GSP’s trainer Firas Zahabi prescribes to this. I remember his mentioning this in a Rogan podcast. His philosophy to training is minimal to 0 pain/soreness.

Instead of doing pull ups till you drop start with 1 and do it daily. I started running after a long time. I’m 49. I work out with weights but needed mild cardio. I started with 0.25 m run / 0.25 m walk cadence. I can easily do that for 5-6 miles and keep my heart rate below 165.

Bottom line is - take it easy. The goal is to burn calories, stay mobile and not get injured or sore.