Respiratory and cardiovascular responses to static handgrip exercise in humans
| Autor: | P. Panuccio, Giovanni A. Fontana, F. Cresci, Tito Pantaleo, Fulvia Bongianni, R. Manconi |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Adult
Male medicine.medical_specialty Respiratory rate Physiology Blood Pressure Physical exercise Heart Rate Physiology (medical) Internal medicine Muscle tension Heart rate medicine Humans Exercise Tidal volume Electromyography business.industry Respiration Hemodynamics Carbon Dioxide musculoskeletal system Respiratory Function Tests body regions Mean blood pressure Breathing Cardiology Physical therapy business human activities Respiratory minute volume |
| Zdroj: | Journal of Applied Physiology. 75:2789-2796 |
| ISSN: | 1522-1601 8750-7587 |
| Popis: | We studied the time course of respiratory and cardiovascular responses by evaluating changes in the breathing pattern, mean blood pressure (MBP), and heart rate elicited by 3 min of static handgrip at 15, 25, and 30% of the maximum voluntary contraction (MVC) in 15 healthy volunteers. Muscle tension and integrated electromyographic activity remained fairly constant during each trial. During 15% MVC bouts, initially only mean inspiratory flow increased; then, tidal volume and minute ventilation (VI) also rose progressively. No significant changes in MBP and heart rate were observed. During 25 and 30% MVC bouts, not only did mean inspiratory flow, VT, and VI increase but MBP and heart rate increased as well. A slight and delayed rise in respiratory rate was also observed. Unlike 15 and 25% MVC handgrip, 30% MVC handgrip caused a small decrease in end-tidal PCO2. Changes in the pattern of breathing occurred more promptly than those in cardiovascular variables in the majority of subjects. Furthermore, we found a positive correlation between changes in VI and those in cardiovascular variables at the end of 25 and 30% MVC trials. This study indicates that respiratory and cardiovascular responses to static handgrip exercise are controlled independently. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|