Key result
A warm-up protocol of 15 tetani at 2-s intervals increased tetanic force by approximately 6% and almost halved myoplasmic [P(i)] in isolated mouse soleus muscle.
Why the study?
Does a brief warm-up protocol increase tetanic force and reduce myoplasmic [P(i)] in isolated mouse soleus muscle?
Does a brief warm-up protocol increase tetanic force and reduce myoplasmic [P(i)] in isolated mouse soleus muscle?
Answers are grounded in this paper and cite their sources.
A brief warm-up protocol increases tetanic force and reduces myoplasmic inorganic phosphate in mouse soleus muscle, suggesting a mechanism for exercise-induced force potentiation.
Muscle performance is improved after a brief period of exercise (warm-up). One factor that is known to strongly affect force production is the myoplasmic concentration of inorganic phosphate ([P(i)]). Improved performance after warm-up may therefore be due to a reduction of [P(i)]. Herein, we show that after a warm-up protocol (15 tetani at 2-s intervals), tetanic force is increased by approximately 6% (P < 0.05) and [P(i)] is almost halved (P < 0.05) in isolated mouse soleus muscle. A warm-up protocol with longer intervals (15 tetani at 5-s intervals) reduced tetanic force and did not alter [P(i)]. We conclude that a reduction of [P(i)] contributes to the force-potentiating effect of warm-up.
No takes yet. Share an insight, caveat, or question.
Bruton et al. (1997) studied this question. Warm-up protocol (15 tetani at 2-s intervals) vs. Warm-up protocol with longer intervals (15 tetani at 5-s intervals) was evaluated on Tetanic force and myoplasmic [P(i)] (p=< 0.05). A warm-up protocol of 15 tetani at 2-s intervals increased tetanic force by approximately 6% and almost halved myoplasmic [P(i)] in isolated mouse soleus muscle.
Synapse has enriched 10 related papers. Consider them for comparative context: