They feel I need to bulk up, and to improve my upperbody strength.
他们觉得我需要变粗壮些,并增强上身的力量。
《柯林斯英汉双解大词典》
2
If you really don't like the cold, it's fine to go in the tub wearing running tights or sweatpants and a sweatshirt or towel wrapped around your upperbody.