My fat fuelled endurance training and lifestyle.

I have been in the endurance world for a decade now and I myself have dipped in and out of it. Not due to losing “motivation” or the lack of love for endurance training, but mainly because I couldn’t grasp a good sustainable routine that would allow me to get fit, remain lean and also stay uninjured with an achilles problem consistently present.

I have always loved the endurance event style training like triathlons and running, as they would pressure me into acting and in essence assist in helping me to stay “fit”. While the extra pressure of the event timeline certainly helps as an external motivator, it also unfortunately pushed me into this yo-yo cycle of training, dieting and relapse. I would go from a normal amount of training to then a huge amount of volume thrusted into the body with only 12-16 weeks left until event day. You know all those programs you can buy online that are along the lines of “12 weeks to race day” promising you better performance, faster splits and weight-loss, and yet in the back of your head you know the program is just a pre-planned program that gets sent to everyone purchasing without any specifics for the person completing. Alongside the constant increase in training volume and intensity, I would start tracking my calories in an effort to lose the necessary 10kg that I knew I should have lost before the race day to make sure I race at my very best. I was at-least real with myself in this manner, completing an endurance event while carrying excess body fat, is just not ideal for both race performance and my overuse injury. I blasted out the 12-16 weeks, and more often than not I would cancel myself out of the event, because not only could I not sustain the training, my achilles pain was coming back and to make matters worse I was still training with a gut (over-fat) and despite the massive drop in calories and extra training, I still couldn’t manage to drop the necessary kilos. I was always hungry after my sessions, i couldn’t go a few hours without the need to eat (otherwise honestly I would just become the most redundant person to be around), what do they call it “hangry”.

Little did I know that it’s not normal to be ‘hangry” and not normal to need food every few hours especially when we have body fat sitting right on us.

I had to stop, I had to take a moment (over a year) and focus on what really needed to be fixed before I could really start to move forward. I needed to lose the weight, gain control over my diet and support the achilles pain I was experiencing before any fitness improvement was realistically going to happen.

So my journey to becoming fat fuelled and fat adapted started, in a push to lose the weight, see consistent training results overtime and cross my fingers becoming lighter would assist the achilles pain (alongside a constant physio appointment).

My initial gateway to this approach was Mark Sisson and Brad Kearns who collectively produced Primal Endurance “Becoming A Fat Burning Beast”. This book was a huge eye opener and gave me a sense of positiveness towards a new approach in the world of endurance training and fuel utilisation. I really gained an appreciation for some of the words that were spoken, particularly the explanation by Brad about heading out the door for a 5-6hr ride and requiring sugar hits to keep going, when you have an available fuel source to use (fat stores) ready and available if your health, fitness and aerobic system is sufficient.

So what did I do? If you know what kind of person I am, you could probably guess…hahaha but if any case, what did I do?

I jumped straight onto the band wagon and cut out carbohydrates from my diet in hopes to start burning more fat and become what is coined a “fat adapted athlete”. The results from this three month self experiment were honestly horrible. No energy throughout the day, training suffered big time and didn’t see the weight loss I had hoped. At the time I was a Club Manager within a top end fitness provider working and travelling 15+hrs/day. I bet some of you reading wouldn’t expect me to say this knowing how I live now and especially that I follow a fat fuelled approach to my endurance training and lifestyle. But it’s true, my first attempt at this low-carb fat fuelled approach was terrible, I gained little to none of the benefits I had read about and thus still needed to dive deeper into even more potential lifestyle changes. I can tell you right now, although I felt rubbish and had lost hope, I was not going to give up, the last thing I will ever do is throw my hands in the air and go “oh well, maybe I am just meant to be like this, maybe I just meant to be this overweight and I am destined to feel tied to food and feel generally like a yo-yo for the rest of my life”. I refuse to think like this and if you aren’t happy with your outcome, it’s all you and it’s only up to you to do something about it. So I dug my heels in and kept reading, learning, implementing and assessing myself over and over again.

So what went wrong?

A few things.

  1. I was still training wrong (volume and intensity was too frequent and too high)
  2. Although diet was considered to be low carb, I was consuming “calorie friendly” meal replacements, shakes, bars and diet was full of seed oils. Felt constantly inflamed (also from training intensity), couldn’t still control my appetite and satiety levels in hopes to control my intake.
  3. Quality/quantity of sleep was poor
  4. Did not realise my metabolic rate was still low from the previous diet phase (yo-yo). I felt downright depressed to be honest, because when you are already feeling like you are eating less, how do you eat “lesser than less”?
  5. I didn’t understand how fuel is utilised within the body and what can inhibit lipolysis (breakdown or “burning” of body fat, not to be mistaken with fat loss), e.g my stress levels, insulin resistance.

Among so many variables like the ones mentioned above, changing the way my body utilises energy is a timely process and not one that happens over night (or in my experience, in three months). Trying to become fat adapted and making up for the many years of high insulin producing foods, really had my metabolic flexibility in a horrible place. I was stuck burning my glycogen stores (otherwise known as sugar stores) and inevitably tied to my food schedule on a daily basis and couldn’t go past 90 minutes of exercise without needing an energy shot of sugar or food to keep me going. This made daily life a constant struggle and weight loss goals even harder. Intuitively it just made no sense to me, I have all this body fat sitting on me, but yet I can’t go a few hours without eating. Every time I start hitting the wall (sugar low/crash) at about the 90 minute mark in each long form session, I would need an external source of energy just to keep me upright.

Going on to learn more about fuel utilisation and specifically within different energy systems (aerobic, anaerobic, ATP/PC) while training, it dawned on me that I was potentially training too frequently and too hard to be really be supporting these initial internal changes. My workouts were pushing me into a sugar burning zone (anaerobic), I still had the same cravings and urges to over consume food and stay tied to this 3-4 hour food schedule so I didn’t run out of energy working and just trying to get through the day. Weeks progress into months and I slowly realised that even the “easy” training I was doing (MAF, Maximum Aerobic Function) was actually still too stressful for the life I was leading and the poor aerobic conditioning I actually had. Go figure right… I was a spin instructor with horrible fitness. So I decided to make my training even easier which brought about LAHR (Low aerobic heart rate), which caters for people still unable to adapt effectively from a MAF or above intensity. Training in only a lower aerobic zone, things really clicked for me, this was when I really started to understand the stress I was under due to the training, diet and life I was living.

Additionally to this dramatic change in my training volume and intensity, I had also come to the conclusion that even though I was on a “low carb” diet in purpose to become more fat adapted, I was still consuming foods that just weren’t “real food” like mentioned above shakes, protein bars and really missed the nutrient benefits as to what real food can offer. In essence I was calorically efficient but nutrient deficient. Go figure I felt like shit ay hahahaha. Understanding more overtime how fat is good for the body, but yet how consuming the right fats are important to get right. A reduction and eventually removal of the industrial seed oils was a big component of this and immediately caused a reduction of inflammation, energy throughout the day was stable and if I missed a meal I was fine. This for me was a revolution, to not be tied to needing to eat and every few hours not only allowed me to control my intake better and thus control body composition, but it also gave me an extra 2 hours per day of time as I wasn’t needed to stop and eat every few hours. Imagine someone giving you an extra 1-2 hours per day, what you could do with that time is super powerful particularly for those who are busy already.

From a birds eye view, I slowed right down (like seriously slow). I took 6-12 months out of any hard training and was strictly within an intensity lower than MAF. Restricted total carbohydrates(mostly removal of refined carbohydrates) to an individual level suited to me and my hunger cues finally normalised. Now my diet consists of mostly meat and green vegetables and (yes high protein/fibre diets cause a higher thermic effect of food and higher levels of satiety), but it was allowing myself to consume fats as a part of my healthy diet without thinking they are “unhealthy”. Satiety levels up from the fat and protein and I could dictate when I would eat rather than “needing to eat”.

While this approach may not suit all individuals, I feel if you are a busy person with weight issues, endurance goals, experiences with yo-yo dieting (famine reaction), inability to control hunger and cravings, unstable energy levels throughout the day, tied to your meal schedule and more, becoming healthier through diet to better burn the fat sitting on you is a huge weight lifted off your shoulders.

So as a result of eating this way, what happened?

I became primarily fat fuelled.

My cravings….gone.

My urge to eat….gone.

My excess fat……gone.

My training volume…..increased.

My running, cycling and swimming pace…..increased (at the same rate of effort).

When running for long distances at high effort, I rely less on total calories per hour (as a large component will come from body fat within time spent in my aerobic zone) and run less risk of gut distress from needing to fuel with more dietary energy intake.

My long form sessions which can be 10 plus hours long entirely fuelled with… own body fat. In fact, just as one example I have even completed the entire OXFAM 100km Trail Walker completely fasted. From dinner at 7pm the Thursday evening before, until Saturday 7pm after with a 100km’s hike and 48 hours standing between the dietary energy intake.

My MAF test for 60min went from 5.8km/hr in 2016 to now 2020 12.6km/hr……performance increased at the same rate of effort and all fat fuelled. You may think this is a good performance increase, but the single most important factor is my stress response is the same. I am travelling 6.8km further every hour with the same stress response to the body. No chronic soreness, little to no potential for burnout and completely in control of my aerobic progression, which for endurance training is the number one key.

Now for some people whom are very insulin sensitive, never yo-yo’s their weight, in control of body fat levels, in control of stress, in control of satiety and food intake and has never experienced the famine reaction before, can definitely get by and even thrive without the need to remove/reduce carbohydrates. For me this just did not work unless I was relying on will power and discipline to tracking my food meticulously, which never lasts. The “everything in moderation” dogma had me spinning wheels for many years allowing my junk food and sugar craving to always get the better of me. I wouldn’t even think about the quality of the food because “the only thing that matters is calories”, I would eat “calories” and burn “calories”. Ever get trapped in this cycle?

In my opinion, if I can control my appetite, body composition, have stable energy throughout the day and support my training performance, I am a happy guy.

If you are someone training for a triathlon and/or marathon but yet carrying excess body fat, becoming more metabolically flexible is a great tool that in essence provides you with stable energy throughout the day through your own stored fat fuels. With a sufficient aerobic base and fat adapted approach, I have no more sugar crashes, no more cravings, no more urges to overeat from the big long training sessions and no longer tied to this “eat less and move more” paradigm, because when you train for hours per week on top of your already busy schedule, how can you possibly have time to move more than an endurance program….?

I wonder if any of you have experienced something similar, comment below if anything resonates with you?

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