scholarly journals Physiological Responses and Perceived Exertion During Robot-Assisted and Body Weight–Supported Gait After Stroke

2018 ◽  
Vol 32 (12) ◽  
pp. 1043-1054 ◽  
Author(s):  
Nina Lefeber ◽  
Emma De Keersmaecker ◽  
Stieven Henderix ◽  
Marc Michielsen ◽  
Eric Kerckhofs ◽  
...  
Keyword(s):  
Heart Rate ◽  
Body Weight ◽  
Perceived Exertion ◽  
Minute Ventilation ◽  
Physiological Responses ◽  
Treadmill Walking ◽  
Robot Assisted ◽  
Future Studies ◽  
Weight Support ◽  
Robotic Devices

Introduction. Physiological responses are rarely considered during walking after stroke and if considered, only during a short period (3-6 minutes). The aims of this study were to examine physiological responses during 30-minute robot-assisted and body weight–supported treadmill and overground walking and compare intensities with exercise guidelines. Methods. A total of 14 ambulatory stroke survivors (age: 61 ± 9 years; time after stroke: 2.8 ± 2.8 months) participated in 3 separate randomized walking trials. Patients walked overground, on a treadmill, and in the Lokomat (60% robotic guidance) for 30 minutes at matched speeds (2.0 ± 0.5 km/h) and matched levels of body weight support (BWS; 41% ± 16%). Breath-by-breath gas analysis, heart rate, and perceived exertion were assessed continuously. Results. Net oxygen consumption, net carbon dioxide production, net heart rate, and net minute ventilation were about half as high during robot-assisted gait as during body weight–supported treadmill and overground walking ( P < .05). Net minute ventilation, net breathing frequency, and net perceived exertion significantly increased between 6 and 30 minutes (respectively, 1.8 L/min, 2 breaths/min, and 3.8 units). During Lokomat walking, exercise intensity was significantly below exercise recommendations; during body weight–supported overground and treadmill walking, minimum thresholds were reached (except for percentage of heart rate reserve during treadmill walking). Conclusion. In ambulatory stroke survivors, the oxygen and cardiorespiratory demand during robot-assisted gait at constant workload are considerably lower than during overground and treadmill walking at matched speeds and levels of body weight support. Future studies should examine how robotic devices can be Future studies should examine how robotic devices can be exploited to induce aerobic exercise.

The Effects of Caffeine in Women during Aerobic-Dance Bench Stepping

2007 ◽  
Vol 17 (1) ◽  
pp. 27-34 ◽  
Author(s):  
Jennifer N. Ahrens ◽  
Lisa K. Lloyd ◽  
Sylvia H. Crixell ◽  
John L. Walker
Keyword(s):  
Heart Rate ◽  
Perceived Exertion ◽  
Minute Ventilation ◽  
Physiological Responses ◽  
Rating Of Perceived Exertion ◽  
Caffeine Ingestion ◽  
Fitness Level ◽  
Aerobic Dance ◽  
Control Body ◽  
And Control

People of all ages and fitness levels participate regularly in aerobic-dance bench stepping (ADBS) to increase fitness and control body weight. Any reasonable method for enhancing the experience or effectiveness of ADBS would be beneficial. This study examined the acute effects of a single dose of caffeine on physiological responses during ADBS in women. When compared with a placebo, neither a 3- nor a 6-mg/kg dose of caffeine altered physiological responses or rating of perceived exertion (RPE) in 20 women (age 19–28 y) of average fitness level, not habituated to caffeine, while they performed an ADBS routine. Since neither dose of caffeine had any effect on VO2, Vco2, minute ventilation, respiratory-exchange ratio, rate of energy expenditure, heart rate, or RPE during ADBS exercise, it would not be prudent for a group exercise leader to recommend caffeine to increase energy cost or decrease perception of effort in an ADBS session. Furthermore, caffeine ingestion should not interfere with monitoring intensity using heart rate or RPE during ADBS.

Physiological responses and perceived exertion during robot-assisted treadmill walking in non-ambulatory stroke survivors

2019 ◽  
pp. 1-9 ◽  
Author(s):  
Nina Lefeber ◽  
Emma De Keersmaecker ◽  
Stieven Henderix ◽  
Marc Michielsen ◽  
Federica Tamburella ◽  
...  
Keyword(s):  
Perceived Exertion ◽  
Physiological Responses ◽  
Treadmill Walking ◽  
Stroke Survivors ◽  
Robot Assisted

scholarly journals Effect of Uphill Running on VO2, Heart Rate and Lactate Accumulation on Lower Body Positive Pressure Treadmills

Sports ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 51
Author(s):  
Daniel Fleckenstein ◽  
Olaf Ueberschär ◽  
Jan C. Wüstenfeld ◽  
Peter Rüdrich ◽  
Bernd Wolfarth
Keyword(s):  
Heart Rate ◽  
Body Weight ◽  
Body Weight Support ◽  
Positive Pressure ◽  
Lower Body ◽  
Lactate Accumulation ◽  
Biomechanical Stress ◽  
Lower Body Positive Pressure ◽  
Weight Support ◽  
Body Positive

Lower body positive pressure treadmills (LBPPTs) as a strategy to reduce musculoskeletal load are becoming more common as part of sports conditioning, although the requisite physiological parameters are unclear. To elucidate their role, ten well-trained runners (30.2 ± 3.4 years; VO2max: 60.3 ± 4.2 mL kg−1 min−1) ran at 70% of their individual velocity at VO2max (vVO2max) on a LBPPT at 80% body weight support (80% BWSet) and 90% body weight support (90% BWSet), at 0%, 2% and 7% incline. Oxygen consumption (VO2), heart rate (HR) and blood lactate accumulation (LA) were monitored. It was found that an increase in incline led to increased VO2 values of 6.8 ± 0.8 mL kg−1 min−1 (0% vs. 7%, p < 0.001) and 5.4 ± 0.8 mL kg−1 min−1 (2% vs. 7%, p < 0.001). Between 80% BWSet and 90% BWSet, there were VO2 differences of 3.3 ± 0.2 mL kg−1 min−1 (p < 0.001). HR increased with incline by 12 ± 2 bpm (0% vs. 7%, p < 0.05) and 10 ± 2 bpm (2% vs. 7%, p < 0.05). From 80% BWSet to 90% BWSet, HR increases of 6 ± 1 bpm (p < 0.001) were observed. Additionally, LA values showed differences of 0.10 ± 0.02 mmol l−1 between 80% BWSet and 90% BWSet. Those results suggest that on a LBPPT, a 2% incline (at 70% vVO2max) is not yet sufficient to produce significant physiological changes in VO2, HR and LA—as opposed to running on conventional treadmills, where significant changes are measured. However, a 7% incline increases VO2 and HR significantly. Bringing together physiological and biomechanical factors from previous studies into this practical context, it appears that a 7% incline (at 80% BWSet) may be used to keep VO2 and HR load unchanged as compared to unsupported running, while biomechanical stress is substantially reduced.

A Pilot Study Comparing Physiological Responses of Phase III Cardiac Patients to Recumbent and Upright Exercise Using the RPE Scale

2005 ◽  
Vol 100 (2) ◽  
pp. 357-361 ◽  
Author(s):  
Meir Magal ◽  
Robert F. Zoeller
Keyword(s):  
Heart Rate ◽  
Pilot Study ◽  
Cardiac Rehabilitation ◽  
Perceived Exertion ◽  
Physiological Responses ◽  
Cardiac Patients ◽  
Phase Iii ◽  
Ratings Of Perceived Exertion ◽  
Physiological Differences ◽  
Stepping Exercise

Ratings of perceived exertion (RPE) are used for exercise programming of cardiac rehabilitation patients, whenever it is difficult to use heart rate to set intensity due to medication or other factors. This investigation examined the physiological responses to two stepping exercise modes (upright and recumbent) at the same RPE. Analysis indicated significant physiological differences between the modes of exercise which may be mediated by postural differences. Specifically, the physiological responses to the recumbent exercise, but not the upright exercise, had the expected relationship with RPE, with recumbent stepping requiring less physiological effort than the upright stepping at the same RPE. As such, we cannot recommend with confidence that the prescription for upright exercise be made based on data from recumbent exercise or vice-versa.

Body weight support during robot-assisted walking: Influence on the trunk and pelvis kinematics

2015 ◽  
Vol 36 (1) ◽  
pp. 81-91
Author(s):  
Eva Swinnen ◽  
Jean-Pierre Baeyens ◽  
Gerrit Hens ◽  
Kristel Knaepen ◽  
David Beckwée ◽  
...  
Keyword(s):  
Body Weight ◽  
Body Weight Support ◽  
Robot Assisted ◽  
Weight Support

scholarly journals Effects of a Wearable Carriage Aid on Whole-Body Physiological Measures and Balance

2020 ◽  
Vol 10 (22) ◽  
pp. 8076
Author(s):  
Saad A. Alabdulkarim ◽  
Abdulsalam M. Farhan ◽  
Mohamed Z. Ramadan
Keyword(s):  
Heart Rate ◽  
Oxygen Consumption ◽  
Minute Ventilation ◽  
Aid Effectiveness ◽  
Whole Body ◽  
Physiological Measures ◽  
Future Studies ◽  
Lower Back ◽  
The Impact ◽  
Load Mass

Carriage tasks are common and can lead to shoulder and lower back injuries. Wearable carriage aids have shown mixed effects on local physical demand measures. This study examined the impact of a wearable carriage aid on whole-body physiological measures (normalized oxygen consumption, minute ventilation, respiratory rate, and heart rate) to obtain a more comprehensive assessment regarding aid effectiveness. Additionally, this study investigated the effect of wearing the device on perceived balance. The potential moderating effect of carried load mass was considered. The examination was conducted while walking on a treadmill at a constant speed (2 km/h) for 5 min and was completed by 16 participants. Wearing the device reduced normalized oxygen consumption (~14%), minute ventilation (~7%), and heart rate (~3%), while substantially improving perceived balance (~61%). These effects were consistent across examined carried load levels. Although this study highlighted the potential for the developed aid, future studies are required for more diverse and realistic testing conditions.

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