Dynamic stretching
Also known as: dynamic flexibility exercises, active warm-up stretching
Dynamic stretching moves a joint through its full range of motion with controlled, sport-specific movements rather than holding a position. It is the preferred stretching method during a warm-up because it raises tissue temperature without reducing power output.
Dynamic stretching uses movement to produce the stretch. Instead of holding an end-range position, the athlete performs repetitions of a controlled motion — walking knee hugs, leg swings, lunges with a torso twist, arm circles, high knees — that progressively take the joint through a larger range. The movements are deliberate and controlled, which distinguishes dynamic stretching from ballistic stretching, where bouncing momentum forces the joint past its usual limit and carries a higher injury risk.
A warm-up is conventionally divided into a general phase and a specific phase. The general warm-up raises core and muscle temperature with light activity like jogging or cycling for roughly five to ten minutes. The specific warm-up follows with dynamic stretching and movement patterns that resemble the activity to come, typically lasting eight to twelve minutes and increasing in intensity. Warmer muscle and connective tissue is more compliant, nerve conduction speeds up, and oxygen unloads from hemoglobin more readily.
The practical argument for dynamic over static stretching before training is performance. Prolonged static stretching immediately before an event has been shown to transiently reduce force production, power, and sprint speed, an effect sometimes called stretch-induced strength loss. Dynamic stretching avoids that trade-off and better rehearses the coordination the sport demands. Static stretching and proprioceptive neuromuscular facilitation (PNF) still have a place — after training or in a separate flexibility session, when the goal is increasing range of motion rather than preparing to perform.
For the NSCA's Certified Strength and Conditioning Specialist (CSCS) exam, know how to structure a warm-up, which stretching modality belongs in which phase of a session, the physiological effects of raising tissue temperature, and how dynamic, static, ballistic, and PNF stretching differ.
Key takeaways
- Dynamic stretching moves a joint through its range of motion with controlled, sport-specific movements rather than held positions.
- It belongs in the specific phase of a warm-up, after a brief general warm-up that raises tissue temperature.
- Unlike prolonged static stretching, dynamic stretching does not acutely reduce force and power output.
- Ballistic stretching uses bouncing momentum and carries greater injury risk than controlled dynamic movement.
- Static stretching and PNF are better placed after training or in a dedicated flexibility session.