Effect of inspiratory muscle strength training on inspiratory motor drive and RREP early peak components

2003 ◽  
Vol 94 (2) ◽  
pp. 462-468 ◽  
Author(s):  
Chien Hui Huang ◽  
A. Daniel Martin ◽  
Paul W. Davenport
Keyword(s):  
Muscle Strength ◽  
Strength Training ◽  
Inspiratory Muscle ◽  
Motor Drive ◽  
Pressure Threshold ◽  
Before And After ◽  
Inspiratory Motor ◽  
Early Peak ◽  
Mouth Occlusion Pressure ◽  
Inspiratory Muscle Strength

This study investigated the effect of inspiratory muscle strength training (IMST) on inspiratory motor drive [mouth occlusion pressure at 0.1 s (P0.1)] and respiratory-related evoked potentials (RREP). It was hypothesized that, if IMST increased inspiratory muscle strength, inspiratory motor drive would decrease. If motor drive were related to the RREP, it was further hypothesized that an IMST-related decrease in drive would change RREP latency and/or amplitude. Twenty-three subjects received IMST at 75% of their maximal inspiratory pressure (Pi max) with the use of a pressure threshold valve. IMST consisted of four sets of six breaths daily for 4 wk. P0.1 and the RREP were recorded before and after IMST. Posttraining, Pi maxincreased significantly by 36.0 ± 2.7%. P0.1decreased significantly by 21.9 ± 5.2%. The increase in Pi max was significantly correlated to the decrease in P0.1. RREP peaks P1a, Nf, P1, and N1 were identified pre- and post-IMST, and there was no difference in either amplitude or latency for those peaks. These results demonstrate that high-intensity IMST significantly increased Pi max, decreased P0.1, but did not change the RREP.

Effect of Moderate- or High-Intensity Inspiratory Muscle Strength Training on Maximal Inspiratory Mouth Pressure and Swimming Performance in Highly Trained Competitive Swimmers

2021 ◽  
pp. 1-7
Author(s):  
Toshiyuki Ohya ◽  
Kenta Kusanagi ◽  
Jun Koizumi ◽  
Ryosuke Ando ◽  
Keisho Katayama ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Strength Training ◽  
High Intensity ◽  
Swimming Performance ◽  
Inspiratory Muscle ◽  
Inspiratory Pressure ◽  
Pressure Threshold ◽  
Mouth Pressure ◽  
Inspiratory Muscle Strength ◽  
Competitive Swimmers

Purpose: Inspiratory muscle strength training (IMST) can improve exercise performance. Increased maximal inspiratory mouth pressure (MIP) could be beneficial for swimmers to enhance their performance. This study aimed to clarify the effect of high-intensity IMST for 6 weeks on MIP and swimming performance in highly trained competitive swimmers. Methods: Thirty male highly trained competitive swimmers were assigned to high-intensity IMST (HI; n = 10), moderate-intensity IMST (MOD; n = 10), and control (n = 10) groups. The 6-week IMST intervention comprised twice daily sessions for 6 d/wk at inspiratory pressure threshold loads equivalent to 75% MIP (HI) and 50% MIP (MOD). Before and after the intervention, MIP and swimming performance were assessed. Swimming performance was evaluated in free and controlled frequency breathing 100-m freestyle swimming time trials in a 25-m pool. For controlled frequency breathing, participants took 1 breath every 6 strokes. Results: The MIP values after 2 and 6 weeks of IMST in the HI and MOD groups were significantly higher than those before IMST (P = .0001). The magnitudes of the MIP increases after 6 weeks of IMST did not differ between the HI (13.4% [8.7%]) and MOD (13.1% [10.1%]) groups (P = .44). The 100-m freestyle swimming times under the controlled frequency condition were significantly shorter after IMST than those before IMST in both the HI (P = .046) and MOD (P = .042) groups. Conclusions: Inspiratory pressure threshold load equivalent to 50% MIP could be sufficient to improve MIP and swimming performance under the controlled frequency breathing condition in highly trained competitive swimmers.

Effects of changes in inspiratory muscle strength on the sensation of respiratory force

1991 ◽  
Vol 70 (1) ◽  
pp. 240-245 ◽  
Author(s):  
S. Redline ◽  
S. B. Gottfried ◽  
M. D. Altose
Keyword(s):  
Muscle Strength ◽  
Strength Training ◽  
Respiratory Muscle ◽  
Muscle Force ◽  
Normal Subjects ◽  
Inspiratory Muscle ◽  
Magnitude Scaling ◽  
Before And After ◽  
Command Signals ◽  
Inspiratory Muscle Strength

The sensation of respiratory muscle force was compared in seven normal subjects before and after inspiratory muscle strength training. Subjects performed 20 sustained maximal inspiratory maneuvers daily for 6–18 wk. Maximal inspiratory pressures (MIP) increased from 124 +/- 10 to 187 +/- 9 (SE) cmH2O (P less than 0.005). Exponents of the power function relationships between mouth pressure (Pm) and the intensity of the sensation of force, corrected for inspiratory duration, during magnitude scaling of resistive and elastic ventilatory loads were the same before and after training (P greater than 0.05). However, absolute sensation intensity (S) during resistive and elastic loading was reduced significantly after strength training but returned toward baseline levels greater than or equal to 8 wk after the cessation of training when the MIP had fallen to 150 +/- 5 cmH2O. The absolute S at a given Pm during ventilatory loading changed inversely with changes in MIP (P less than 0.001). Furthermore the relationship between absolute S and Pm expressed as a proportion of the MIP (Pm/MIP) was constant over testing periods. These results suggest that the sensation of respiratory muscle force reflects the proportion of the maximum force utilized in breathing and may be based on the level of respiratory motor command signals.

scholarly journals High‐Resistance Inspiratory Muscle Strength Training Improves Cerebrovascular Function in Midlife/Older Adults

2021 ◽  
Vol 35 (S1) ◽  
Author(s):  
Kaitlin Freeberg ◽  
Thomas Heinbockel ◽  
Matthew Rossman ◽  
Rachel Jackman ◽  
Lindsey Jankowski ◽  
...  
Keyword(s):  
Older Adults ◽  
Muscle Strength ◽  
Strength Training ◽  
High Resistance ◽  
Inspiratory Muscle ◽  
Cerebrovascular Function ◽  
Inspiratory Muscle Strength

Exercise Physiology at “Conversational Level” is not Impaired under Wearing Masks or Respirators: Disproving False Myths (Preprint)

2021 ◽  
Author(s):  
Davinia Vicente-Campos ◽  
Violeta Sanchez-Migallón ◽  
César Calvo-Lobo ◽  
Sandra Sanchez-Jorge ◽  
Mónica Arce-Palomares ◽  
...  
Keyword(s):  
Heart Rate ◽  
Muscle Strength ◽  
Perceived Exertion ◽  
Exercise Physiology ◽  
Inspiratory Muscle ◽  
Metabolic Parameters ◽  
Recreational Physical Activity ◽  
Surgical Masks ◽  
Before And After ◽  
Inspiratory Muscle Strength

UNSTRUCTURED The aim of this study was to evaluate the effects of the use of both surgical masks and FFP2 respirators on the inspiratory muscle strength, metabolic parameters, heart rate, subjective perceived exertion and dyspnea perception, before and during 30 minutes stable load exercise at “conversational level”. A randomized cross-over study was carried out. Nineteen healthy adults completed 3 conditions (without mask, with surgical mask or FFP2 respirator) during a 30-minute steady-state-test at the lactate threshold intensity. Inspiratory muscle strength was measured before and after the test, and metabolic parameters, heart rate, subjective perceived exertion and dyspnea perception were collected at baseline, during and after the test. There was a significant reduction in inspiratory muscle strength after the 30-minutes-test in all conditions (control:-6.26 mmHg, p<0.5; surgical mask:-8.55mmHg, p<0.01; FFP2respirator:-12.42 mmHg, p<0.001), but without significant differences between them (p=0.283). Data showed a statistically significant effect for time, but did not show a statistically significant interaction between condition and time for heart rate (p=0.674), oxygen saturation (p=0.297), blood lactate level (p=0.991), rating perceived exertion (p=0.734) and dyspnea (p=0.532) comparisons. The present study findings suggested that inspiratory muscle strength and physiological parameters during “conversational level” exercise were not impaired under wearing masks in healthy, non-smoking young adults, who participated in regular recreational physical activity for at least 3 days per week.

scholarly journals Effects of a Rehabilitation Programme with a Nasal Inspiratory Restriction Device on Exercise Capacity and Quality of Life in COPD

2020 ◽  
Vol 17 (10) ◽  
pp. 3669 ◽  
Author(s):  
Aurelio Arnedillo ◽  
Jose L. Gonzalez-Montesinos ◽  
Jorge R. Fernandez-Santos ◽  
Carmen Vaz-Pardal ◽  
Carolina España-Domínguez ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Muscle Strength ◽  
Exercise Capacity ◽  
Rehabilitation Program ◽  
Inspiratory Muscle ◽  
Control Group ◽  
6Mwt Distance ◽  
Before And After ◽  
Inspiratory Muscle Strength

Objective: The objective was to assess the effects of a nasal restriction device for inspiratory muscle training, called Feelbreathe®, added to a rehabilitation program (RP) on exercise capacity, quality of life, dyspnea and inspiratory muscle strength in patients with stable COPD. Methods: Patients were randomized into three groups, one performed a supervised RP using the Feelbreathe® device (FB group), the second group developed the same RP with oronasal breathing without FB (ONB group) and the third was the control group (CG). We evaluated inspiratory muscle strength (PImax), dyspnea (mMRC), quality of life (CAT) and exercise capacity (6MWT) before and after 8-week of RP. Results: A total of 16 patients completed the study, seven in FB group, five in ONB group and four in the CG. After the RP, the FB group showed a significant increase in PImax (93.3 ± 19.1 vs. 123.0 ± 15.8 mmHg) and in the 6MWT distance (462.9 ± 71.8 m vs. 529.1 ± 50.1 m) and a decrease in the CAT score (9.7 ± 6.5 vs. 5.9 ± 6.0) and in the mMRC dyspnea score. FB provides greater improvement in PImax, dyspnea, quality of life and 6MWT than ONB. Conclusions: The Feelbreathe® device provides greater improvements in quality of life, dyspnea, exercise capacity and inspiratory muscle strength compared to patients that did not use it.

Sign in / Sign up

Export Citation Format

Share Document