An active warm-up is essential to achieve good form and maximum efficiency, especially if you train in the evening, advises Jason Fitzgerald, founder of StrengthRunning.com. A series of dynamic, prerun movements will lubricate the joints, improve your active range of motion, and wake up muscles that have been dormant all day, helping you to stay upright and extend out the back. For this, try Gary Gray’s celebrated lunge matrix.
Of course, you know what it feels like to have a tight muscle. But tight hips aren't just uncomfortable—they can lead to all sorts of other aches and pains, especially in the lower back. "People focus on the hips and say their hips are tight, but we don't always think about the fact that the lower back connects to our legs at the hip," Charlee Atkins, C.S.C.S., instructor at Soul Annex in New York City and creator of Le Stretch class, tells SELF. Tight hip flexors make it harder for your pelvis to rotate properly, which can cause your lower back to overcompensate, "and this can be a setup for lower-back injury," Teo Mendez, M.D., an orthopedic surgeon at NY Orthopedics who focuses on operative and non-operative management of sports-related injuries, musculoskeletal injuries, and arthritis, tells SELF.