18 May, 2018
Health & Wellness

The Best Pre and Post-Workout Foods, According to a Registered Dietitian

18 May, 2018

Unsure of what you should be eating before or after a heavy gym session or workout? We reached out to a registered dietitian for her advice…

Looking to shed a few pounds, wanting to stay in shape in preparation for summer, or simply wanting to feel great after a sweaty workout? You know eating well is a part of a healthy lifestyle, along with regular physical activity, but figuring out what to eat and when to eat before and after a workout is an art and a science. Read on for the top tips from a registered dietitian.

Read more: How Hard is it to be Vegan in Hong Kong?

Before Your Workout:

Pre-workout smoothie

Grab a bite

When you are incorporating exercise as part of your weight loss or weight maintenance regime, timing of your meals and snacks is essential. As a general rule of thumb, grab a bite at least one hour to three hours prior to your session. If you eat right before your routine, you may not perform as well as you hope because your body is focusing on using energy to digest the food that you just ate. Eating too close before to your workout may also give you stomach upset.

Depending on the time of the day that you go to the gym or engage in physical activity, you may also need to play around with the timing of meals. For example, if you are an early riser, you may not be in the mood for a full breakfast before your exercise routine, so you may want to grab a small morning snack, such as a smoothie with fruits and chia seeds, or a small bowl of oatmeal with fruit prior, and a full breakfast after your workout. If you typically exercise later in the day, have a snack an hour prior to your workout.

Read more: A Registered Dietitian’s Guide to Eating Out (and Still Enjoying Yourself) in Hong Kong

Go for the carbs

Contrary to the popular belief, carbs are actually good for you, especially when you engage in exercise. Carbohydrates are broken down into its building blocks, glucose, which are taken up by the muscle cells. The muscle cells then use glucose as a source of energy to fuel your workout. The more strenuous your workout is, the more energy (i.e. carbs) you will need. Going for carbs that are easily digested before your workout may help boost your performance.

Here are some examples of carb-loaded foods that you can enjoy before your workout:

  • Bread
  • Oatmeal
  • Fruit
  • Greek yogurt (which also includes protein)Pre workout protein

Don’t forget the protein

While carbs are important, don’t forget about protein. When your muscles are working, small tears within the muscle fibers are inevitable. That’s where protein comes into play: it helps to repair and rebuild muscles. When you eat protein along with carbs before your workout, you will not only have the extra energy, you will also feel more satiated than when you only eat carbs alone.

Some examples of protein-rich foods that you can pair with carbs before your workout:

  • Peanut butter
  • Hardboiled eggs
  • Milk
  • Greek yogurt
  • Nuts and seeds

A complete snack consists of at least two of the four food groups, such as bread from the grains and peanut butter from meats and alternatives. If you are trying to lose or maintain weight, opt for a complete snack that provides 150 to 200 calories.

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Drink up

In addition to eating a sensible amount of carbs and protein before a workout, you also want to stay hydrated to avoid dehydration, which can cause muscle cramps. You can easily tell if you are hydrated by checking the colour of your urine. If your urine looks pale yellow, like the colour of lemonade, you are hydrated. On the other hand, if it looks more of a dark yellow, like the colour of apple juice, you may be dehydrated.

There are a number of options to stay hydrated during exercise, but water is the best choice. If you are going to exercise for more than one hour, going for an intense workout, and/or going to engage exercise in a hot and humid environment, you may opt for a sports drink.

While staying hydrated before and during a workout is important, you do not want to over hydrate either. Drinking too much before or during exercise can lead to low sodium levels, also known as hyponatremia. Symptoms of low sodium levels include swollen hands and feet, and weight gain during exercise.

Depending on the intensity and duration of your workout, as well as on how much you sweat, you generally want to drink one (250mL) to two cups (500mL) of fluids four hours before your exercise routine. Two hours prior to your exercise routine and if you have not urinated or if your urine looks dark yellow, drink half a cup (125mL) to one and a half cups (375mL) of fluids. Depending on your workout’s intensity, take sips of water during your routine.

Read more: Gym Intimidation is a Real Thing – Here’s How We’re Dealing With it

After a workout:

Drink water after a workout


Weighing yourself before and immediately after your workout will help determine how much fluids you have lost. Before you weigh yourself, make sure your bladder is emptied. If you lose more than two percent of your body weight, you will have to replenish your fluids. Depending on your how much weight you lost, drink two (500mL) to three cups (750mL) of fluids for every pound of weight lost. If you have gained weight after the workout, it means you drank too much. Like before and during your workout, water is still the best fluid choice but you can also consider sports drinks.

As mentioned above, you can also use the colour of your urine to determine your hydration status and see if and how much you need to rehydrate. Note that weight loss immediately after a workout is fluid loss, and not fat loss. Be patient with fat loss as it takes time to trim the unwanted fat, anywhere from days to weeks and months.

Read more: Give Your Immune System a Boost with These Nutrients

Refuel within 20 to 30 minutes

Your body worked hard and used the energy stored. You want to make sure your body is refuelled with energy to carry on with the rest of the day. Within 20 to 30 minutes of post-workout, eat a light snack. Like your pre-workout snack, go for one with carbs and protein that provides 150 to 200 calories. Some healthy and on-the-go snack choices include:

  • Trail mix
  • Bread with nut butter
  • Cheese and crackers
  • Hummus and pita bread

Be sensible

Having a snack after your workout to is refuel your body. It does not mean that you should go all out to indulge, as you will only put your workout efforts down the drain. Be sensible with how much you eat after your workout to avoid ingesting extra calories. Skip the energy bars which are loaded with sugars; instead, go for the lighter snacks like the ones mentioned above.

Read more: Successful Hong Kong Women Share Their Morning Routines

Best meal to eat after a workout

Full meal 3 hours later

After your light snack, opt for a full meal at least three hours later. If your goal is to lose or maintain weight, keep your post-workout meal around 500 calories. A balanced 500-calorie meal typically consists of foods from at least three of the four food groups: vegetables, whole grains like quinoa, buckwheat, and brown rice, and meat and alternatives like lean meats, fish, beans and tofu. To avoid any unnecessary calories, be mindful of how the meal is prepared. Your best bet is to prepare a homemade meal so that you can control how much oils and fats, sugar and salt you add as part of the meal. If you are eating out after your workout, you may also want to choose foods that are prepared with little fats, sugar and salt. For more details on how to eat smart while eating out, check out the feature, A Registered Dietitian’s Guide to Eating Out (and Still Enjoying Yourself) in Hong Kong.

Here are some easy to prepare snack and meal ideas:

Easy to prepare snack and meal ideas

Bottom Line

Engaging in regular physical activity will not only help you stay in shape but also boost your energy levels and give you a happier state of mind. Nourishing your body before and after a workout is also key to maintaining a healthy physique. What is mentioned here are only guidelines and may or may not work for everyone. Depending on the nature of your workout, its intensity, and the number of times you exercise in a week, your caloric and fluid needs may differ from others. If you are looking into staying in shape, you may wish to work with a registered dietitian who can guide you on what to eat and how much to eat while you are incorporating exercise as part of your healthy lifestyle.

Read more: These are the 10 Biggest Wellness Trends for 2018

Featured image courtesy of Pexels, image #1 courtesy of Unsplash, image #2 courtesy of Pexels, image #3 courtesy of Unsplash, image #4 courtesy of Unsplash

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