I found this on another forum

Bigger reductions in risk of five common chronic diseases only achievable with five to seven times more activity, research finds
I've done plenty of research about how one can extend their lifespan as much as possible. There's a few things that stand out.
1. Studies show that fasting and calorie restriction extends lifespan by as much as 30%
2. People who are highly physical active, and thus consume a lot of food tend to die younger. Much younger in the most extreme cases.
3. Morbidly obese people who weigh hundreds of kilograms and massively overconsume tend to die in their early 30's.
4. The oldest surviving people are always slim.
5. Studies show that people who have more physically exhausting jobs have shorter lives than people who have less physically demanding jobs.
6. Eating and exercise causes build up of free radicals; free radicals are said to be the cause of aging.
7. Slow moving animals (relative to body mass though) live the longest lives. A parrot in capivity lives around 30% longer than a wild parrot, and can easily live till 70 years old, despite how small it is. Seeing as I have a parrot myself, I can see why. They mostly just sit in the cage getting very little movement all day long. We see the same in turtles too, the tiny ones can live for 100 years, the bigger species can live hundreds of years. Turtles are very slow moving, very slow metabolism. Conversely small high energy creatures such as flying insects have super fast metabolisms and live for just a few days. A robin (bird) lives for just 1 year, whilst a gerbil lives up to 4 years, or even 8 years in some species.
From all of this I was able to conclude that the secret to living longer is to eat less, thus using less energy and lowering your metabolism. Maintaining a lower body weight whilst not moving around more than necessary will help to keep calorie consumption on the low side of what is necessary to survive and this should give you the longest possible lifespan. For this reason, I stopped going to the gym. I decided it better to allow my body to shed some muscle mass as I'd previously built up a fair bit more than necessary. The biggest bodybuilders/wrestler types tend to live much shorter lives, supporting my idea. You must always adjust for any exercise decrease by eating less food, otherwise it doesn't work because you end up fat and suffer the negative health consequences of that.
What I hope is that if you eat a generally healthy diet and balance your physical exercise so you get just enough and not more than necessary you are effectively 'burning your candle' more softly. This is like the saying, live hard, die fast. I think the opposite is try also, live light, die slow.
Some of you probably already knew this or guessed it, because it's just common sense.
So I get back to the new W.H.O report - that we need to exercise five to seven times more
They're saying we should exercise 7 times more than the current recommended amount. That's quite a big increase, does anyone else find that suspicious?
For reference the current recommendation is to do 150 minutes brisk walking or 75 minutes running per week. They want to increase that to 1050 minutes brisk walking or 525 minutes running per week.
That's nearly 2.5 hours of brisk walking per day, or 75 minutes of running per day, every day of the week.
Brisk walk calories burned:
You'll burn about 415 calories per hour at a regular walking pace (usually about four miles per hour) — that's 57 more than you'd burn on a standard stroll without the baggage.
So to meet the new recommendation you should go on brisk walk for 2.5 hours a day, and you'll burn 1000 extra calories doing that. Considering the average person eats around 2000-2400 calories a day this calculates to a 40% to 50% increase in energy usage.
What happens if you burn a candle 40-50% harder? It dies 40-50% sooner. I highly doubt this directly translates into a 40-50% lifespan reduction because people are more complex than candles. However, I am sure that it does translate into a decrease in lifespan.