It is both. Stretching is a kind process that prepares both your mind and your body for the work is coming ahead. It is absolutely necessary to get your body to produce the maximum output. It’s like having a small cup of tea before you force your heart rate to 190 (short of a heart attack,) Someone else mentioned , you have to warm up, then stretch. Then workout, then stretch as a cooldowm to achieve fficiency.

There’s a number 6, where if you’re on a small team with good synergy and well experienced members, the PR is a good thing each member requests to answer the question , hey can you double check my work and please give me feedback because I really trust your judgement.it’s a no nonsense way for confident developers to get a second opinion.