decreased flexibility
A warmup or stretching of the muscles that you will be using.
it helps regulate breathing
Helps regulate breathing add my discord jasmine#0901
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.
if you stretch right it well do good
The most important effect is the fact that, running tires you and you will not be able to effectively workout. All your energy would have been spent in running and you wont have enough energy to workout with heavy weights.
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/
You should always stretch before working out. Failing to stretch properly before a workout will result in injuries. Shin splints are a common injury for runners and they are frequently a result of not properly stretching out. "Mountain climber" exercises are a great way to improve agility and speed.
Stretching helps to improve muscle strength. Tight muscles during exercise can actually cause problems. It is best to stretch before and after a workout.
The advantage of aerobic exercise after strength training is that the increased blood flow throughout the body removes lactic acid and metabolic waste from the muscle and provides the muscles with nutrients. Moreover, you will be warming up the muscles for a more effective session of stretching at the end of your workout. You were planning to do a full body stretch, right? Stretching is important to developing full range of motion for the joints and muscles.
Steam showers are a great way to relax your muscles and decrease stress in the body. However, they are better used to relax after a workout than before. Before a workout one should be sure to warm their muscles up with movement and stretching exercises.
There are a number of potential causes of foot cramps including dehydration, loss of blood flow to the feet, working out in hot temperatures or not stretching enough. They can be stopped by drink plenty of fluids, stretching before a workout and not overexerting.