Carbs Before or After a Workout?
It's Not Really an Either/Or Question. Here's How I Think About Carbohydrate Timing Around Training.
This is one of those questions that sounds more complicated than it needs to be. The short answer is that both matter, just for different reasons. Carbohydrates before a workout fuel your performance. Carbohydrates after a workout replenish your glycogen stores and support recovery. The timing and amount depends on your goals and the type of session you're doing.
Let me break down both sides.
Which matters more: Carbs before or after a workout?
Honestly, this is the wrong way to frame the question, but I understand why people ask it. So let me give you a straight answer on each.
If performance is what you care about, it's the carbs before
If you want to feel strong and switched on during the session itself, eating carbohydrates beforehand makes a real difference. Carbs are the fuel your body actually wants to use for exercise. Walk in with decent glycogen stores and you can push harder and last longer instead of hitting that flat, heavy feeling halfway through.
My advice here is simple. Stick to complex carbs before training, not sugar. Whole grains, fruit and vegetables give you a steady stream of energy. A sugary snack might give you a quick lift but it tends to leave you flatter than when you started, right in the middle of your session.
More on complex carbohydrates →
If recovery is what you care about, it's the carbs after
If your priority is recovering well and actually growing from the work you just did, the carbs after your session are doing the heavy lifting. You've just emptied your glycogen tank. Eating carbs afterwards refills it, helps repair the muscle you just trained and stops your body from breaking down more muscle than it needs to. There's also an insulin response involved that helps usher those nutrients into the right places for repair.
Here's the bit I genuinely care about. Carbs alone after training are good. Carbs paired with protein are far better. The combination speeds up glycogen refilling and gives your body the amino acids it actually needs to rebuild. That's why every one of my post-workout meals has both.
So which matters more? Genuinely, it depends what you're training for that day. Going for a personal best needs the carbs before. Coming back from a brutal session needs the carbs after. Most of us need a bit of both, and the right balance comes down to your training, your goals and frankly just paying attention to how you feel.
Carbs before a workout: My approach
I prefer complex carbohydrates before training, not simple sugars. Whole grains, fruit, and vegetables give me steady energy through the session rather than a spike that fades.
Timing-wise, I aim to eat 1 to 3 hours before training to allow enough time for digestion. If you have a sensitive stomach or prefer to train without food sitting in your gut, a small liquid carbohydrate source closer to the session works well.
My personal approach varies depending on when I train. I prefer to work out mid-morning on an empty stomach, making sure I've had a good serve of complex carbohydrates the night before. That fuel is still available the next morning. If I'm training in the afternoon, I'll have a light breakfast with a moderate amount of carbohydrates a couple of hours before the session.
Should you eat before exercise? →
Carbs after a workout: My approach
Post-workout carbohydrates are non-negotiable for me. After a solid training session, my muscles need glycogen replenishment and my body needs the nutrients to repair and adapt.
My go-to post-workout carbohydrate sources are whole grains like rice and quinoa, potatoes, legumes, and fruit. These provide a steady release of energy along with the vitamins, minerals, and fibre that support recovery.
I aim to eat within 30 minutes to 2 hours after training. During this window, your muscles are most receptive to absorbing and using carbohydrates for glycogen replenishment. I always pair the carbohydrates with a solid protein source to maximise recovery.
The amount of post-workout carbohydrates you need depends on how hard and how long you trained. A 45-minute weights session and a two-hour endurance ride require very different levels of replenishment. Listen to your body and adjust accordingly.
If you want personalised guidance on how to structure your carbohydrate intake around training, a nutrition coach can help you work out the right amounts and timing for your specific goals.
Back to Workout Nutrition Hub →
Health should feel like your best life, not a break from it.
Marco ☕
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About Me I'm Marco Asnicar, personal trainer, nutrition coach and founder of Vitality Marco. I didn't discover the Mediterranean method. I grew up living it, shaped by Italian roots, real food and movement as a natural part of daily life. I coach men and women aged 35 to 55 to do the same. No restriction. No fads. No giving up the life you love. Just a way of eating and living that genuinely feels good and gets better every year. Want to know more about my story and approach? Read my full About Me page → |