Thank you all for your contributions. I'm enjoying reading everyone's view although the line between faad diet and scientifically grounded diet will, I suspect, remain unclear. In part this is a result of the historic (mis)information on the 'prudent diet' and the impact of ever increasing levels of processed food and the need to maintain/grow sales amongst the producers. I could head into a review of free market economics and the 'benefits' for wider society here, but that belongs elsewhere.
Some summary thoughts at this stage, but please keep the discussion going - my original questions were open and not focused on weight loss, so much as a diet being what we eat for life (not faddish):
- In the west we eat too much/indulge ourselves in general
- We eat too much refined/processed food with far too much sugar and refined carbs.
- We don't exercise enough - I think a baseline is an hour a day of moderate - a bit sweaty and out of breath - or a little it less if it's properly hard. Too much exercise, aka extreme endurance exercise, has negative impact compared to the hour a day baseline. Not sure about Audax, probably depends how hard you ride. As a society and individuals, we are full of excuses about how little exercise we 'nned' to do.
- I'm not convinced that absolute diet breakdown is that important, not least because humans have been and remain very adaptable omnivores. I strongly suspect that at all periods of human history, diets have depended on time and place and what you could get (yes hunder is normal fro time to time). However, in our culture it is easy to gorge on carb based sweet things and eat so much carb that our bodies get over burdened with the processing load leading to metabolic syndrome, and to eat too much of everything else too. The much vaunted ability of carbs to block fat useage through insulin response is clearly true in this circumstance.
- I also think that human adaptabiity should allow us to fuel with either fat or carb if we are eating sensibly and functioning normally. This is probably lost because we eat too much and have forgotten how to be hungry or accept hunger.
- Not withstanding the above and particularly for people wanting to ride a bike or run for a long time, these is a clear benefit to learning to burn fat as fuel and to conserve glycogen for shorter efforts. Given my racing history on foot at 800m up to 5km or 10km, my focus was always on speed and VO2 max, but even 20 years ago we knew that marathon runners needed to maximise fat metabolism at race pace to manage/avoid the 'wall'. Doing this probably requires an acceptance/use of 'nutritional ketosis' from time to time. Peter Attia, online at the eating academy, has some pretty impressive stats on fat burning after following a low to no carb diet, albeit one that is a little bit relaxed now.
- I retain an aversion to gels and supplements. I can't imagine myself drinking/taking '40ml of MCCT oil' or 8 gm of BCAA supplement. I like to eat food and have a strong belief that that's what we need. Sardine sandwiches are good. If I head down the supplements path then why not hit the testosterone patches, hGH and EPO, with some IGF3 etc whilst I'm at it. Fine as medication, but not as food.
- I know crossfit is associated with Paleo (correct spelling for the diet given its origin), but in some places its also associated with the chemicals mentioned above, as well as other anabolic agents. These weren't available way back when.
At the moment I'm eating less carb than historically, by intent and as an experiement. I feel better for it - but I've always eaten a lower level of carbs than some other athletes I knew, with the proportion really growing in sedentary times of life... However, it would be wrong to say I am following a low card diet, just one with a bit more moderation. I'm getting the turbo and running shoes out while my hand recovers from my recent fall.
One last thought for tonight - yesterday my Mum told me that the type 2 diabetes, artherioschlerosis and heart disease that they both suffer were not lifestyle diseases. Whilst I love them both dearly and they are two wonderfully kind people, they have done no visible exercise (they 'walk up and down the stairs a lot'!) and have eaten to excess and been overweight for as long as I can remember. The failure to see the connection and the consistent degrading of what counts as exercise is both symptomatic and, I suspect, causal in many of the health problems we face in our aging society.
I am looking forward to the ongoing exchange of views.
Mike