Tags

Type your tag names separated by a space and hit enter

Inspiratory muscle activity during incremental exercise in obese men.
Int J Obes (Lond) 2007; 31(9):1456-63IJ

Abstract

OBJECTIVE

The aim of this study was to assess overall inspiratory muscle activity during incremental exercise in obese men and healthy controls using the non-invasive, inspiratory muscle tension-time index (T(T0.1)). We studied 17 obese subjects (mean age+/-s.d.; 49+/-13 years) and 14 control subjects (42+/-16) during an incremental, maximal exercise test.

METHODS

Measurements included anthropometric parameters, spirometry, breathing patterns and inspiratory muscle activity. T(T0.1) was calculated using the equation T(T0.1)=P(0.1)/P(Imax) x T(I)/T(TOT) (where P(0.1) is mouth occlusion pressure, P(Imax) is maximal inspiratory pressure and T(I)/T(TOT) is the duty cycle).

RESULTS

At same levels of maximal exercise (%W(max)) (20, 40, 60, 80, 100% W(max)), obese subjects showed higher P(0.1) (P<0.001) and P(0.1)/P(Imax) (P<0.001) values than controls. T(T0.1) was thus higher in obese subjects for each workload increment and at maximal exercise (P<0.001).

CONCLUSIONS

During exercise, patients with obesity show alterations in inspiratory muscle activity as a result of both reduced inspiratory strength (as measured by maximal inspiratory pressure) and increased ventilatory drive (as reflected by mouth occlusion pressure), which prone obese subject to respiratory muscle weakness. Our results suggest that impaired respiratory muscle activity could contribute to a decrease in exercise capacity. T(T0.1) may be useful in our understanding concerning the benefits of endurance training.

Authors+Show Affiliations

EA 3300 APS and Motor Patterns: Adaptations-Rehabilitation, Faculté des Sciences du Sport, Sport Science Department, Picardie Jules Verne University, Amiens Cedex, France. mehdi.chlif@u-picardie.frNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17593906

Citation

Chlif, M, et al. "Inspiratory Muscle Activity During Incremental Exercise in Obese Men." International Journal of Obesity (2005), vol. 31, no. 9, 2007, pp. 1456-63.
Chlif M, Keochkerian D, Feki Y, et al. Inspiratory muscle activity during incremental exercise in obese men. Int J Obes (Lond). 2007;31(9):1456-63.
Chlif, M., Keochkerian, D., Feki, Y., Vaidie, A., Choquet, D., & Ahmaidi, S. (2007). Inspiratory muscle activity during incremental exercise in obese men. International Journal of Obesity (2005), 31(9), pp. 1456-63.
Chlif M, et al. Inspiratory Muscle Activity During Incremental Exercise in Obese Men. Int J Obes (Lond). 2007;31(9):1456-63. PubMed PMID: 17593906.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Inspiratory muscle activity during incremental exercise in obese men. AU - Chlif,M, AU - Keochkerian,D, AU - Feki,Y, AU - Vaidie,A, AU - Choquet,D, AU - Ahmaidi,S, Y1 - 2007/06/26/ PY - 2007/6/28/pubmed PY - 2007/12/6/medline PY - 2007/6/28/entrez SP - 1456 EP - 63 JF - International journal of obesity (2005) JO - Int J Obes (Lond) VL - 31 IS - 9 N2 - OBJECTIVE: The aim of this study was to assess overall inspiratory muscle activity during incremental exercise in obese men and healthy controls using the non-invasive, inspiratory muscle tension-time index (T(T0.1)). We studied 17 obese subjects (mean age+/-s.d.; 49+/-13 years) and 14 control subjects (42+/-16) during an incremental, maximal exercise test. METHODS: Measurements included anthropometric parameters, spirometry, breathing patterns and inspiratory muscle activity. T(T0.1) was calculated using the equation T(T0.1)=P(0.1)/P(Imax) x T(I)/T(TOT) (where P(0.1) is mouth occlusion pressure, P(Imax) is maximal inspiratory pressure and T(I)/T(TOT) is the duty cycle). RESULTS: At same levels of maximal exercise (%W(max)) (20, 40, 60, 80, 100% W(max)), obese subjects showed higher P(0.1) (P<0.001) and P(0.1)/P(Imax) (P<0.001) values than controls. T(T0.1) was thus higher in obese subjects for each workload increment and at maximal exercise (P<0.001). CONCLUSIONS: During exercise, patients with obesity show alterations in inspiratory muscle activity as a result of both reduced inspiratory strength (as measured by maximal inspiratory pressure) and increased ventilatory drive (as reflected by mouth occlusion pressure), which prone obese subject to respiratory muscle weakness. Our results suggest that impaired respiratory muscle activity could contribute to a decrease in exercise capacity. T(T0.1) may be useful in our understanding concerning the benefits of endurance training. SN - 0307-0565 UR - https://www.unboundmedicine.com/medline/citation/17593906/Inspiratory_muscle_activity_during_incremental_exercise_in_obese_men_ L2 - http://dx.doi.org/10.1038/sj.ijo.0803546 DB - PRIME DP - Unbound Medicine ER -