The answer is not one or the other. You should do both, but different kinds at different times: dynamic stretching before your workout, and static stretching after. Doing it the other way around, holding long static stretches on cold muscles before training, can actually reduce your strength and power and does little to prevent injury. Here is the evidence-based breakdown, with the numbers, ready-to-use routines, and the myths worth dropping.
The Short Answer
- Before your workout: dynamic stretching, as part of a 5 to 10 minute warm-up.
- After your workout: static stretching, as a cool-down when muscles are warm.
This is the consensus across sources like the Cleveland Clinic, Harvard Health, and Hinge Health.
Dynamic vs Static Stretching
|
|
Dynamic stretching |
Static stretching |
|
When |
Before (warm-up) |
After (cool-down) |
|
What it is |
Active movements through full range of motion |
Holding a lengthened position |
|
What it does |
Raises muscle temperature, blood flow, and neural drive |
Improves long-term flexibility, aids recovery |
|
Examples |
Leg swings, walking lunges, arm circles |
Hamstring, quad, and calf holds |
|
Effect on performance |
Primes speed, power, agility |
Can reduce power if done before training |
|
Hold or duration |
Continuous, 5 to 10 minutes |
15 to 60 seconds per stretch |
Why Not Static Stretching Before?
The classic habit of holding long static stretches before a workout is backed by little evidence and may hurt performance:
- A 2012 meta-analysis (Simic et al.) found that prolonged pre-workout static stretching can reduce muscle strength by around 10 percent.
- As the Cleveland Clinic notes, that performance dip is temporary, lasting only a few minutes and not affecting long-term strength or endurance.
- Harvard Health is blunt: pre-exercise static stretching does not prevent injury or muscle soreness, which was the original reason most people did it.
- The nuance: short static holds (under 60 seconds) inside a fuller warm-up are unlikely to harm you. The real downside is long, isolated static stretching on cold muscles before training.
Bottom line: warm up with movement, not with long holds.
A Ready-to-Use Dynamic Warm-Up (5 to 10 Minutes)
Do these before training, ramping toward the movements of your session:
- Light jog or brisk walk, 3 to 5 minutes
- Arm circles and shoulder rolls, 30 seconds
- Leg swings, 10 per leg, front-to-back and side-to-side
- Walking lunges, 10 per side
- High knees and butt kicks, 30 to 45 seconds
- Hamstring scoops or inchworms, 1 minute
- Bodyweight squats, 10 to 15 reps
A Ready-to-Use Static Cool-Down (5 Minutes)
Do these after training, when muscles are warm. Move into mild tension, never pain, and breathe deeply:
- Standing quad stretch, 30 seconds per side
- Standing or seated hamstring stretch, 30 seconds per side
- Calf stretch against a wall, 30 seconds per side
- Cross-body shoulder stretch, 30 seconds per side
- Overhead triceps stretch, 30 seconds per side
- Glute or figure-four stretch, 30 seconds per side
- Child’s pose or cat-cow, 1 minute
Hold each stretch 15 to 60 seconds (30 seconds is a good default), for 2 to 4 rounds on tight areas. That works out to roughly 1 to 2 minutes total per muscle group. For a guided sequence, try our 10-minute morning stretch routine.
Should You Stretch Before or After Running?
For running specifically, do not do long static stretches first. Warm up with an easy jog and dynamic drills, then save static stretching for after the run. Post-run stretching will not dramatically cut injury risk, but it supports flexibility and feels good as part of a cool-down.
Common Stretching Mistakes
- Using static stretching as your only warm-up (it cuts power and does not protect you).
- Stretching cold muscles deeply, which raises injury risk.
- Bouncing into stretches (ballistic stretching), which can cause strain.
- Pushing into pain instead of mild tension.
- Skipping stretching entirely, so muscles gradually tighten and shorten.
- Holding your breath instead of breathing through the stretch.
Who Needs More Mobility Work
Desk workers, older adults, and anyone with tight hips or hamstrings benefit from extra dedicated mobility sessions beyond their warm-up and cool-down. Yoga is an excellent option here. See our guide to improving flexibility with yoga and, for staying healthy through training, yoga for injury prevention and recovery. Pairing breath with movement also helps, as covered in breathing in yoga.
What to Wear for Stretching and Mobility
Stretching demands a full, unrestricted range of motion, so your clothing should move with you and never dig in. Choose four-way-stretch leggings with a comfortable waistband, breathable pieces from the women’s training or men’s training collections, and a stable yoga mat for floor-based stretches.
Frequently Asked Questions
Should I stretch before or after a workout?
Both, but differently: dynamic stretching before, static stretching after.
Is it bad to stretch before exercise?
Long static stretching before training can temporarily reduce strength and power by around 10 percent. Dynamic stretching before is beneficial.
Does stretching prevent injury or soreness?
Pre-exercise static stretching does not reliably prevent injury or soreness. A proper warm-up matters more.
How long should I hold a stretch?
15 to 60 seconds per stretch, with 30 seconds a good default, for 2 to 4 rounds on tight muscles.
Can I stretch if I am injured?
Avoid stretching an acute injury or a recent surgical site until cleared by a professional.
