What does the research say?
A systematic review by Behm and colleagues (2016) compared the acute effects of different types of stretching. Static stretching right before a test reduced performance slightly on average, while dynamic stretching improved it slightly. The effect depended on duration: with 60 seconds or more of static stretching per muscle group, the loss was larger than with less than 60 seconds. When dynamic activities followed the stretching, no clear effect remained.
Static stretching had no clear effect on injuries in the studies reviewed; for dynamic stretching there was no data. All forms of stretching improved range of motion in the short term.
Dynamic vs. static
The two types at a glance:
| Dynamic | Static | |
|---|---|---|
| How | controlled movement through the range of motion | hold a position still |
| Examples | leg swings, lunge with a twist, arm circles | kneeling hip flexor, forward fold, pigeon |
| Typical timing | in the warm-up, just before sports | after training, on rest days |
| Length | a few minutes | 30–60 sec per position |
What a warm-up looks like
First raise your heart rate – an easy jog, jump rope, jumping jacks – then dynamic movements for the joints and muscles of your sport, and finally movements at game pace. For runners that might be leg swings, lunges and ankle circles; for martial artists front and side leg swings and upper-body rotations; for tennis and climbing shoulder and wrist drills.
After training and on rest days
After training is the time for calm holds: hip flexors, hamstrings, calves, shoulders – depending on your sport. On rest days a longer mobility session can work on flexibility more specifically. The American College of Sports Medicine (ACSM) recommends that healthy adults do flexibility exercises for each of the major muscle-tendon groups on at least two days per week – a total of about 60 seconds per exercise, which you can split into several shorter holds.
How to breathe and how far to go
Breathe calmly and evenly through your nose. As you exhale, tension often eases a little and you can sink slightly deeper into the position. A good guide is a clear but comfortable pull: you can keep breathing normally and could hold the position for a while longer. If the feeling turns sharp, burning or radiates, back off. Stretching isn’t a competition – today’s flexibility is your starting point, not your benchmark.
Warm-ups by sport
Runners: leg swings, lunges, calf and ankle mobility. Soccer: add hip openers and lateral movement for the groin. Martial arts: high leg swings, hip rotation, upper-body twists and shoulder circles. Tennis, golf and climbing: shoulders, upper back and wrists. Strength training: hips and ankles for squats, shoulders for presses. In StretchZen each of these sports has its own dynamic warm-up.
Common mistakes
- Starting cold with long static stretches
- Doing dynamic drills in a jerky instead of controlled way
- A warm-up made only of stretching, with no cardio and no game-pace movement
- Stopping right after training without any calm stretching
Short answers
- Should I stretch before exercise? Yes, but dynamically, as part of your warm-up.
- Is static stretching before exercise bad? Short holds (under 60 seconds per muscle) followed by dynamic movement showed little effect.
- Does stretching prevent injuries? The evidence is not clear.
- How long should I warm up? Usually 10 to 15 minutes, depending on the sport.