's UniversityKingstonCanada
- MedicineQueen's UniversityKingstonCanada
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Domnik N, Vincent S, Cutz E, Fisher J. Murine airway slowly‐adapting receptor responses to lung inflation: a role for serotonin? (879.19). FASEB J 2014. [DOI: 10.1096/fasebj.28.1_supplement.879.19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Nicolle Domnik
- Biomedical and Molecular Sciences Queen's UniversityKingstonONCanada
| | - Sandra Vincent
- Biomedical and Molecular Sciences Queen's UniversityKingstonONCanada
| | - Ernest Cutz
- Division of PathologyDepartment of Paediatric Laboratory Medicine The Hospital for Sick ChildrenTORONTOONCanada
- Department of Laboratory Medicine and PathobiologyUniversity of TORONTOTorontoONCanada
| | - John Fisher
- Biomedical and Molecular Sciences Queen's UniversityKingstonONCanada
- Department of Medicine Queen's UniversityKingstonONCanada
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Torbey S, Seaborn G, Domnik N, Fisher J, Akl S, Redfearn D. 599 Accurate QRS Detection in the Murine ECG. Can J Cardiol 2012. [DOI: 10.1016/j.cjca.2012.07.537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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