Mini Pause #5: What’s Better: Fasted or Fed Workouts?

Fasted or Fed Exercise?

TL,DR (too long, didn’t read)

Most evidence suggests that fuelling before a workout is better for performance in the gym, and has the same outcome on body composition as fasted workouts. That is not to say that working out fasted is pointless and ineffective. As long as you are fuelling appropriately in the peri-exercise time around your lifts — your body is a genius and knows what to do with the stimulus.

WHY

There are so many of you who struggle with not only what to do in the gym, but what to do in the window that surrounds your workouts.

Fasted or fed training?
Fasted or fed cardio?
What to eat?
When to eat it?
How much to eat?

With conflicting evidence abounding, it can get overwhelming really fast. And based on the comments from a recent Instagram post, you’re also trying to figure out what works, too.

Personally, I used to train fasted (both my lift sessions and cardio) for years, and have since changed my approach.

At the beginning of my fasting journey (when I was completely discounting the fact that I was female) I would work out in the morning and then continue my fast until noon. Needless to say, I was starving, and angry, and as soon as noon came around, I had a very large meal. Larger than what was necessary. The same continued at each subsequent feeding. It was hard for me to admit, but fasting until noon was not working the way I had hoped and the way it seemed to be for many others (mainly men) I admired and respected.

Over time, begrudgingly admitting this was not working well for me, I shifted my fasting window to eat immediately after my workout. I was still fasting for long lengths of time, but the phasic shift to earlier in the day was helpful. This worked well for me for years.

It was only until one of my kid’s soccer practices was moved early in the morning on the weekend that I changed things up again. Since I wasn’t able to get to the gym before his practice, I had the opportunity to experience fed training sessions.

I had breakfast, took him to practice, had another snack, and worked out afterward.

I was shocked at how well I performed. Was it the food? That I had more time to limber up my joints? My core body temperature? I wanted to figure this all out.

WHAT

So in examining this topic, let’s review the literature on the effectiveness of fasted versus fed workouts. Is there a difference?

Fasted Workouts

This meta analysis looked at several studies where the intervention was either:

  • fasted exercise with a standardized post-exercise meal
  • fasted exercise without a standardized post-exercise meal
  • fed exercise with a standardized post-exercise meal
  • fed exercise without a standardized post-exercise meal

What they found was the second intervention (fasted exercise and no post meal) appeared to be the most effective strategy to produce a short-term decrease in energy intake. But there was a catch: it also resulted in increased hunger and lowered energy expenditure afterward.

This is known as metabolic adaptation. If you have a higher energetic expenditure but are not fuelling properly either pre -or post-workout, you might be able to temporarily decrease caloric intake. But, the body will compensate over time by increasing hunger and/or lowering your total energy expenditure. This is the “calories out” part of “calories in, calories out.”

Said another way, aerobic exercise performed in the fasted state with no post-workout fuel induces higher fat burning WHILE DOING THE EXERCISE, but will then correct for energy output after the exercise is finished. This means, there is nothing inherently superior to fasted workouts.

Another study looked at 20 healthy young females and looked at the difference between fasted exercise on body composition. They kept calories constant between the two groups and either gave them a meal before exercise or had them work out fasted and fed them after the exercise was completed. Again, no significant difference was noted between the two groups in terms of body composition. They both demonstrated equivalent weight and fat loss.

Fed State

So here is where it gets interesting! Even though body composition seems to be agnostic to whether you are in a fed or fasted state, there’s a significant difference in performance and repair of muscles when you are fed before exercising.

Specifically, when you consume carbohydrates and protein before a workout, this positively affects muscle glycogen stores. This is going to give you the oomph you need to maintain energy and execution during your lifts. It’s also going to improve the repair of muscles and help to improve the short-term and long-term adaptations to training.

Said another way — being fed before a training session helps with the performance during that session and the repair afterward. I would argue that this speeds up changes in body composition over the long term because it is going to favor muscle tissue performance and repair. The faster you can put on muscles, the better your body composition is going to be.

For those of you wanting to go even deeper, check out this article on nutrient timing, and listen to one of the authors of the paper, Alan Aragon, on my Better! podcast.

HOW

If you want to try fueling before a workout and have been training fasted for years, start small!

Here is a short list of pre-training meals you can experiment with:

  • Add protein to your coffee. I often add a Core Power to my coffee, or I will blend Equip Foods or Schinoussa protein powder into my coffee.
  • Have a banana. It is light enough to avoid that “brick in the stomach” feeling.
  • Have a Protein Shake. (½ banana, scoop of whey protein powder and water)
  • My overnight oats recipe (check it out here)
  • Greek yogurt with some honey and walnuts
  • A few rice cakes with peanut butter and jelly

Personally, I am a creature of habit so it’s either my overnight oats or I add one scoop of whey protein to oats and mix. I eat either one of these options before every lift. When it’s leg day, I will also add a banana into the mix.

This clocks in somewhere between 350-400 calories, which is about right for the length and intensity of my workouts. I would say the bare minimum calories should be around 200, especially if you just starting to experiment with food intake early in the morning.

Many of you work out early, and I do as well. I eat my oats and protein of choice almost immediately after waking and then I get dressed and get to the gym. This buffer gives me about 30-45 minutes from the time I eat to the time I am in the weight room. Precisely about the time those glorious amino acids and glucose are spilling into the blood so I can drive them into my muscles to werk. Not work. WERK.

NOW

Decide on what small meal you are going to try. Tomorrow (or your next planned lift session), wake up and march into your kitchen to eat. Naked if need be — we’re talking about better muscle performance and recovery here! Then go about your regular morning schedule and head to the gym.

Be patient with yourself. It may take a few weeks to adapt to eating on a new schedule. I would choose one food and just have that before your workout for two to four weeks to see if you notice a difference in your performance at the gym.

It may or may not work for you. Either outcome is fine. That you are willing to try different things is what makes you the champion you are.

In this article, I mentioned my two favorite protein powders. Take a look and choose the one that’s right for you: Equip (use code DRSTEPHANIE to save 15%) or Schinoussa.

Question of the Week

Q: What does it mean when I’m spotting before my period?

Spotting outside your bleed week can be unsettling and there are a few explanations for it.

Before we dive in, consider your age, where you are in your cycle, and if you could be pregnant. And a word to the wise: I’ve had several friends in their late 40s get pregnant, so this is something to always rule out!

EVALUATING

Menstrual Cycle:  

  • Ovulation: Not all, but some women will notice some light pink blood mid-cycle around the time of ovulation. The pink color most likely is a mixing of the blood and cervical fluid. It should not be heavy enough to warrant a tampon, a cup or a pad, and this is considered uncommon, but normal.
  • Luteal Phase: This is most common in perimenopause when we see falling levels of total progesterone and estrogen. Lowered progesterone is unable to maintain the endometrial lining and premature shedding of the tissue can occur as it becomes ischemic and dies. Discussing hormone replacement with your provider might be in order here.
  • The spotting prior to bleeding might also be due to an estrogen deficiency or luteal phase defect where the luteal phase is shorter than the follicular phase. Typical diagnostic criteria consider 10 days as a luteal phase defect coupled with elevated FSH and LH. This can be confirmed on a blood test.

Hormonal Birth Control: If you have recently started on any kind of hormonal birth control like pills, patches, injections, or intrauterine devices, you may find you are spotting for the first few month as your body adjusts to its new hormonal environment.

Implantation Bleeding (Pregnancy): If you are pregnant, implantation bleeding often happens in the six- to eight-week mark of your pregnancy. This is right around the time you “should” be getting your period. The fertilized egg is burrowing itself into the womb and can cause noticeable spotting. This is normal, although you might mistake this for your period!

Sex: Penetrative sex can cause some spotting afterward, especially if you are experiencing vaginal dryness. This happens most commonly in perimenopause with declining levels of estrogen leading to reduced lubrication. The friction from sex can cause microtearing in the walls of the vagina. So, either ramp up the foreplay, grab some lubrication, or both.

You can also see some post-coital bleeding from cervical polyps. These are benign growths on the muscular wall of the cervix.

In all of these cases, keep a log of what is happening so you can discuss the specifics with your doctor. You’ll want to note where you are your cycle, how much, how consistent, what colour, and duration of the spotting.

TESTING & NEXT STEPS

I love to run lab tests on myself and patients every six months. This is ESPECIALLY true in perimenopause when your sex hormones can drastically change from visit to visit.

YOUR TURN!

‘ll be answering your questions every week right here in the Mini Pause! Let me know what’s on your mind. I’ll be checking for both questions and feedback at support@drstephanieestima.com.

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P.S.

MISSING LINK: In last week’s Mini Pause, I included a link to a hand-held vacuum I like to use on my mattresses, but the link wasn’t functional. Here it is!

HEALTH TOOLKIT: I’ve put together a toolkit for you on my brand new website. I designed these resources for my Bettys who are menstruating, experiencing perimenopause or have gone through menopause. There are commonalities between the categories and also specifics for each one. Everything I recommend, I use myself. That’s my rule. I invite you to take a look!

Mini Pause #3: Add ‘Exercise Snacks’ To Your Movement Menu

Exercise Snacks: An Easier (Better?) Way to Stick to Your Goals


TL; DR (too long, didn’t read)

Exercise Snacks (exercising in small 5- to 10-minute increments through the day) yield the same, if not slightly better, results than one big session at the gym.   

And we are not just talking about waistline — exercise snacking demonstrates improvement across fasting insulin, fasting glucose, lipids, and cardiorespiraory fitness. They also show a slightly better outcome in body weight and LDL cholesterol!  

WHY

January is a busy month for gyms. If you’ve just joined a gym, or even if you’re a seasoned muscle mommy like me, you may be feeling some of your original New Year’s goals already falling by the wayside. But have no fear — if you’ve set a goal and are having a hard time keeping up with an aggressive gym schedule you’ve set for yourself — I have a solution for you!

Simple exercise snacks.

Since the pandemic, more and more people work from home either permanently or have a hybrid model working from home and being in an office. What has emerged are new work norms that allow you more freedom to find opportunities in your day for movement.  

I’ve always said moving consistently through the day trumps one big workout followed by sitting for 12 hours. And there’s robust scientific evidence to back this up.

WHAT

This meta-analysis looked at 19 studies with a total of 1080 participants. They were looking for studies that evaluated whether one bout (continuous) of exercise was better, worse, or equal to the same exercise broken into smaller pieces through the day (cumulative or what I am referring to as “exercise snacking”).

They controlled for intensity of the exercise, duration, and type of exercise. Said another way: they were looking for the exact same workout either 1) completed in a single session, or 2) broken up into smaller chunks over the course of the day.

Results showed that the exercise snack group and the single bout group both reduced their total body mass, but the exercise snack group fared slightly better. The exercise snack group and the continuous exercise group both improved their LDL cholesterol, with the snackers faring slightly better here as well.

Both groups improved their total cholesterol, high-density lipoprotein cholesterol, triglycerides, fasting blood glucose, and fasting insulin.

Bottom line: both a continuous session at the gym AND exercise snacks can yield comparable results.

There’s mounting evidence that exercise snacks have incredibly positive benefits on your health:

  • like this study looking at exercise snacks on blood glucose levels after a meal
  • or this one on how exercise snacks lower blood lipids after a meal
  • This study showed that 1 minute of all-out sprints (broken down into 3 x 20-second sprints, bookended by 2-minute warmup and cool down) improved cardiometabolic and mitochondrial health AS MUCH AS individuals doing cardio for 45-50 minutes. That’s five times less time and volume!

Pretty compelling, right?

Exercise snacks also alleviate the pressure to get in a big exercise session every day. If you’re able to replicate a 1-hour workout in smaller pieces through the day, the results seem to be equivalent at worst, and superior in terms of body mass and cholesterol levels at best.

HOW

You’ve got two options on how to implement exercise snacks. You can use either option or a combination of both.

  • Option 1: Replace your Gym Session with Exercise Snacks


In order for this to work, you have to think about the intensity and duration of your regular workouts. You’ll want to match your regular, continuous workout by breaking it down into smaller bits.  

So, if you are working out for 60 minutes, your exercise snacks should add up to 60 minutes over the course of the day. That could be 6 x 10-minute sessions, or 12 x 50-minute sessions. And you MUST match the intensity of your regular workout.  

Intensity is subjective, but you can think about it on a scale of one to 10: One being pretty low intensity, and 10 being all out. If your continuous workout was an eight, the exercise snacks also have to be an eight.

This is a GREAT option if you struggle with the time commitment for a bigger gym session, if you travel frequently, or if you’re the family chauffeur driving kids to after-school activities.

  • Option 2: Keep Your Gym Session and Incorporate Exercise Snacks


In full transparency, this option is what I like to do. I’m one of those people who actually enjoys going to the gym. But after researching this topic for this week’s newsletter, I’m going to incorporate more exercise snacks into my day — even on days I get in a workout.   

Exercise snacks are a blessing on travel days, when I’ve slept in and don’t make it to the gym, or for hectic days when I’m just not getting to the gym that day. It’s reassuring to know that these days aren’t a regression, but a progression.

And frankly, these exercise snacks are one of the few reasons I get my sprint training in on my CAROL Bike. I can pop on it and in 5 minutes, I’ve done 3 x 20 second all-out sprints — and haven’t broken a sweat! (If you find you’re interested in a CAROL Bike, you’ll get a discount using code DRSTEPHANIE.)

NOW

Here are some of my favourite exercise snacks. I encourage you to try these and be creative with your own based on how you like to exercise.

  • While I’m making dinner: 20 pushups, 20 air squats, 20 switch lunges
  • While I’m waiting for a plane: walking lunges back and forth near the boarding gate; wall sits; decline pushups at the gate chair
  • When I have 10 minutes before a meeting starts: CAROL Bike sprints (30-second sprint, 90-second recovery, then repeat 3x), or 30 box jumps on plyo boxes I have at home.
  • When I can opt for walking meetings : I’ll take a call and go for a walk around the block. Pro tip: if you have an iPhone, put the “Voice Isolation” mode on. This prioritizes your voice over background noise. I have taken calls at loud airports and at my kids’ soccer games where people are screaming. The lucky caller on the other end of the line cannot hear anything but me.
  • When I’m on soccer mom dutyI alternate lunges on the side of the pitch while my boys practice, and in the summer I sprint around the track (if there is one). This helps me feel less like an Uber driver.

Submit Your Exercise Snacks!

Let us know if you already have some great exercise snacks. Or, if you’re inspired to create new ones, share those, too. Reply to this email and we’ll compile some of the best ideas from you in a downloadable PDF!

Question of the Week

Q: What do you eat after one of your workouts?

I’m preparing a bigger newsletter for you on peri-exercise fuel, but here are some guidelines following a workout.

RESISTANCE TRAINING & CARDIO

I always follow any lift session or cardio with a combination of protein and carbohydrates.  On mornings when I exercise early, this will be breakfast. One recent morning I had five egg whites + one whole egg omelette on a piece of sourdough toast. On the side was 1/4 avocado and some fruit. I also treat myself to a cappuccino with whole fat milk. Not a Starbucks triple grande venti purple long short with sprinkles and foam (or whatever the cool cats are drinking these days) but a regular 3/4 cup-sized cappuccino cup.

If I am about to get my period, I’ll also add in one scoop of protein in water as my “drink” instead of water. I do this because I know I’m going to be hungrier in week four of my cycle, and I preempt that with more calories and specifically more protein.

(If you want to learn more about eating around your cycle, check out my book, The Betty Body.)

YOUR TURN!

I’ll be answering your questions every week right here in the Mini Pause! Let me know what’s on your mind. I’ll be checking for both questions and feedback at support@drstephanieestima.com.

What I Recommend: BON CHARGE

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I keep this mask beside my desk and work with it on because it molds comfortably and easily to my face. I can choose the intensity and wear it for as little as 10 minutes and still get all the benefits.

I invite you to visit Bon Charge to learn more about the Red Light Face Mask. Use code DRSTEPHANIE to save 15% sitewide.