What is a Recovery Run and Why Should You Do Them?

Recovery Runs: What are they and why should you do them?

Recovery runs are the easiest runs you’ll do all week. They are short runs done at a VERY easy effort. Leave the running watch at home and slow down to smell the roses!

Whilst recovery runs are the easiest runs on your program, it doesn’t make them any less important than any of the other types of runs you’re doing – long runs, tempo runs and interval training. Skipping them is not an option for anyone serious about getting faster. Recovery runs allow you to run more, without increasing your risk of injury. And up to a point, the more you run, the faster you’ll be in your goal race.

Recovery Runs Can Make You a Faster Runner

Training Effort

To understand the importance of the recovery run, we need to understand that there are two somewhat competing elements of the training equation that make us faster: training intensity or “stress”, and training volume.

Your body will be under stress in sessions that test your current fitness levels – long runs which push you further than the last long run, and higher intensity runs such as interval sessions, hills sessions and tempo runs. A session that leaves you pretty tired is a session that’s stressed your body. And that’s a good thing. When you place a training stress on your body, and you’re regularly stressing it, pushing the limits of your fitness, your body adapts by getting stronger, ready for the next bout. With consistent well-planned training, you’ll be better able to resist the causes of fatigue in your next session, and ultimately your goal race. The gains made from session to session may be so small that you don’t notice them, but over time, they add up.

Training Volume

Increasing your training volume-the sheer amount of running you do- will make you faster, even if you never do any hard workouts such as speed sessions or long runs. The reason is that running efficiency increases with training volume.

Running is a motor skill. And like any other motor skill, to do it, your brain and muscles need to communicate. Training helps you do develop efficient communication between your brain and your muscles. The more efficient the communication, the faster you can run for a lower energy expenditure. The amount of energy expended for a given speed, is called running efficiency, or running economy. Practicing running improves the communication between the brain and the muscles. You develop your skill as a runner through repetition. Like any other motor skill, like patting your head and rubbing your tummy at the same time, the more you do it, the better you will be at it.

From the point of view of getting faster, a high volume of training, as well as training that places a lot of stress on your body, are equally important. But… you can’t run like a bat out of hell every time you run and keep piling on the volume at the same time, so how do you increase your running volume (and therefore your running economy) without upping the risk of injury?

Enter the Recovery Run

Throwing recovery runs into your training program allows you to increase your total volume. They are very easy. You should not need more recovery after a recovery run. They allow you to get the most out of your other workouts – speed sessions, long runs, tempo runs – whilst also increasing the amount of time you are running for. That is, the amount of time you are practicing running, and therefore getting better at it.

Fitness adaptations occur relative to how much time you spend exercising past the point of initial fatigue. (So, when the going starts to get a bit tough, is when the real fitness adaptations start to occur). Your harder runs that challenge you either by their pace or duration take you well beyond that point of initial fatigue. You do spend some time at the beginning of the session to get to that point though.

Recovery runs, strategically placed in your program, are performed entirely in a fatigued state – they therefore boost your fitness despite being shorter or “easier” than your harder key workouts. Because you’re mostly doing them in an already fatigued state, recovery runs will often not feel easy.

In any kind of workout, once you reach a fatigued state, the brain will alter the pattern of muscle recruitment. It tries to avoid using the tired muscle fibres and instead recruits fresher muscles that are not so tired, simply since they are not the preferred muscle fibres used to perform that movement

Essentially the brain is forced out of its “comfort zone” of normal muscle recruitment. If you want to keep running at the same pace, the brain needs to circumvent the tired muscles to enable you to recruit new fresh muscles.  By placing your body under stress, either in a hard workout or in a recovery run when you are already fatigued before you start, you force your brain to find more efficient ways to recruit muscles. You’ll be running more efficiently.

Tips for When to Use Recovery Runs

Generally, if you run within 24 hours of a hard workout, the second run should be a recovery run.

If you’re running 3 times a week, generally you don’t need to include recovery runs. Each workout can be a harder workout, with a rest day in between. Note this does not apply to beginners, people coming back from injury, or coming back from a break in training.

Experienced runners won’t need to include recovery runs in the base phase of their training when they are not doing super exhaustive long runs, or high intensity workouts. When you do get to that stage, you do want to include recovery runs in your program-the ratio can be as high as 1 recovery run for each hard workout you do – this will depend on how frequently you run – sometimes you’ll have a rest day after a hard workout, rather than a recovery run.

For the most part, recovery runs won’t be fast or long. The actual length will depend on how much mileage you’re already doing. Recovery runs should be easy enough and short enough not to leave you feeling tired for your next hard work out.

You won’t always feel bad during a recovery run (good to know).  Even if you feel like you’re running very easy, don’t push the pace. Keep it at conversation pace. If you can’t belt out the first verse of the national anthem, then you’re running too fast.

We love helping runners achieve their goals. If you really want to get your training on steroids (metaphorically speaking) you need to find out about our online coaching. 

Anti-Inflammatories and Running

anti inflammatories and running

Why does inflammation get such a bad wrap?

Inflammation. At its worst, it can stop you in your tracks. But if your tendency is to reach for the Voltaren at the first slight twinge or sign of inflammation, you might like to consider what purpose inflammation actually serves…

And you also might like to consider that Volaren, Ibiprofen and other Non Steroidal Anti-Inflammatory Drugs (NSAIDs) can limit the benefits you gain from training!!

Sometimes it’s tempting for runners with a niggling injury to take anti-inflammatories to get them through their key long runs leading up to a race, but studies have shown that this can be counter-productive.

What Role Does Inflammation Play?

Inflammation is a protective mechanism your body uses to remove harmful stimuli and start the healing process. After a hard workout, specific cells are activated to increase blood flow to the muscles used in the workout. This increased blood flow also occurs in the initial stages of an acute injury. It produces swelling and stimulates the nerves that cause pain.

Inflammation is the beginning of the healing process, and it’s super important for recovering not only from injury, but from normal bouts of training as well. Without inflammation, your recovery from each bout of exercise (or from injury) would be much slower.

But what about R.I.C.E? Isn’t the idea to reduce inflammation?

Good point. The standard procedure for injuries which provoke the inflammatory response, such as a sprained ankle, is Rest, Ice Compression and Elevation. The R.I.C.E protocol is designed to REDUCE inflammation, so if inflammation isn’t bad, and it’s the body’s natural response to injury, why do we want to reduce it?

Firstly, we need to understand that the inflammatory response is non-specific. Incredible as our bodies are, we don’t seem to have evolved to be able to differentiate between the response needed to cope with a potentially deadly pathogen such as a bacteria or virus entering the body, and the response needed to help a sprained ankle to heal.  The overriding function of the body is to keep itself alive. This takes precedence over all else. If a massive inflammatory response is required to neutralise potentially deadly pathogens, from the point of view of survival, it’s of little consequence that your ankle might lose some functionality due to inflammatory overkill after injury. Better to have slight loss of function of the ankle, than be dead.

One of the things inflammation does is put up a barrier around the area of infection or injury– whether that is around a sprained ankle, or around an area where a pathogen has set up house inside the body. This slows the passage of pathogens or toxic products into the surrounding healthy tissue. In the case of a sprained ankle, too much inflammation can actually inhibit the repair of the tissue. Too much swelling in the injured area might make it difficult for blood to diffuse into the cells, resulting in a lack of oxygen and further damage, so reducing the inflammation makes sense. One of the other things ice will do is slow the metabolic rate of the cells in the area, which temporarily decreases the cell’s requirements for oxygen.

Why exercise produces inflammation

When you run (or perform any other form of exercise) you create small micro tears in your muscles. The higher the intensity of the workout, the more forcefully you are contracting your muscles, and therefore the more damage you cause.

The micro-tears cause your body to set up an inflammatory response. Substances such as blood, oxygen and nutrients are shunted to the damaged area for the healing process to begin. This micro damage is not enough for the body to over-do the inflammatory response, but it can be enough to cause pain and discomfort.

When you should NOT take anti-inflammatories, and why. 

If you’re interested in getting your body into the best shape possible, you shouldn’t take NSAIDs in the following circumstances:

  • To reduce the pain of a current injury to get you through a long run
  • During a race
  • Prophylactically – that is to prevent the anticipated pain of a sporting endeavour, or to prevent injury

NSAIDs can reduce the training effect

If you’ve got a niggling ITB, or a bout of bursitis for example, something that’s not too bad, but there all the same, it’s very tempting to pop a pill to get you through your scheduled long runs. You fear not getting in the mileage you’d intended will affect you poorly on race day. And it might…

But washing down a couple of anti-inflammatories with your pre-run hydration isnt’ the answer. A 2010 study by Japanese scientists showed that whilst anti-inflammatory drugs will indeed facilitate a longer distance run, the taking of the drug cancelled out the training effect that could be achieved from the longer distance. If you run with NSAIDs coursing through your veins, the training adaptation you could expect from that run will be diminished.

In other words, by taking the drug to enable you to run further, your body is not able to make use of the longer distance you run. You’re wasting your time. You’d be better off running within your pain threshold and gaining the training benefits from that. A longer run on NSAIDs will not see you get as fit as if you were running without NSAIDs, so you may as well run for less time and enjoy the training benefit.

Taking NSAIDS for long periods of time can have adverse effects on your gastrointestinal and cardiovascular system. These adverse effects become more pronounced with longer duration of use. Taking NSAIDS before physical activity can mask pain and cause an injury to get worse, or mask the pain of a developing injury. Anti-inflammatories may also impede the synthesis of collagen, that gives strength to tissue. Some of the chemical substances naturally occurring in the body which NSAIDS inhibit are important in the response and adaptation of muscles and other connective tissue to loads placed upon them. Taking NSAIDS can reduce the strength gains from training.

Taking NSAIDs may not reduce your perception of pain

Using NSAIDS prior to a race to prevent the pain of racing has been shown to be ineffective. This study on athletes competing in a 160k endurance run showed the ibuprofen use did not alter muscle damage or soreness. That’s right, taking anti-inflammatory drugs before the race made no difference to the athlete’s perception of pain. The perceived exertion of ibuprofen users and non-users was very similar. On the Borg scale, the control group rated their exertion slightly lower than the anti-inflammatory group (14.5 vs 14.6), and interestingly, and interestingly, Ibiprofen use was related to increased endotoxemia and inflammation.

When is it good to take anti-inflammatory drugs?

During the initial stages of an acute injury (like a muscle strain, sprained ankle, or sudden onset of an inflammatory conditions such as tendonitis or bursitis), NSAIDS are likely to facilitate healing. Taking NSAIDS for the first 2-3 days is appropriate, but after that, you may be better off letting the body’s own natural healing take over.

There are of course other circumstances when NSAIDs are necessary, but that’s best left up to your medical practitioner to decide

To Cool Down or Not To Cool Down?

Should you cool down after running?

Should you cool down after running?  That is  a very good question…and one which has not been satisfactorily answered to date!

Traditionally, the cool down has included some two to twenty minutes of running (or run/walking) at an intensity much lower than the main part of the workout, as well as some stretching of the main muscles groups used.

It’s an established “fact” that the cool down is an important part of your training session. Cooling down, the narrative goes, will help you to recover quickly and get your body ready for your next bout of exercise.


It turns out, there’s not a great deal of evidence to support this. In fact, there’s been very little scientific research done on the topic at all.

What a traditional cool down after running will do for you.

  • Speed up the rate at which lactate is cleared from the bloodstream. (Note it is lactate which is produced during exercise, not lactic acid)
  • Reduce the risk of dizziness and fainting
  • Help to prevent that post-exercise chill
  • Give you a feel-good factor whilst you’re stretching – it always feels kinds of nice to stretch those muscles
  • Put a mental punctuation mark at the end of your session, separating it from the rest of your day, and mentally signal you’re ready to get back to the daily grind!

What a traditional cool down most likely won’t do for you

  • Relieve muscle tightness
  • Relieve muscle soreness
  • Improve your performance in a subsequent bout over the next few days, unless it is on the same day.

Let me explain…

Lactate Clearance

Cool downs have been proven to clear lactate from the bloodstream more quickly than stopping moving completely after a run. This has, until fairly recently, been assumed to be a good thing, as lactate (or more commonly incorrectly referred to as lactic acid) has been blamed for the muscle burn you feel when you’re fatigued, as well as the post exercise soreness you might feel a day or two later. It’s now known that it’s not lactate, but hydrogen ions which cause that dreadful muscle pain and weakness whilst you’re exercising at a high intensity.

Whilst a cool down might clear blood lactate more quickly, that’s not going to have an impact on how you feel. It’s also only going to speed the process up by 30 minutes or so. Lactate will clear from your bloodstream within about an hour post exercise anyway. There’s also no evidence to suggest that clearing lactate more quickly after a run will aid in recovery or performance except in specific circumstances (more on that later).

Muscle trauma is the real cause of post exercise pain

Post exercise soreness is not caused by lactate. It is more likely due to the micro tears to your muscles which are caused by working out. These microtears are not something you should be alarmed about. They are how your body adapts and rebuilds to become stronger.

And there’s doubt as to whether a cool down and stretch actually relieves muscle tightness. Studies amongst soccer players found that cooling down after training had no impact on their performance, flexibility or muscles soreness the next day after training.

If you’re looking at reducing delayed onset muscles soreness, a good warm up is the way to go. A study published in the Australian Journal of Physiotherapy showed that you can decreased delayed onset muscle soreness by warming up, but not by cooling down.

Cooling Down can help you perform better in a subsequent same-day exercise bout

One study amongst cyclists did show that using a cool down after a 30 minute time trial gave a performance advantage in a subsequent time trial on the same day over the control group who did no cool down. It seems if you’re planning on competing twice in one day, or doing two quality workouts in one day, then cooling down might be useful.

Preventing Dizziness

One thing a post run cool down will do for you is help to prevent blood pooling in your legs. When you exercise, a lot of oxygen rich blood is shunted to the working muscles to transport oxygen and other nutrients needed for energy production and muscle contraction and relaxation.  If you stop still after you finish running, you run the risk of blood pooling in your lower legs, and possible dizziness or even fainting.

If you’re a particularly fit athlete, this could be more of a problem. Your heart rate will return to normal pretty quickly once you’re at rest, meaning it will be pumping less blood back up out of your legs.

Exercising for several minutes at a very low intensity at the end of your workout will mean your heart rate will remain elevated for longer, hence deoxygenated blood will be pumped out of your legs and back to the heart more quicly. The muscular contractions in your legs will also help to get that excess blood back out of your legs to where it should be.

It’s unusual for anyone to stop completely still after a run or a race. Most race finishes are set up so that you keep shuffling through the drinks stations etc for a couple of minutes. You might have a little sit-down after that, but then there’s finding your friends, getting home, going for coffee, so you’re really still moving at a low intensity for quite some time after a race. Same with finishing a run. How often do you have the luxury of putting your feet up and flicking through a magazine when you finish a run? Me… pretty much never. I’m often straight in from a run, getting dinner ready, doing the washing, getting kids out the door…

Post Run Chill

During a race the body is working hard to cool itself. This built in cooling system keeps up for some time after the race, even though you’ve stopped running and are not generating extra heat any more. The more gradual drop in body temperature a cool down encourages will help to prevent the chills.

Not cooling down might help to replenish glycogen stores

Lactate is used by the body in a number of different ways, one of which is to fuel your working muscles. Through a series of biochemical processes, lactate is converted to glycogen, which is one of the main sources of energy for muscles. When you finish a workout, particularly one which will have depleted your muscle glycogen stores, you should be trying to refuel your muscles as quickly as possible. One study amongst cyclists came to the conclusion that when the cyclists simply stopped exercising, lactate was turned back into glycogen and stored in the muscles, but when they cooled down, some of the glycogen was used up by the working muscles. It’s possible, that from the point of view of recovery and readiness for the next bout of exercise, cooling down might be detrimental.  Of course, you could counteract this by fuelling well after exercise with a good carbohydrate and protein feed. *********link this to the milkshake thing if indeed there is one on our website -might be in a recovery thing

Why a 10 minute run and a bit of a stretch might still be a good idea

Even though there’s no evidence to show that a traditional cool down actually does all that it’s supposed to do, there might be a couple of good reasons to cool down with a lower intensity run. These reasons have far more to do with training adaptations than recovery or preventing muscles soreness.

In a high intensity workout, the body will produce a lot of lactate. At some point, it will be producing more than it can readily use. By running after the main part of your session is over,  when you have a high level of lactate in your bloodstream, you’ll likely be teaching your body to use lactate more efficient.

Likewise, you could use a slow 15 minute run after a heavy workout to practice maintaining good form when you’re tired. You’ll teach yourself to run more efficiently when you’re tired, so don’t slump and shuffle through your next cool down. Be mindful of what you are doing.


So the good news is, if you really hate cooling down, you’re probably not going to be doing yourself too much harm if you don’t do it, but it’s a very individual thing. If you’re one of those people who swear their muscles ache if they don’t cool down after a run, then keep doing it. It’s not likely to do you any harm.

Do Ice Baths Really Work for Recovery?

Ice baths can help recovery under certain conditions

When my kids were playing in a soccer tournament earlier this winter, they were due to play at least one game a day on 4 consecutive days, and sometimes two. Luckily for them there was a very-cold-unheated-outdoor-in-the-middle-of-a-Canberra-winter pool available for them to use!!

I wasn’t convinced of the value of this cold water immersion, compared to the stress placed on the immune system by running outside half naked in 5 degree temperature to get to the pool, then running back again dripping wet and still half naked. (Apparently it’s illegal to wear trackies and a warm top when you’re meeting your team mates pool side).

I did a little digging around on cold water immersion (CWI), more commonly known as “Ice Baths”, and found some interesting research. Here’s a quick summary.

What is an Ice Bath?

Ice baths come under the umbrella of cold water immersion. They are not actually baths chock full of only ice. That would definitely burn. They are a mix of water and ice, in any kind of vessel big enough to hold a human body, or part thereof. Generally the temperature is around 10 degrees C, although some research suggests that this is not cold enough, and favours a 6 degree submersion.

Why Would You Even Want to Jump Into an Ice Bath?

High intensity sport, or large volumes of low intensity sport, can cause fatigue which can reduce your performance. It can also reduce your ability to train well the next day. The more quickly you can recover from a bout of exercise, the better your next day performance will be, whether that’s in competition or in training.

It’s believed that immersing yourself in cold water post exercise bouts aids in recovery. That’s why you or I might think CWI is a good idea. Our kids…well, they tend to think it’s a good idea when their mates tell them it is.

Using Cold Water Immersion to Reduce Muscle Soreness.

Playing sport hard, long runs, high intensity interval training sessions, or sometimes even a reasonably moderate session of an exercise that is new to you, can leave you with what’s known as delayed onset muscle soreness (DOMS) aka “sore muscles”

Potentially, CWI can reduce this muscle soreness. The benefits include reduced pain at rest, reduced pain when stretching, and an increase in the active range of motion.

There are several mechanisms which might be at play here:

  1. Reduced nerve activity due to the cold temperature, which results in increased pain tolerance (1)
  2. A reduction in swelling due to the blood vessel constriction due to the low temperature (2)
  3. Reduced swelling due to the hydrostatic pressure of water (3)

One study has shown that it’s most likely not the actual immersion in water itself that has the benefit, rather the temperature of the water in which you immerse yourself. Immersion in 6 degree C water was more effective than 10 degrees, and more effective than contrast immersion alternating between 10 degree and 38 degrees C.(4).

Wouldn’t you just know the coldest option would be the most effective?

Does Cold Water Immersion Always Work?

Not necessarily. It appears the benefit of using cold water immersion in reducing muscle soreness only exists in trained athletes, so unless you’re well trained, you can keep the ice firmly in the freezer where it belongs.

CWI is also ineffective in recovering from a new training regime. So if you’re a well-trained runner who does 10k on the rowing machine in the gym, chances are an ice bath won’t help to stop the inevitable muscle soreness you’ll experience.

Will it Improve Your Performance?

There is not a huge amount of research on cold water immersion, despite its popularity as a recovery strategy. Whilst it might reduce muscle soreness, this may not necessarily translate to improved performance.

I took a quick look at eleven different studies which looked at the effect of CWI as a strategy to improve performance. Six of the eleven studies showed the CWI improved performance, but 5 showed either no improvement or reduced performance.

This was of course a small sample of studies, but there aren’t too many studies going around. And that’s the thing. There really isn’t enough research on the strategy to come down on one side or the other.

Patterns in the Research on Effectiveness of Ice Baths

  • Studies which have looked at how well cold water immersion can prepare you for a second bout of exercise on the same day found either no effect or a negative effect on performance. This is probably due to a reduction in nerve velocity and the restriction of blood flow to the muscles.
  • Studies testing the effect on performance 1 to 2 days after the cold water immersion had a tendency to find a more positive result.

Long Term Effects of Ice Baths

Research on the long term use of ice baths suggest that long term, chilling yourself in this manner too frequently could have a negative impact on the way you adapt to exercise.

CWI increases the release of the stress hormones cortisol and norepinephrine for up to 60 minutes after you jump out of the bath. These hormones act to break down the muscles, so this would reduce the body’s ability to adapt to training. And adapting to training is really the whole point of doing it. You stress your body repeatedly, it says “bloody hell, if she’s going to keep doing this to me I’d better get stronger”, and diligently goes about doing just that, getting stronger. But, if your cold water immersion bout is releasing hormones which break down muscle tissue, long term, you’re not going to be seeing the adaptation that you’re training for.

The release of stress hormones could also impair your ability to get a good night’s sleep, and sleep is THE most critical factor in recovering well.

The reduction in swelling which is brought about by ice baths could also have a long term detrimental effect on your fitness. Post-exercise swelling is part of the process that leads to muscle repair and strengthening.

It’s All in the Timing

Whilst there’s still a lot more research needed on cold water immersion and ice baths, a few things are apparent.

  1. CWI can reduce muscle soreness in trained athletes
  2. CWI might improve performance in subsequent exercise bouts which are 1 to 2 days post immersion
  3. CWI is likely to have no impact or could reduce performance on same day subsequent bouts of exercise
  4. Long term use of ice baths and cold water immersion as a recovery strategy is likely to have a detrimental effect on the body’s ability to adapt to training
  5. If you use cold water immersion as a recovery strategy, you should limit its use to times when you really need to recovery quickly for your next tough training session, or for an important event, but you should not use it as a matter of course.
1.  Algafly, A.A., & George, K.P. (2007). The effect of cryotherapy on nerve conduction velocity, pain threshold and pain tolerance. British Journal of Sport Medicine, 41, 365-369.
2. Cochrane, D.J. (2004). Alternating hot and cold water immersion for athlete recovery: A review. Physical Therapy in Sport, 5, 26-32.
3. Wilcock, I.M., Cronin, J.B., & Hing, W.A. (2006). Physiological response to water immersion: A method for recovery? Sports Medicine, 36, 747-765
4. Cold water immersion in the management of delayed-onset muscle soreness: Is dose important? A randomised controlled trial.  Philip D. Glasgow, Roisin Ferris, Chris M. Bleakley