Originally Posted by
chasm54
Some people - I think between 10% and 20% of the population - are non-responders to aerobic exercise. They can train and train, but their VO2 max and aerobic threshold remains the same. ...
I was not aware of this, but I know from personal experience that some of us seem to be non-responders -- in my case, slow- and limited-responders -- to muscle-building exercise.
As for speed, I was a slow-poke when I took up cycling at age 12, and I have been a medium-poke most of my adult life. People pass me on the road, and I pass other folks.
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069