Day Five on Keto

Since last Sunday, I’ve have been on a Ketogenic diet. Typically prescribed for people with various neurological disorders (Epilepsy, Alzheimer’s disease, Parkinson’s disease…), Low Carb High-Fat (LCHF) diets have recently come to the foray for endurance athletes as an alternative to the usual High Carb (HC) diet! As part of my valiant attempt to further sports science, I’ve volunteered myself as a participant in a running study that examines the effect of a LCHF diet on long distance runners!

The change in my diet could not have been greater. Going from fueled from carbohydrates and sugars — then suddenly — to fat and protein, it has not been easy. Today marks my fifth day on Keto, and here’s what I have endured so far:

Day 1 began following a time to exhaustion test (read: a very long run!). Craving for carbs and sugars, I had to abstain. Instead, I ate a large four egg omelette fried in 30g of butter! Later, I had two cups of coffee with 100g of cream and a chicken breast that bathed in the oven in 30g of olive oil. Yikes! As the sun went down, I became drowsy, developed a runny nose and an unshakable headache overcame me. All signs and symptoms of the noctorious Keto Flu.

Day 2. I was at work and I felt dopey, drowsy and easily irritable. Following from yesterday’s ordeal, today was a rest day. Again, I ate nothing but fats and protein. I also had vegetables that were low in carbs and sugars, such as lettuce, mushrooms and asparagus. These were also drowned in either olive oil or full fat mayonnaise (of course!).

Day 3. Although the Keto Flu lingered, it was much less than before. I also felt like my mind was clearer and was able to focus better than before. Although having thought about it, this could have simply been due to the sudden uptake of the coffee with cream. I seldom drink coffee. I decided to go for a short recovery run. Worst 10K run of my life! What should have barely broken a sweat ended up being more torturous than the last 10K of an all out marathon! The run started off at 14km/h ended in 11km/h. My body was aching from head to toe.

Day 4 was similar to the previous day. Again, I went out for a slow run. The first two kilometers felt mostly like a recovery run, but things got progressively harder. I even had to stop, and doubt I could have run much further than the 12 km I did!

Day 5 (today). From the previous days it appeared that the first two kilometers were much easier than the rest. I decide to do a set of intervals. Less than a week ago, I did 6x1200m @ 3:20min/km with 2:15 between each rep. Today, I could only manage 4x1200m and none of the reps were remotely close in speed! What’s more, the last rep was at least 15% slower than any of the ones done last week. I hate to think of how slow the remaining two reps would have been, had I grit my teeth and slogged it out!

I feel that I’m gradually overcoming the Keto flu and becoming fat adapted. Time will tell how this Keto diet turns out over the next 25 days I am on it!