tone muscle

基本解释

Strength training and cardio boost circulation and improve muscle tone, which results in younger-looking, toned skin.
力量训练和有氧运动能促进血液循环，改善肌肉张力，就会滋润肌肤让你看起来更加年轻。
It's a self-defeating strategy, you need to eat enough, and particularly protein, to build lean and toned muscle in the first place.
这种做法其实是自拆台脚，你必须吃的足够多，尤其是蛋白质，以便塑造瘦的肌肉
We have no evidence that wearing a bra could prevent sagging, because the breast itself is not muscle, so keeping it toned up is an impossibility.
从某种程度上来说，所有女性的胸部都将会松弛或下垂，这是一个自然的、不可避免的过程--只有胸部很小者才会例外。