Key result
Fatigue and post tetanic twitch potentiation were both enhanced at short muscle lengths (30 degrees), with fatigue at 38% of maximal force and rested PTP at 68%.
Population
14 subjects
Comparison
Fatigue and post tetanic twitch potentiation… vs Different knee angles and rested vs. fatigued…
Design
Other
Follow-up
3 days
Authors
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Short lengths enhance opposing regulators independently; leaves open net effects on performance and needs confirmation before clinical use.
Fatigue and post tetanic twitch potentiation regulate force in opposite directions and are both enhanced at short muscle lengths, suggesting they represent independent mechanisms.
Dilson E. Rassier (2000) studied Skeletal muscle fatigue (n=14). Different muscle lengths (knee angles of 30, 60, and 90 degrees) vs. Comparison between different knee angles was evaluated on Fatigue (percentage of maximal force) and post tetanic twitch potentiation (PTP). Fatigue and post tetanic twitch potentiation were both enhanced at short muscle lengths (30 degrees), with fatigue at 38% of maximal force and rested PTP at 68%.
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