-Cosplay -

Cosplay 一词源自日本，是 costume 和 play 的合成词。
costume
英 [ˈkɒstjuːm]  美 [ˈkɑːstuːm]
n. 服装，装束；戏服，表演服装；泳衣，泳装v. 给（某人）穿上特定服装
拓展national costume 民族服装chinese costume 中式装；唐装；中装

例句：

Kristen's passion for cosplay has been taken to the next level through these sessions.

克里斯汀对于角色扮演的热情经过这些拍摄活动已经进入了一个新阶段。

COSPLAY has been to show creative behavior, you can see these cartoon fans heart dress.

COSPLAY一直都是展现创意的行为，你可以看到这些卡通迷用心的装扮。

-Work out-

最近朋友圈兴起了一股跟着刘耕宏健身的热潮，那大家知道“健身”的英语怎么说嘛？

“健身”英文用work out 会比较适合。
work out 这个词，是指做的运动比较偏向肌力训练或是重训类等健身项目。

例句：

I really enjoyed it. Today's activity combined strength training with a fun element and attracted lots of people to come and work out here all hoping to improve their health.

我玩得非常开心，今天的活动把力量练习与趣味性结合在一起，吸引了许多人前来做健身运动，都希望把身体锻炼得更健康。

How about if you don't work out or eat healthy, does that mean you will not find your Mr or Miss Right?

如果你不健身或者饮食不健康，那就意味着你不可能找到自己的真命天子/女吗？

-exercise-

如果是指“运动”这件事，并不局限于力量训练，那么可以用 exercise～

exercise 所指的就比较宽泛。

例句：

You are probably well enough to take a little light exercise.

你恢复得不错，大概可以做些轻微的运动了。

Stretching exercises can help you avoid injury and improve your game.

伸展运动有助于防止身体受伤，并能提高比赛技巧。

-coach & instructor-

“教练”的英语是coach/kəʊtʃ/ 或instructor/ɪnˈstrʌktə(r)/ 。
coach 是最常用来表示“教练”的词，比如NBA的比赛场边，布置战术的教练就是 coach～
而 instructor 除了可以表示教练，还可以表示讲师、指导者。
健身教练则可以说 fitness coach或者fitness instructor。

例句：

They have spread their net far and wide in the search for a new team coach.他们撒开网四处物色新的运动队教练。

The team coach was forced to step in to stop the two athletes from coming to blows.

运动队教练不得不介入，才使两个运动员没有动起手来。

例句：

She has had a number of different jobs, ranging from chef to swimming instructor.

她做过许多不同的工作，从厨师到游泳教练。

Even the most gifted can have confidence destroyed by the wrong instructor.

即使是最有天赋的人也可能会被错误的导师摧毁自信。

-abs-

abs 腹肌
abs的全称是：abdominal muscles
abdominal /æbˈdɒmɪn(ə)l/ 是形容词腹部的。
腹肌不就是腹部的肌肉嘛！

希望这个夏天，大家都可以自信的露出腹肌！

例句：

Throughout the exercise, focus on keeping your abs tight.

整个锻炼过程中，注意要紧绷腹肌。

Sure, this isn't going to create 6-pack abs, but every calorie counts.

虽然这并不会帮你练就六块腹肌，但是每一个燃烧的卡路里都会有它的效果。