So Basically for Yoga and strength training cutscene skips you need to get in the position that you will need to be in for that specific exercise and if you do it fast enough after your weight is being calculated, you will get a cutscene skip. It doesn't work for all of them such as the yoga poses that don't require the balance board but it should get you a sub 36.

Why miss the cutscenes? I always liked them in this game because they are perfectly directed and interesting. Also, the graphics for a project this old, given the huge pace of the industry, are quite high quality and detailed. But I like the game not because of the graphics or cutscenes. I love the gameplay, that is, yoga, both in the game and in life. I've recently bought myself these https://www.amazon.com/gp/product/B081TQ3L2Y yoga socks, and I just love them. They are incredibly comfortable, and the fabric feels really good against my skin. Also, the rubber inserts on the foot of the sock provide a good grip on the yoga mat, which is quite comfortable in some poses.

They are good to watch for advice on how to properly complete the exercises, but skipping the cutscenes is faster for speedrunning. The cutscenes in Yoga can be skipped after playing for four consecutive days; I don’t know if this applies for Strength Training as well.