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Effects of high-frequency initial pulses and posttetanic potentiation on power output of skeletal muscle.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Abbate, Fabio Sargeant, Anthony Verdijk, Peter W. L. Haan, Arnold De |
| Copyright Year | 2000 |
| Abstract | The effects of high-frequency initial pulses (HFIP) and posttetanic potentiation on mechanical power output during concentric contractions were examined in the in situ medial gastrocnemius of the rat with an intact origin on the femur and blood supply. Stimulation of the muscle was performed via the severed sciatic nerve. In the experiments, HFIP or the potentiating tetanus was followed by a stimulation of 80, 120, or 200 Hz. The results showed that both HFIP and the tetanus increased power output at high contraction velocities (>75 mm/s) when followed by a train of 80 or 120 Hz (200 Hz resulted in no effects). Mechanical power output was increased maximally by HFIP to 120 and 168% by the tetanus. Furthermore, when HFIP or the tetanus were followed by a train of 80 Hz, the peak power in the power-velocity curve tended to be shifted to a higher velocity. |
| Starting Page | 35 |
| Ending Page | 40 |
| Page Count | 6 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://jap.physiology.org/content/jap/88/1/35.full.pdf |
| PubMed reference number | 10642359v1 |
| Volume Number | 88 |
| Issue Number | 1 |
| Journal | Journal of applied physiology |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Eighty Gastrocnemius muscle structure Hertz (Hz) Millimeter Per Second Myalgia Reprint Science Skeletal muscle structure Structure of sciatic nerve Tetany chemosensitization/potentiation |
| Content Type | Text |
| Resource Type | Article |
