Antonyms for the phrase "broke out a sweat" would include words such as "relaxed," "calm," "cool," "collected," or "unperturbed." These words paint a picture of a person who is composed and at ease, rather than someone who is stressed or anxious. In contrast to breaking out a sweat, these antonyms instead suggest a person who is experiencing a sense of inner peace and tranquility. Whether in a relaxing spa or simply lounging in a comfortable chair, these antonyms offer an alternative perspective to the experience of breaking out a sweat, providing a sense of balance and harmony to our daily lives.