it helps regulate breathing
Dynamic stretching before a workout can help improve flexibility, increase blood flow to muscles, enhance performance, reduce the risk of injury, and prepare your body for the exercises ahead.
It is generally recommended to foam roll before stretching as it can help release tension in the muscles and improve flexibility. Stretching after foam rolling can further enhance the benefits and help prepare your muscles for exercise.
A warmup or stretching of the muscles that you will be using.
decreased flexibility
If you are going to be running, it is a good thing to stretch, but more importantly than stretching before you workout is stretching after to get the ketones out of your muscles and prevent exhaustion.
Using a batch pre-workout supplement before a workout can provide benefits such as increased energy, improved focus, enhanced performance, and better endurance during exercise.
It mean after your workout; not before or during, but right after.
if you stretch right it well do good
According to the McGill University Department of Physiology stretching before a workout can actually be damaging to a person's body. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1071358/
Stretching exercises should be performed both before and after physical activity to optimize their benefits. Stretching before activity helps warm up the muscles and prevent injury, while stretching after activity helps improve flexibility and reduce muscle soreness.
It is recommended to perform static stretching at the end of a workout or physical activity session. This helps to relax the muscles and improve flexibility after they have been warmed up. Static stretching before exercise can decrease muscle strength and power, so it is best to save it for the end of your workout.
so you don't tear ur muscles