I forgot one!

After completing yesterday's entry, I realized that I forgot one of the most common situations that create eccentric muscle activity within the pedal stroke.

Eccentric quad activity on the upstroke. Typically, this occurs at higher cadences when riders are pedaling faster than their coordination will allow. It's my opinion that this is present yet unnoticed at slower cadences as well but it doesn't show up until the rider starts bouncing in the saddle.

Think about it. If a rider starts bouncing up and down at higher cadences, they are producing enough force to partially lift their body weight off saddle. That's a lot of force. No wonder the heart rate goes up when inefficient cyclists pedal at higher cadences(even if wattage remains constant). The source of this resistance is internal to the human machine.