scholarly journals Effects of respiratory muscle endurance training on cerebral oxygenation and hemodynamics, and effort perceptions during maximal exercise

2020 ◽  
Author(s):  
◽  
Johnna Somerville
Keyword(s):  
Endurance Training ◽  
Respiratory Muscle ◽  
Perceived Exertion ◽  
Near Infrared ◽  
Maximal Exercise ◽  
Cerebral Oxygenation ◽  
Primary Objective ◽  
Muscle Endurance ◽  
Time To Exhaustion ◽  
Respiratory Muscle Endurance

The primary objective of this study was to investigate the effects of a 4-week respiratory muscle endurance training (eRMT) program on the physiological and psychological aspects of central fatigue using, respectively, near-infrared spectroscopy (NIRS) and quantification of effort perceptions during maximal exercise. A secondary objective was to assess any impact of eRMT on respiratory health and exercise performance. This study compared pre- and post-eRMT data from the same group of healthy adults. The results indicated that eRMT did not have any effect on respiratory function, exercise time to exhaustion, or physiological responses to exercise but significantly decreased ratings of perceived exertion (RPE) during exercise. An increase in the concentrations of oxygenated hemoglobin [O2Hb], deoxygenated hemoglobin [HHb], and total hemoglobin [tHb] during exercise was observed post-eRMT compared to pre-eRMT, and this increase differed by hemisphere. Based on these preliminary findings, we suggest an eRMTinduced left-to-right hemodynamic shift during exercise, consistent with the change from a novel to a learned task.

Respiratory muscle endurance training in humans increases cycling endurance without affecting blood gas concentrations

2001 ◽  
Vol 84 (6) ◽  
pp. 582-586 ◽  
Author(s):  
Christoph Stuessi ◽  
Christina M. Spengler ◽  
Claudia Knöpfli-Lenzin ◽  
Gawril Markov ◽  
Urs Boutellier
Keyword(s):  
Endurance Training ◽  
Respiratory Muscle ◽  
Muscle Endurance ◽  
Blood Gas ◽  
Respiratory Muscle Endurance

scholarly journals Effects of Respiratory Muscle Endurance Training in Hypoxia on Running Performance

2019 ◽  
Vol 51 (7) ◽  
pp. 1477-1486 ◽  
Author(s):  
KEISHO KATAYAMA ◽  
KAZUSHIGE GOTO ◽  
TOSHIYUKI OHYA ◽  
ERIKA IWAMOTO ◽  
KENJI TAKAO ◽  
...  
Keyword(s):  
Endurance Training ◽  
Respiratory Muscle ◽  
Muscle Endurance ◽  
Running Performance ◽  
Respiratory Muscle Endurance

scholarly journals Long-Term Respiratory Muscle Endurance Training in Patients with Myasthenia Gravis: First Results after Four Months of Training

2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
Beate Rassler ◽  
Grit Marx ◽  
Stephanie Hallebach ◽  
Petra Kalischewski ◽  
Irene Baumann
Keyword(s):  
Myasthenia Gravis ◽  
Endurance Training ◽  
Respiratory Muscle ◽  
Muscle Endurance ◽  
Endurance Time ◽  
Maintenance Program ◽  
Training Frequency ◽  
First Results ◽  
Respiratory Muscle Endurance

Myasthenia gravis (MG) is characterized by reduced muscle endurance and is often accompanied by respiratory complications. Improvement of respiratory function is therefore an important objective in MG therapy. A previous study demonstrated that respiratory muscle endurance training (RMET) over four weeks increased respiratory muscle endurance of MG patients to about 200% of baseline. The purpose of the present study was to establish an appropriate maintenance training and to test its effects over four months. Ten patients with mild to moderate MG participated in this study. During the first month, they performed five training sessions per week. For the following 3 months, training frequency was reduced to five sessions per two weeks. Myasthenia score, lung function, and respiratory endurance were determined prior to training, after the first month, and after 4 months. Myasthenia score improved from0.71±0.1to0.56±0.1(P=0.007). Respiratory endurance time increased from6.1±0.8to20.3±3.0min (P<0.001). In conclusion, this RMET maintenance program is feasible and is significantly beneficial for MG patients.

scholarly journals Respiratory muscle endurance training reduces the O2 cost of cycling and perceived exertion in obese adolescents

2017 ◽  
Vol 313 (4) ◽  
pp. R487-R495 ◽  
Author(s):  
Desy Salvadego ◽  
Alessandro Sartorio ◽  
Fiorenza Agosti ◽  
Gabriella Tringali ◽  
Alessandra Patrizi ◽  
...  
Keyword(s):  
Body Mass ◽  
Respiratory Muscle ◽  
Perceived Exertion ◽  
Work Rate ◽  
Muscle Endurance ◽  
Mass Reduction ◽  
Obese Adolescents ◽  
Reduction Program ◽  
Body Mass Reduction ◽  
Respiratory Muscle Endurance

In obesity, the increased O2 cost of breathing negatively affects the O2 cost of exercise and exercise tolerance. The purpose of the study was to determine whether, in obese adolescents, the addition of respiratory muscle endurance training (RMET) (isocapnic hyperpnea) to a standard body mass reduction program decreases the O2 cost of exercise and perceived exertion. Nine male obese adolescents [16.0 ± 1.4 yr ( x ± SD), body mass 114.4 ± 22.3 kg] underwent 3 wk of RMET (5 days/week) in addition to a standard body mass reduction program. Eight age- and sex-matched obese adolescents underwent only the standard program (CTRL). Before and after interventions, patients performed on a cycle ergometer: incremental exercise; 12-min exercises at a constant work rate (CWR) of 65% and 120% at the gas exchange threshold (GET) determined before the intervention. Breath-by-breath pulmonary ventilation (V̇e) and O2 uptake (V̇o2), heart rate (HR), and ratings of perceived exertion for dyspnea/respiratory discomfort (RPER) and leg effort (RPEL) were determined. Body mass decreased (by ~3.0 kg) after both RMET ( P = 0.003) and CTRL ( P = 0.002). Peak V̇o2 was not affected by both interventions. Peak work rate was slightly, but significantly ( P = 0.04), greater after RMET but not after CTRL. During CWR < GET, no changes were observed after both interventions. During CWR > GET, the O2 cost of cycling at the end of exercise ( P = 0.02), the slope of V̇o2 vs. time (3–12 min) ( P = 0.01), RPER ( P = 0.01), and RPEL ( P = 0.01) decreased following RMET, but not following CTRL. HR decreased after both RMET ( P = 0.02) and CTRL ( P = 0.03), whereas V̇e did not change. In obese adolescents RMET, superimposed on a standard body mass reduction program, lowered the O2 cost of cycling and perceived exertion during constant heavy-intensity exercise.

scholarly journals Sex-Specific Effects of Respiratory Muscle Endurance Training on Cycling Time Trial Performance in Normoxia and Hypoxia

2021 ◽  
Vol 12 ◽  
Author(s):  
Julie Chambault ◽  
Grégorine Grand ◽  
Bengt Kayser
Keyword(s):  
Heart Rate ◽  
Endurance Training ◽  
Respiratory System ◽  
Respiratory Muscle ◽  
Time Trial ◽  
Cycling Performance ◽  
Muscle Endurance ◽  
Cycling Time Trial ◽  
Respiratory Muscle Endurance ◽  
Cycling Time

Objectives: We tested the hypotheses that respiratory muscle endurance training (RMET) improves endurance cycling performance differently in women and men and more so in hypoxia than in normoxia.Design: A prospective pre–post cross-over study with two testing conditions.Methods: Healthy and active women (seven, 24 ± 4 years, mean ± standard deviation [SD]) and men (seven, 27 ± 5 years) performed incremental cycling to determine maximum oxygen consumption (VO2peak) and power output (Wpeak) and on different days two 10-km cycling time trials (TTs) in normoxia and normobaric hypoxia (FiO2, 0.135, ~3,500 m equivalent), in a balanced randomized order. Next they performed supervised RMET in normoxia (4 weeks, 5 days/week, 30 min/day eucapnic hyperpnea at ~60% predicted maximum voluntary ventilation) followed by identical post-tests. During TTs, heart rate, ear oximetry reading, and Wpeak were recorded.Results: The VO2peak and Wpeak values were unchanged after RMET. The TT was improved by 7 ± 6% (p &lt; 0.001) in normoxia and 16 ± 6% (p &lt; 0.001) in hypoxia. The difference between normoxic and hypoxic TT was smaller after RMET as compared with that before RMET (14% vs. 21%, respectively, p &lt; 0.001). All effects were greater in women (p &lt; 0.001). The RMET did not change the heart rate or ear oximetry reading during TTs.Conclusion: We found a greater effect of RMET on cycling TT performance in women than in men, an effect more pronounced in hypoxia. These findings are congruent with the contention of a more pronounced performance-limiting role of the respiratory system during endurance exercise in hypoxia compared with normoxia and more so in women whose respiratory system is undersized compared with that of men.

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