I am going to lift weights.
我要去举重。（将来时态）
解析：
举重 名词，weightlifting
举重，动词词组，lift weight（s）。
weight lifter 举重运动员
be going to 将要干什么…
will 将要。
原句的同义语是
I will go to lift weights.
I will go to weightlifting.
I am going to weightlifting.
Lifting weights will build arm and shoulder muscles.
举重能使手臂和肩部的肌肉发达。
The weight lifter maxed out at 180 kilograms.
举重运动员使出了最大力量举起180公斤。
