For upper body muscle endurance, caffeine did… pretty much nothing.

对于上半身肌肉的耐力来说，咖啡因几乎没有任何作用。

So a goal has been to find a way to measure lactate in saliva to monitor muscle endurance.

因此，科学家的目标是找到一种方法，通过测量唾液中的乳酸来监测肌肉耐力。

If you were wondering, performance, in both muscle endurance and strength, is largely unaffected by massage guns and massage therapies in general.

如果你想知道，其实肌肉在耐力和力量方面的表现，基本上不受按摩枪和按摩疗法的影响。

They were tested for changes in body composition, muscle strength, and muscle endurance with the goal, obviously, to observe differences in these measurements between the two creatine timings.

他们接受了身体成分、肌肉力量和肌肉耐力变化的测试，目的显然是观察两种肌酸在时间变化上对于这些测量指标上的差异。