Stretching & recovery

Stretching types and doses, a stretch catalog, and recovery methods ranked by evidence: sleep, massage, foam rolling, compression, cold water, heat and painkillers, plus how to tell soreness from injury. Pre-run stretching and drills are in running warm-up drills, food and fluids in nutrition & hydration, rest weeks in training plans.

Stretching types

• Acute ROM gains from any stretch last under ~30 min (Behm et al. 2016); lasting gains need weeks of regular work.
• Afonso et al. (2021): full-range strength training and stretching improved ROM equally (11 trials).
• Static stretching reduces stiffness and raises stretch tolerance; there is no good evidence that it prevents overuse running injuries.

Dose for flexibility

ACSM position stand (Garber et al. 2011), for healthy adults:

Acute effects on strength and power

Behm et al. (2016), testing within minutes of stretching:

Short static holds are fine before training, especially if dynamic work follows. Save long holds and PNF for after the session or a separate time. Details and warm-up use: running warm-up drills.

Stretching and soreness

Herbert et al. (Cochrane review, 2011), randomized trials in healthy adults:

Conclusion: stretching does not reduce DOMS by a clinically important amount. Stretch for range of motion, not to avoid soreness.

Stretch catalog

Hold each 2–4 × 15–30 s per side (60 s total for flexibility gains), breathing slowly; ease in, no bouncing.

Image: InjuryMap, CC BY-SA 4.0 (opens in a new tab), via Wikimedia Commons (opens in a new tab).

The gastrocnemius crosses the knee, so it only stretches with the knee straight; bending the knee slackens it and shifts the stretch to the soleus. Runners need both.

Watch the two calf stretches side by side and how the knee position changes the target.

Mobility vs flexibility

Aim for enough mobility for your sport (a full squat, hip extension for running, overhead reach for pressing), not maximum flexibility. If passive range is fine but active range is poor, add strength at end range rather than more stretching.

Recovery methods by evidence

Ordered roughly by strength of evidence and size of effect. Do the top rows before paying for the bottom ones.

Sleep

Cold-water immersion

• Dose: 11–15 °C for 11–15 min gave the best soreness results (Machado 2016); 10–15 °C for 5–15 min for performance recovery (Versey 2013).
• Roberts et al. (2015): 10 min at ~10 °C, waist-deep, after each of 2 strength sessions a week for 12 weeks. The active-recovery group gained type II fiber size (+17 %) and isokinetic work (+19 %); the cold-water group did not gain significantly.
• Use it when the next performance matters more than adaptation (tournaments, stage races, two races in a weekend), not routinely after strength sessions.

Painkillers (NSAIDs)

• Lilja et al. (2018): 1200 mg/day ibuprofen for 8 weeks of training in 18–35-year-olds halved quadriceps growth versus low-dose aspirin (+3.7 % vs +7.5 %).
• Lipman et al. (2017): 400 mg ibuprofen every 4 h during an 80 km ultramarathon stage: acute kidney injury in 52 % vs 34 % on placebo (difference not statistically significant, but in the harmful direction).
• Don't take NSAIDs before or during long races. For recurring pain, see a doctor or physio rather than training on painkillers.

Foam rolling

Roll each muscle slowly for 30–60 s, pausing on tender spots at a pressure you can relax into. Avoid rolling directly over bone, joints or the lower back.

Watch the positions for calves, hamstrings, quads and glutes, and how to control pressure with your arms.

Soreness or injury?

Get urgent medical help if you have severe muscle pain with dark (tea- or cola-colored) urine, weakness or unusual fatigue after hard exercise: signs of rhabdomyolysis (CDC). It needs a blood test (creatine kinase).

Monitoring: HRV and resting heart rate

• Interpret against your own baseline and the training context, not population norms (Buchheit 2014).
• HRV can go up or down with fatigue in trained athletes (Plews 2013); a trend change of several days is the signal, together with how you feel and train.
• Alcohol, illness, heat, travel and stress all move HRV: note them.

Rest days and deloads

• Adaptation happens during recovery; hard sessions need easy days between them.
• Plan at least one rest or very easy day a week and regular lighter weeks (deloads); volumes and timing are in training plans.
• Take an unplanned easy day or two when HRV and resting HR trend the wrong way, sleep is poor, or soreness lasts beyond 3 days.
• Persistent fatigue, falling performance, frequent illness or missed periods over weeks can mean overtraining or low energy availability: see a doctor and get bloods checked.

Recipes

10-minute post-run stretch routine

After runs, while warm. One round of 40–45 s per side; for flexibility gains do 2 rounds on 2–3 days a week.

Watch a follow-along post-run version with most of these stretches.

Desk-worker mobility routine

For long days at a desk: 5–8 min, 1–3 times a day.

1. Stand up; 10 slow bodyweight squats or sit-to-stands
2. Half-kneeling hip flexor stretch      30 s per side
3. Doorway pec stretch                   30 s per side
4. Thoracic extension over chair back    8 slow reps
5. Seated or standing rotation           8 per side
6. Chin tucks                            10 x 3 s
7. Standing calf stretch, knee straight  30 s per side
8. Walk for 2 min (water, stairs, a lap of the office)

Watch a physical therapist lead a 10-minute desk version.

Sleep hygiene checklist

When sleep is under 7 h or unrefreshing. Based on the Walsh 2021 athlete consensus.

• Same wake time every day, weekends within ~1 h.
• 7–9 h in bed-to-sleep opportunity; more in heavy training blocks.
• Morning daylight within an hour of waking.
• Caffeine: none after early afternoon (it lengthens time to fall asleep and shortens sleep).
• No alcohol or heavy meals close to bed.
• Bedroom dark, quiet, 17–22 °C; phone out of reach.
• 20–30 min wind-down routine without screens.
• Can't sleep after ~20 min: get up, do something dull in dim light, return when sleepy.
• Naps: 20–30 min, before mid-afternoon; skip them if night sleep is a problem.
• Snoring with gasps, or daytime sleepiness despite enough time in bed: see a doctor.

Post-race recovery week

After a half or full marathon. Coaching practice, not trial data; a marathon may need 2–3 weeks before hard training.

Any pain from the soreness-or-injury table: stop running and get it checked.

Cold and contrast water protocol

For tournaments, stage races or back-to-back hard days; not after strength sessions in a muscle-building phase.

Cold-water immersion
  water     10-15 C (bath with ice, or cold sea/lake)
  depth     waist to chest, seated
  time      10-15 min (start with 5 if new)
 
Contrast water therapy
  hot       ~1 min at 36 C or warmer (38-40 C tub or shower)
  cold      ~1 min at 10-15 C
  repeat    equal hot/cold, up to ~15 min in total
            (finish on cold after training,
             on warm before bed)

Caveats:

• May blunt strength and muscle gains (Roberts 2015): keep it away from lifting days if hypertrophy is the goal.
• Heart disease, high blood pressure, Raynaud's or cold urticaria: ask a doctor first. Never immerse alone in open water; get out if shivering hard or numb.
• Re-warm before exercising again: cold legs are slower and weaker (Racinais 2015).

Sore or injured: decision table

Use on the morning after, before a planned session.

References

• Garber CE et al., ACSM position stand: quantity and quality of exercise (opens in a new tab), Med Sci Sports Exerc (2011): flexibility frequency, holds, volume and PNF
• Behm DG et al., Acute effects of muscle stretching on physical performance, range of motion, and injury incidence (opens in a new tab), Appl Physiol Nutr Metab (2016): stretch dose and performance
• Afonso J et al., Strength training versus stretching for improving range of motion (opens in a new tab), Healthcare (2021)
• Herbert RD, de Noronha M, Kamper SJ, Stretching to prevent or reduce muscle soreness after exercise (opens in a new tab), Cochrane Database Syst Rev (2011)
• Dupuy O et al., An evidence-based approach for choosing post-exercise recovery techniques (opens in a new tab), Front Physiol (2018): meta-analysis ranking recovery methods
• Davis HL et al., Effect of sports massage on performance and recovery (opens in a new tab), BMJ Open Sport Exerc Med (2020)
• Wiewelhove T et al., A meta-analysis of the effects of foam rolling on performance and recovery (opens in a new tab), Front Physiol (2019)
• Brown F et al., Compression garments and recovery from exercise: a meta-analysis (opens in a new tab), Sports Med (2017)
• Machado AF et al., Can water temperature and immersion time influence the effect of cold water immersion on muscle soreness? (opens in a new tab), Sports Med (2016)
• Versey NG, Halson SL, Dawson BT, Water immersion recovery for athletes (opens in a new tab), Sports Med (2013): cold and contrast protocols
• Roberts LA et al., Post-exercise cold water immersion attenuates acute anabolic signaling and long-term adaptations in muscle to strength training (opens in a new tab), J Physiol (2015)
• Lilja M et al., High doses of anti-inflammatory drugs compromise muscle strength and hypertrophic adaptations to resistance training (opens in a new tab), Acta Physiol (2018)
• Lipman GS et al., Ibuprofen versus placebo effect on acute kidney injury in ultramarathons (opens in a new tab), Emerg Med J (2017)
• Walsh NP et al., Sleep and the athlete: narrative review and 2021 expert consensus recommendations (opens in a new tab), Br J Sports Med (2021): athlete sleep needs, naps, hygiene
• Watson NF et al., Recommended amount of sleep for a healthy adult (AASM/SRS) (opens in a new tab), Sleep (2015)
• National Sleep Foundation, Sleep duration recommendations (opens in a new tab): 7–9 h for ages 18–64
• Mah CD et al., The effects of sleep extension on the athletic performance of collegiate basketball players (opens in a new tab), Sleep (2011)
• Plews DJ et al., Training adaptation and heart rate variability in elite endurance athletes (opens in a new tab), Sports Med (2013)
• Buchheit M, Monitoring training status with HR measures: do all roads lead to Rome? (opens in a new tab), Front Physiol (2014)
• Racinais S et al., Consensus recommendations on training and competing in the heat (opens in a new tab), Sports Med (2015)
• Cleveland Clinic, Delayed onset muscle soreness (opens in a new tab): timeline and when to see a provider
• CDC/NIOSH, Signs and symptoms of rhabdomyolysis (opens in a new tab)