A Runner's Guide to a Healthy Immune System: COVID-19 Edition

The truth about the coronavirus pandemic is one that’s hard to believe. While this disease continues to spread, people all around the world are wondering how the massive changes are going to affect their lives. We are already getting a glimpse of the effects on society—closed restaurants, bars, and venues, canceled events, and limited interaction with friends and family. The effects on the economy don’t seem so big now, but as the pandemic continues to spread, the shut down of everything around the globe, including our very own jobs, is going to have a major impact on our individual incomes and economics as a whole. I mean, have you seen the stock market recently?!

As athletes, we should already treat our immune system as a priority to our health for two reasons: 1) We enter an immunocompromised state every time we train intensely, and 2) Getting sick keeps us from our regular training schedules. Most people don’t realize that it takes more than popping a vitamin C supplement every day to keep our immune systems healthy. Our sleep patterns, diet, training regimen, stress levels, and hygiene all play a big role in immune health. During a crisis such as what the world is going through now with COVID-19, we have to pay even more attention to each factor.

Diet

We all know how important a healthy diet is in general but it’s actually specifically linked to our immune function. Our immune system relies on white blood cells to create the antibodies that fight off bacteria and viruses and, believe it or not, certain foods can impair this white blood cell function. Studies have shown that a high fat diet can weaken the immune system. You may have read that a full-on plant-based diet is the way to go, but this is mainly due to the fact that plant-based diets generally have less dietary fat and more fiber—two factors that help improve immunity. You can still eat a high fiber, low fat diet and not specifically be plant-based. Loading up on fruits and veggies is also key to protecting immune health, since they are full of vitamins and minerals.

Sleep

The immune system is pretty complex, and so is the link between its health and our sleep patterns. The basic premise is that with sleep deprivation, our T-cell development is diminished. T-cells are the soldiers of the immune system that attack bacteria and viruses, and help keep us from getting sick. On top of limiting T-cell growth, sleep deprivation increases inflammatory cytokines in the immune system, leading to the development of colds and flus from the viruses that could not be fought off by the T-cells. Sleep is also when we experience our highest fever during illness. We tend to think fevers are a bad part of being sick, but it’s actually our bodies way of fighting off infection. If we don’t get good quality sleep, we can end up with a longer dose of the flu or seasonal cold. Aim for 7-9 hours each night for a stronger immune system.

Supplements

It is not absolutely necessary to take vitamins and other supplements every day in order to be healthy. If you regularly eat a wholesome diet—the right amount from each food group, then you most likely get all of the nutrients your body needs. The problem is the majority of people do not eat a wholesome diet, so taking a daily dose of the right vitamins is essential to good health and organ function. For immune function in particular, a good starting point is adding in vitamin C, zinc, and magnesium. One nutrient that is often overlooked by athletes is glutamine. This vital amino acid works directly with immune cells to fight off infection. Our body naturally produces it already, except that during times of stress, less glutamine is produced. This happens during both physical and emotional stress—intense training, sickness, cancer treatment, or even simply just being mentally stressed on a daily basis from work and family obligations. It can be helpful to add in a glutamine supplement after hard training sessions, especially during cold and flu season.

Training During the Outbreak

How many of us have had to change our training plans because either our local running routes have closed or our cities have gone on lockdown at this time? If the case is that you cannot run outside, then there are other options to get in your endurance training. Of course if you have an at-home treadmill, you are saved—you can keep your same training plan as if there was no crazy outbreak. Most of us, though, don’t have this luxury so we need to find another way. If you live in an apartment building, run laps through the parking garage. It’s not only a way to keep up your training program, but you get the added bonus of working on a hilly route!

If you are heading outdoors for your run, do your part and practice social distancing (6 feet apart from anyone!) and good hygiene. Here are some tips to follow to help keep you at low risk of catching and/or spreading any viruses:

✖️RUN SOLO - stay away from group runs, even if you think you are all healthy. Remember you can be carrying the virus around without knowing (zero symptoms!).
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✖️Don’t drink from water fountains - they are rarely cleaned and you can’t count on absolutely no one having put their mouth on the spout, and some people even spit in the fountains too! Just deal with carrying your own bottle for now.
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✖️Keep social distance - 6 feet away from every person! If you have to pass someone, try to hold your breath for a few seconds and look the other way.
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✖️Wash your hands immediately when you get home and get out of your run clothes—you don’t know what has dropped onto you while running.
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✖️Stay hydrated ALL DAY & keep a healthy diet—As stated above, this helps keep a strong immune system!

At-Home Workouts

If you can’t run outside, lack a parking garage, and don’t have enough space to jog around your home, it’s okay ! Don’t worry about losing fitness or getting out of running shape! There are plenty of exercises you can incorporate every day that will keep you in good form. You can make it a goal to maintain your endurance and strength as much as possible by combining a mix of moves. Thankfully you can still place orders online for workout equipment. My go-to tools are resistance bands and medicine balls. Click here to shop these and so many other options! To get the best out of your workouts, make sure to incorporate short rest breaks and keep your heart rate up as if you were running. Explosive moves such as plyometrics are extremely useful for runners and torch more calories than static moves. Try to keep your body moving for the same amount of time you usually run every day.

We are all hoping this virus will get under control within a matter or weeks, so it won’t be long before you can get out for a run again! The positive side of switching up your program for the time being is that you can give your body a break from the constant pounding of running and work different muscle groups. You’ll be surprised how much it will help with your form, strength, and pacing once you’re back out on the road! Endurance may lack bit when getting back into it, but it’s a part of fitness that quickly returns after just a few weeks off. The key is to keep your body moving!

Sources

1. Berenbaum, F.; van den Berg,W.B. Inflammation in osteoarthritis: Changing views. Osteoarthritis Cartilage 2015, 23, 1823–1824. 

2. Rinninella E, Cintoni M, Raoul P, et al. Food Components and Dietary Habits: Keys for a Healthy Gut Microbiota Composition. Nutrients. Published online October 7, 2019

Running After a Race: The Reverse Taper

After several months of dedicated training, race day finally arrives and it is time to showcase all of that hard effort by running 26.2 miles. You finish the race, refuel with the goodies provided at the finish line, and feel accomplished. But now what? Whether you have an amazing race and set a personal record or have a disappointing one, your body goes through the same workload. The biggest mistake most marathoners make is not giving their bodies enough recovery time after the grueling training months and a demanding race.

After getting used to running most days of the week, or everyday for some, it is not the easiest task to take time off. It ends up being unenjoyably miserable and creates a sense of not feeling like oneself even after just a few days. If you had an amazing race and set a PR, you will feel anxious to continue the streak and get back on the training wheel as soon as possible. On the opposite spectrum, if the race did not go so well, you may feel like you need to start harder training right away, or worse—feel like you don’t deserve much time off. But this break is a very important step to improve performance for the next race.

Why Do I Need Such a Long Break?

The marathon and all of those hard training sessions damage the body in so many ways. Of course, if you trained properly, gradually increasing mileage over time, taking rest days as they should be, and fueling properly, the damage to the body is reversible and not detrimental. You do not have to be an elite athlete training 100+ miles per week to get this damage. Since most plans go up to twenty miles at the most training for the marathon, the extra six miles completed at the race, with most likely faster paces, is enough to damage the body just on race day alone.

Muscle Damage

The most obvious damage is done to the muscles. The significant amount of inflammation accumulated in the body after hard training runs and races is a normal process. The temporary inflammatory response to training is necessary in order to improve different fitness components such as strength, stamina, and VO2 max, but only if proper recovery is included in the mix. If you do not let your body recover effectively after a hard workout, then the next hard workout will only pile on more inflammation. Eventually, this stacking on of inflammation will turn into chronic inflammation and lead to injury. The key is to recover properly from every hard workout, especially the hardest workout in the entire plan—race day.

Cellular Damage

There may be times where you run a race, and do not even feel sore afterwards. This is probably the most dangerous time because it will be more likely that you will return to harder running too quickly. Although one may not feel sore or fatigued following a race, it is important to note that the race still induced muscle damage. Creatinine kinase (CK) is a substance that is measured in the blood that indicates skeletal muscle and cardiac damage. Increases in CK in the blood are usually brought on by intense or prolonged exercise, especially in the case of eccentric-type exercise, such as running downhill. Some studies show that this increase can last 3-4 days post-race, while others show it can take longer than seven days to bring these levels back to normal. Given this information, it is important to make sure to not judge your recovery time on how sore you are from your race.

Immune Suppression

Yet another reason a good break after racing is recommended is the impact of hard training on the immune system. The tissue damage that occurs during training and racing leads to the production of cytokines, which are basically substances secreted by the immune system that affect other cells in the body. This development of cytokines then increases the lymphocytes responsible for suppressing immunity. This process is what makes athletes, especially endurance athletes, more susceptible to infections. Although you may not get sick right after racing, this bodily response to the months of hard marathon training will increase your risk of getting sick and having to put a break on your training plan later down the line.

Reverse Taper

A good method to determine your plan to returning back to running after racing is to simply take your taper plan from before your race and reverse it. If your training plan called for a two week taper, then the reverse taper would also be two weeks in length. The few days leading up to your race were mostly easy, short runs, so the first few days back to running should be the same. A few speed sessions fall within these two weeks as well, but overall the mileage is much lower than peak mileage. The third week after the race is finally a good time to start weaning back into the type of running you were doing before. Of course if you follow this approach and your taper was longer, say three weeks, then this plan will take three full weeks until you are back to your prior training level.

It is a good idea to include some light strength training by week two to slowly begin getting your muscles used to exercising. It is important to keep these strengthening exercises similar to what you were doing before. Flexibility exercises and massage/foam rolling should begin as soon as possible to help keep sore and tight muscles flexible and circulated.

You Won’t Lose Fitness

During the reverse taper, runners feel they will lose fitness and get out of shape. There are several studies out there concluding that there is a minimal drop in fitness levels within the first couple of weeks of inactivity. VO2 max is a main indicator of fitness in athletes. It is the measure of the maximum amount of oxygen one is able to utilize during intense exercise. Within the first week of inactivity, there is an insignificant drop in VO2 max (up to 3%), and it will go as high as a 6% drop after two weeks. This is for athletes who decide to take the weeks off completely, instead of incorporating easy runs and other cross-training. Therefore, the drop is even less for those who get back into those easy runs within the first few days as explained above.

The reverse taper is an excellent strategy to use when recovering from a marathon. It lets you continue your running while giving you ample time to rest and incorporate other recovery methods such as massage and cross-training. Not planning adequate time after racing will only lead to overtraining syndrome and a higher risk of injury. It is important to listen to your body during these few weeks post-race and gradually increase mileage. A proper break from intense training will only lead to better performance in your next race!

Sources

Hikida RS, Staron RS, Hagerman FC, Sherman WM, Costill DL, Muscle Fiber Necrosis Associated with Human Marathon Runners, Journal, Oct 16, 2019

Marianne F. Baird, * Scott M. Graham, Julien S. Baker, and Gordon F. Bickerstaff, Creatine-Kinase- and Exercise-Related Muscle Damage Implications for Muscle Performance and Recovery, Journal, Oct 16, 2019

Lakier Smith L., Overtraining, Excessive Exercise, and Altered Immunity: Is This a T Helper-1 Versus T Helper-2 Lymphocyte Response?, Journal, Oct 16, 2019