Antonyms for the word "strains oneself" would be to relax, take it easy, unwind, loosen up, chill out, de-stress, ease up, rest, and unwind. When working too hard or under too much pressure, it is essential to take a break and relax to avoid burning out. It is crucial for mental and physical health to find a balance between work and leisure. So, taking a break, switching off from work, meditating, hanging out with friends and family, or doing leisure activities such as reading, listening to music, or going for a walk can help individuals relax and unwind.