According to research published in The Journal of Strength and Conditioning Research , if you stretch your muscles before lifting, you feel weaker and less stable when you exercise afterward.
On the other hand, recently The Scandinavian Journal of Medicine and Science in Sports analyzed 104 different studies and concluded that the habit of stretching without moving during the warm-up phase prior to practicing a sport should be avoided , because it weakens muscles and hinders movements, especially those that require explosive performance. To this is added that studies carried out by orthopedists show that there are no differences in the number of injuries suffered by runners who stretch before launching into the race and those who do not, so this practice would not serve to protect or the joints nor the muscles.
