Interesting thread.
As a 6'4"+/95kg (lean) rider, I'm well aware of the impact of lugging weight around. I used to be a 5 day/wk gym goer and peaked at a lean weight of 105kg. I used this mass and strength to my advantage playing Aussie Rules Footy. The advantages far outweighed the disadvantages of a lessened endurance.
Then went the knee, (and the footy) and then cycling became far more than part of an off-season fitness maintainence regime.
So the shape changed....
There's no doubt that a couple of kg's can make a big difference.
It's all about sculpting your body for the task at hand.
You're never gonna see a Bunch of guys from the Pro Peleton feature in a Male strip routine..... they'd be lighter than most of the women laughing at them........ but sheesh, have they got a huge power-to-weight ratio. Human formula 1's. - with the endurance to boot !
Getting on with it, I think Duckwah etc would agree with me that when it comes to training, most people are mistaken when they think pumping it out on a bike, or treadmill, or taebo class etc. is the best way to lose weight and maintain condition.
By incorporating the right resistance training into the routine, you're maintaining the thirst and size of your muscles to burn calories.... and keep burning them well after the workout has finished.... i.e : an increased and steady metabolic rate.
Aerobic activity promotes smaller, more dense, more efficient muscles. i.e. They don't have the size or hunger to burn those calories the everyday fitness enthusiast wants to, and they use every calorie more effectively.
Even with my background and basic knowledge, I've become complacent and been sticking to the bike for training. (Mainly through the enthusiasm of the new bike, and the performance gains I've felt in the bunch). But the shape is starting stray from what I want.... whilst I'm training as much as I am, I should be leaner ..... i.e. : my energy burn doesn't continue long after the ride finishes.
So it's off to the gym again, with a weight training routine
to get the physique back and boost the metabolism (plus upper body condition/strength is a great help in a sprint..........)
Time to find that happy medium between too big-too heavy / just right ........ plus it'll keep my wife much happier (the way she goes on, I'm starting to think she married me for my arms & chest

)