Mitochondria are structures in cells that produce cellular energy. The more functioning mitochondria a muscle contains, the healthier and more fatigue-resistant it is.
线粒体是细胞中产生能量的结构，肌肉中线粒体含量越多，小鼠就越健康，抗疲劳能力也就越强。
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"The number of mitochondria decreases in skeletal muscle as we age, and this affects us physically in terms of both muscle energy production and endurance," said Dr Malek.