Great post and upvoted. I tore my hamstring surfing and have been doing alot of mobility excercises rather than actual stretching for physiotherapist. One example is lying on my back and with a bent knee extending the leg up vertically straight without pain and then back to a bent position. I think they are called extenders which help the muscle repair properly. I really dont think holding stretches like I was taught when younger is that effective. Its better to slowly warm up like light skipping or the method you have posted . I believe Stretching can actually tear the muscles and be counter productive. I also do one legged divers. Sort of like a straight legged deadlift which assist strength, flexibility balance. Thanks for the post. I will try this method when warming up.