Hi,
Stretching is one of the most universally practised and least understood aspects of fitness.
Most people stretch because they were told to. Few have examined whether it actually does what they think.
Static stretching before exercise: probably not helpful
The traditional warm-up of holding stretches for 30-60 seconds before training is not well supported by the evidence.
Research consistently shows that static stretching immediately before strength training reduces force production, power output and performance. A muscle that has been held in a lengthened position for a prolonged period is temporarily weaker.
This doesn't mean never stretch. It means the timing matters.
What to do instead before training
A dynamic warm-up is better preparation for training than static stretching. This involves moving through ranges of motion rather than holding positions: leg swings, arm circles, bodyweight squats, hip rotations.
Dynamic movement increases blood flow, raises muscle temperature and activates the neuromuscular system without reducing force production.
Static stretching after exercise: probably fine, moderately useful
Stretching after training, when muscles are warm, is reasonable. It won't dramatically improve your flexibility if done briefly, but it does feel good and may marginally help with recovery.
For meaningful flexibility improvements, stretching needs to be consistent and sustained: 30-60 seconds per stretch, multiple times per week over months. Brief post-workout stretching is better than nothing but not transformative on its own.
Does stretching prevent injury?
The evidence here is weaker than most people assume. A systematic review of stretching and injury prevention found little consistent evidence that stretching before exercise reduces injury rates.
Injury prevention is better served by gradual load progression, adequate recovery, strength in the full range of motion and good movement mechanics.
Where stretching does help
For people with specific mobility restrictions that affect their training, targeted stretching is genuinely useful. If tight hip flexors are causing lower back issues, or limited shoulder mobility is affecting your pressing, addressing those restrictions improves both performance and injury risk.
Yoga and dedicated mobility work, which go beyond basic stretching, have stronger evidence for improving functional movement quality.
The Action:
Replace your pre-training static stretches with 5 minutes of dynamic movement. If you stretch after training, keep it, but don't expect it to be transformative on its own.
Chris
P.S. MyWorkoutz tracks your strength over time so you can see how changes to your warm-up routine affect your performance. Free at zenitstrength.co.uk
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