The interaction of post-activation potentiation and fatigue on skeletal muscle twitch torque and displacement
Georg Langen, Frank Warschun, Olaf Ueberschär, Michael Behringer · 2025
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Description
A hard set of lifts can leave a muscle both stronger for a few minutes and tired for far longer. Georg Langen and co-authors test whether a common muscle scan can tell the two apart. Their 2024 study used tensiomyography, which reads the twitch of a thigh muscle after a small electric pulse. Sixteen trained adults did heavy knee extension sets while twitch size and twitch torque were tracked.
Peak twitch torque jumped 44 percent after the first set, then fell about a third below start by the last set and stayed low fifteen minutes on. Twitch displacement, the scan's own readout, barely moved through all of it. As a result the scan could not reliably flag who was primed or who was fatigued. The authors blame the bent-knee test position, which stretches the muscle and muddies the signal, and warn labs to mind joint angle.
Catalog record
| CREATOR | Georg Langen, Frank Warschun, Olaf Ueberschär, Michael Behringer |
|---|---|
| YEAR | 2025 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 58 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |