On July 13th approximately 12:30am I rolled into Inverness as the first finisher of the Pan Celtic long route: 1400 extremely challenging miles, 5 ferries, 2 crashes, 1 dog bite, 1 broken phone, approximately 20 hours sleep (in beds) and all in 6ish days.
Pacing an ultra-cycling event is a balance between physical capacity, mental fortitude, and tactical decision-making. No matter if you’re riding for the adventure, or racing at the ‘pointy’ end these events are extremely challenging and certainly no walk in the park!
In this article I am going to focus on a performance aspect and although speed/distances will vary for everyone the concepts discussed are still applicable. I paced my ride based on my own physical fitness using a POWER METER and I applied my sport science knowledge and previous ultra-racing experience to not only win the Pan Celtic BUT ALSO and MORE IMPORTANTLY finish in the best physical condition I have ever managed (relatively).
To determine how to pace a race of this duration it is vital to understand the demands of it and be realistic; for me it was based on the assumption of 3-4 hours good quality sleep per 24 hours and 16-20 hours of riding (depending on stopped time efficiency) for 6 days. TIP 1 I avoid faffing and wasting times at feed stops by leaving my garmin running and one of my data fields is ‘average speed’- this forces a sense of urgency whenever you need to stop as your elapsed average will quickly drop the longer you are stationary! The less you are stationary during the day, the more you can sleep! TIP 2 before you arrive at your ‘feeds’ plan ahead what you’re going to get so you can run straight in and pick up what you need; it is very easy to stand blankly looking at the biscuit aisle/fridge section in a convenience store deciding what to buy when you don’t have an appetite!
To achieve these sort of durations on the bike for multiple days in a row, you need to understand that you are going to be in a extremely fatigued state; which you can deeply exasperate if you push it too hard (and/or fuel incorrectly). This is because you can never fully compensate the amount of energy you’re burning (while still processing it and not causing gastrointestinal distress). TIP 3 do not push harder at the start just to ‘create a gap’ or on a hill ‘to get it over with’ IT WILL NOT be beneficial in the long run! This is because the energy demand of these high power efforts exponentially increases; you can quickly burn through your glycogen stores which will then promote muscle breakdown (Gluconeogenesis).
With all the above in mind, I devised a concept: Functional Threshold Power at Maximal Fatigue
A mistake I think a lot of people make, and I have done previously, is assume that if you ride at your ‘normal’ zone 1/2 and fuel correctly you should be able to ride pretty much indefinitely. This assumption is wrong - it will work for 12-24 hours, maybe a little longer, but not for multi-day races as your body becomes depleted and lack of recovery catches up on you. So in the lead up to Pan Celtic I calculated a new set of ‘zones’ based on a protocol which required riding to a high level of fatigue before completing a ‘threshold style test’. This gave me an entirely new set of numbers to work from.
By sticking to these new numbers early on in the race, despite feeling very easy, I was able to maintain my intensity level throughout the whole race and I did not suffer with any common ailments which have previously hampered me like seriously swollen & sore knees or Shermers Neck. Reviewing my power files it is clear; except for the Isle of Man TT where I pushed a little harder because of the 12 hour gap after finishing, I remained consistent throughout the whole race - in previous editions I have always suffered after 36-48 hours with tendonitis in the knees from overdoing it. In fact for the last push from Glengelg I was still able to manage 15mph @ 150W avg (2.3wkg) for the final 14 hours - 200 miles and 16,000 ft of climbing - including a 45 minute effort over the mighty Bealach na Ba @ 210W (3.3Wkg). This is almost identical to my first day power through the lakes.
I was extremely careful to never push harder than the roads (and my gearing) forced me. Believe it or not the longest period of sustained power (just over 300W) was 70 seconds up the steepest section of Hardknott pass (an intensity I can hold for about 2 hours when fresh!). My ultra lightweight strategy also aided this aspect as you can imagine!
This style of riding may not suit everyone; it is worth pointing out I don't have to stare at my bike computer - most of the time I have it on the map screen as you quickly build an understanding of what the intensity should feel like. As well as utilising a power meter to pace my ride, it is also important to listen to the body and ‘feel the speed’ of the bike - TIP 4: When you’re going fast, it is much more efficient to ease right back on the power and only pedal to maintain momentum. Your power gives much more bang for buck when you apply it at slow speeds (hills, headwinds and accelerating). I hope this guide provides some useful information and potentially a new perspective! I hope to cover some more topics in future like: fuelling and packing strategy.
If you would like more information, or help on how to pace your next race then please get in touch. I perform training reviews and performance consultations as well as coaching.
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POWER METER - I used Assioma Favero Duo pedals. They needed charging once; which was very easy to do during one of my sleep stops and only required 2 small adapters for my micro USB cables.