Feasibility of the physiological cost index as an outcome measure for the assessment of energy expenditure during walking

2002 ◽  
Vol 83 (12) ◽  
pp. 1777-1782 ◽  
Author(s):  
Maarten J. IJzerman ◽  
Anand V. Nene
Keyword(s):  
Energy Expenditure ◽  
Outcome Measure ◽  
Cost Index ◽  
Physiological Cost

scholarly journals WHICH IS THE BEST WAY TO PERFORM THE PHYSIOLOGICAL COST INDEX IN ACTIVE INDIVIDUALS WITH UNILATERAL TRANS-TIBIAL AMPUTATION?

2019 ◽  
Author(s):  
Stefano Brunelli ◽  
Andrea Sancesario ◽  
Marco Iosa ◽  
Anna Sofia Delussu ◽  
Noemi Gentileschi ◽  
...  
Keyword(s):  
Heart Rate ◽  
Oxygen Consumption ◽  
Energy Expenditure ◽  
Energy Cost ◽  
Limb Amputation ◽  
Alternative Measure ◽  
Cost Index ◽  
Physiological Cost ◽  
Fitness Training ◽  
Energy Cost Of Walking

BACKGROUND: Physiological Cost Index (PCI) is a simple method used to estimate energy expenditure during walking. It is based on a ratio between heart rate and self-selected walking speed. Previous studies reported that PCI is reliable in individuals with lower limb amputation but only if there is an important walking impairment. No previous studies have investigated the correlation of PCI with the Energy Cost Walking (ECW) in active individuals with traumatic unilateral trans-tibial amputation, considering that this particular category of amputees has an ECW quite similar to healthy individual without lower limb amputation. Moreover, it is important to determine if PCI is also correlated to ECW in the treadmill test so as to have an alternative to over-ground test. OBJECTIVES: The aim of this study was to evaluate the correlation between PCI and ECW in active individuals with traumatic trans-tibial amputation in different walking conditions. The secondary aim was to evaluate if this correlation permits to determine ECW from PCI values. METHODOLOGY: Ninety traumatic amputees were enrolled. Metabolic data, heart rate and walking speed for the calculation of ECW and for PCI were computed over-ground and on a treadmill with 0% and 12% slopes during a 6-minute walking test. FINDINGS: There is a significant correlation between ECW and PCI walking over-ground (p=0.003; R2=0.10) and on treadmill with 12% slopes (p=0.001; R2=0.11) but there is only a poor to moderate correlation around the trendline. No significant correlation was found walking on treadmill with 0% slope. The Bland-Altman plot analysis suggests that is not possible to evaluate ECW directly from PCI. CONCLUSIONS: PCI is a reliable alternative measure of energy expenditure during walking in active individuals with trans-tibial amputation when performing over-ground or at high intensity effort on treadmill. PCI is therefore useful only for monitoring a within subject assessment. LAYMAN’S ABSTRACT The knowledge of the energy cost of walking in disabled people is important to improve strategies of rehabilitation or fitness training and to develop new prosthetic and orthotic components. The “gold standard” for the evaluation of the energy cost of walking is the oxygen consumption measurement with a metabolimeter, but the testing procedure is expensive and time consuming, hardly practicable in many rehabilitation centers. The Physiological Cost Index (PCI) is an indirect tool that evaluates the oxygen consumption during walking. PCI considers heart rate during walking, in relation to the speed, as an indicator of energy expenditure. The formula is “walking heart rate – resting heart rate /speed”. PCI is widely used in literature but there is not a solid evidence of a direct correlation between PCI and energy cost of walking. In particular, for individuals with unilateral trans-tibial amputation without comorbidities, no previous studies have been conducted about this correlation. It has to be noticed that individuals with unilateral trans-tibial amputation have an energy cost of walking quite similar to healthy people. Previous studies reported that in healthy people such correlation does not exist. For this reason, the aim of this study was to evaluate if and in which walking condition a linear correlation exists between PCI and Energy Cost Walking in individuals with unilateral trans-tibial amputation. Oxygen consumption measurement with a metabolimeter and PCI were computed over-ground and on a treadmill with 0% and 12% slopes during a 6-minute walking test in 90 participants. We have found that PCI is an alternative measure of energy cost of walking when performing over-ground or with high intensity effort on treadmill (12% slope). These findings could be useful when PCI is used for monitoring a fitness training or for evaluation tests. Article PDF Link: https://jps.library.utoronto.ca/index.php/cpoj/article/view/32953/25717 How to Cite: Brunelli S, Sancesario A, Iosa M, Delussu A.S, Gentileschi N, Bonanni C, Foti C, Traballesi M. Which is the best way to perform the Physiological Cost Index in active individuals with unilateral trans-tibial amputation? Canadian Prosthetics & Orthotics Journal. Volume2, Issue1, No.5, 2019. https://doi.org/10.33137/cpoj.v2i1.32953. CORRESPONDING AUTHOR: Dr. Stefano Brunelli,Fondazione Santa Lucia, IRCCS, Via Ardeatina 306, 00179 Rome, Italy.ORCID: https://orcid.org/0000-0002-5986-1564Tel. +39 0651501844; Fax +39 0651501919E-MAIL: [email protected]

scholarly journals Sharp Turning and Corner Turning: Comparison of Energy Expenditure, Gait Parameters, and Level of Fatigue among Community-Dwelling Elderly

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Maria Justine ◽  
Haidzir Manaf ◽  
Affeenddie Sulaiman ◽  
Shahir Razi ◽  
Hani Asilah Alias
Keyword(s):  
Energy Expenditure ◽  
Postural Control ◽  
Community Dwelling ◽  
Cost Index ◽  
Physiological Cost ◽  
Gait Parameters ◽  
Ct Data ◽  
Corner Turning ◽  
Step Turn

This study compares energy expenditure (EE), gait parameters (GP), and level of fatigue (LOF) between 5-minute walking with sharp turning (ST) and corner turning (CT). Data were obtained from 29 community-dwelling elderly (mean age, 62.7 ± 3.54 years). For 5 minutes, in ST task, participants walked on a 3-meter pathway with 2 cones placed at each end (180° turning), while in CT task, participants walked on a 6-meter pathway with 4 cones placed at 4 corners (90° turning). The physiological cost index, pedometer, and 10-point Modified Borg Dyspnoea Scale were used to measure EE (beats/min), GP (no of steps), and LOF, respectively. Data were analyzed by using independentt-tests. EE during ST (0.62 ± 0.21 beats/min) was significantly higher than CT (0.48 ± 0.17 beats/min) (P<0.05). GP (434 ± 92.93 steps) and LOF (1.40 ± 1.11) in ST were found to be lower compared to GP (463 ± 92.18 steps) and LOF (1.54 ± 1.34) in CT (All,P>0.05). Higher EE in ST could be due to the difficulty in changing to a 180° direction, which may involve agility and different turning strategies (step-turn or pivot-turn) to adjust the posture carefully. In CT, participants could choose a step-turn strategy to change to a 90° direction, which was less challenging to postural control.

scholarly journals Estimation of Physiological Cost Index as an Energy Expenditure Index using MacGregor’s Equation

2015 ◽  
Vol 53 (199) ◽  
pp. 174-179 ◽  
Author(s):  
Binaya SJB Rana ◽  
Matiram Pun
Keyword(s):  
Physical Activity ◽  
Heart Rate ◽  
Energy Expenditure ◽  
Asian Population ◽  
Cost Index ◽  
Walking Test ◽  
Physiological Cost ◽  
Straightforward Method ◽  
Healthy Females ◽  
Expenditure Index

Introduction: Physical activity and energy expenditure can be quantified by measuring heart rate, oxygen uptake and respiratory quotient. The Physiological Cost Index (PCI) proposed by MacGregor is a simple and straightforward method to estimate the energy expenditure index. Here, we aim to estimate the energy expenditure among young Asian population using MacGregor’s equation.  Methods: A total of 50 young randomly selected healthy females performed 50m, 100m and 150m walking test at their self-selected preferred speed. The physiological cost index values for 100 m walk at speeds slower and faster than the preferred speed were also obtained. The physiological cost index during exercise was calculated using MacGregor’s equation considering heart rate and speed of walking over the varying distances.  Results: The PCI values on three different distances are consistent during self selected preferred speed. The PCI estimation on second and third tests for all three distances walked consistently reproducible. However for each distance walked, the first test the PCI was significantly higher than the second and third test values. The PCI values increased significantly when subjects walked either slower (p = 0.02) or faster (p = 0.001) than their normal preferred speed.  Conclusion: The physiological cost index values were similar for varying distances walks. The PCI was the least at the preferred speed of walking and increased when the subjects either walked slower or faster than the preferred speed. The first estimation was higher than subsequent estimations.  Keywords: energy expenditure index; exercise; physiological cost index. | PubMed

scholarly journals A Study to Compare Physiological Cost Index (PCI) of Walking on Treadmill with and without Holding the Hand Rails

2021 ◽  
Vol 6 (4) ◽  
pp. 216-219
Author(s):  
Sweety Shah ◽  
Ravi Solanki
Keyword(s):  
Energy Expenditure ◽  
Treadmill Walking ◽  
Fitness Testing ◽  
Cost Index ◽  
Physiological Cost ◽  
Significant Difference ◽  
Significant Change ◽  
And Training

Treadmill walking is commonly used for fitness testing and training. Purpose of present study was to determine whether holding the front hand rails makes any significant change in energy expenditure during treadmill walking or not. Thirty volunteers (17 male and 13 female) participated in the study. Subjects were asked to walk on treadmill at speed of 1.0 to 6.0 mph with and without holding the front hand rails for 6 minutes. Physiological cost index was measured for two different positions and compared for statistically significant difference. Results showed that there was no significant difference (p > 0.05) in Physiological cost index measured for two different positions. Hence, present study concludes that, holding the front hand rails does not make any significant difference in energy expenditure while walking on treadmill. Keywords: Treadmill walking, Physiological cost index, Hand rail.

Outcome of Orthoses Intervention in the Rheumatoid Foot

2003 ◽  
Vol 24 (6) ◽  
pp. 494-499 ◽  
Author(s):  
Yasemin Kavlak ◽  
Fatma Uygur ◽  
Cengiz Korkmaz ◽  
Nilgün Bek
Keyword(s):  
Rheumatoid Arthritis ◽  
Energy Expenditure ◽  
Stride Length ◽  
Step Length ◽  
Foot Orthoses ◽  
Foot Deformity ◽  
Cost Index ◽  
Physiological Cost ◽  
Significant Difference

This study was carried out to determine the effect of foot orthoses on pain, gait, and energy expenditure in patients with rheumatoid arthritis. Eighteen patients were evaluated for these parameters. Each patient was given a foot insert or shoe modification suitable for his or her foot deformity. Following 3 months of orthosis use, a significant difference was found in regards to pain ( p <.05), step length and stride length ( p <.05), and physiological cost index ( p <.05). The results suggest that foot orthoses are an important feature in the rehabilitation of the rheumatoid foot.

Assessment of Hanging Type Grain Cleaner Drudgery Reducing Tool by Farm Women

2022 ◽  
Vol 58 (1) ◽  
pp. 196-198
Author(s):  
S. P. Tripathi ◽  
G. S. Chundawat ◽  
Shashi Gour ◽  
S. P. S. Somvanshi ◽  
Kinjulck C. Singh
Keyword(s):  
Heart Rate ◽  
Energy Expenditure ◽  
Cost Reduction ◽  
Farm Women ◽  
Traditional Practice ◽  
Physiological Cost ◽  
Conventional Practice ◽  
On Farm ◽  
The Impact ◽  
Cardiac Cost

The study was undertaken to assess ergonomically efficiency of hanging type wheat graincleaner, carried out in adopted villages under On Farm Testing (OFT) and Front LineDemonstration (FLD) program conducted by KVK, Mandsaur (M.P.). Total Fifteen farmwomen were selected to assess the physiological workload to compare the impact ofimproved technology over conventional practice for hanging type grain cleaner. Physiologicalparameters i.e. HR, energy expenditure, cardiac cost reduction and physiological costreduction etc., were measured during operations. The results revealed that hanging typegrain cleaner has proved proficient on time and output parameters. The average cardiaccost of work was decreased by 82.29 per cent while using hanging type grain cleaner forwheat. Drudgery reduction was found 83.96 per cent and it saved time by 89.10 per centwhen compared to traditional practice. The physiological cost of work and energyexpenditure in terms of heart rate were observed to be lower while performing activitieswith hanging type grain cleaner as compared to the traditional practice.

Sign in / Sign up

Export Citation Format

Share Document