"To do this stretch" means to perform a specific physical movement or exercise that involves extending and stretching your muscles in a particular way. Full definition
The group doing stretching exercises showed improved artery flexibility measured by sophisticated ultrasound techniques. (mindbodygreen.com)
In the 1920s, women would do their stretches in full make - up and the loose - fitting dresses of the era. (health.com)
If you feel your are not flexible, you can do stretches on those days when you do not train, but do not forget to warm up before. (abmachinesguide.com)