I’m not claiming anyone should invest in a personal trainer. You’re putting words in my mouth. I’m just saying that things aren’t as easy or as simple as people describe due to a lack of basic body awareness and knowledge that comes with exercise. For example when I first started I developed severe back soreness the next day, to the point where I worried I had severely injured myself. Google was obviously unhelpful here, as “lower back sore exercise injury or not” is full of SEO spam. It was only when I got to speak with other friends who weightlifted more regularly that it was determined to be probably just soreness from not stretching.