Surprise surprise but TR do not own sweetspot or the definition of it.
Three other sources state
- Fascat - who devised the term sweetspot
Sweet spot training is a balanced amount of intensity and volume that increases an athlete’s functional threshold power (FTP). … Between these ranges athletes will generate large Training Stress Scores (TSS), increase their Chronic Training Load (CTL) and simultaneously increase power at threshold
- British Cycling
Training* with power allows you to accurately sit in this relatively narrow zone. It’s known as the Sweet Spot because it strikes a desirable balance between the training effects you’ll get from the workouts, most significantly a rise in FTP, with a physiological strain that does not require extended recovery.
- Road Cycling UK magazine
The idea of sweetspot training is to get the most training value for your time on the bike. Sweetspot training therefore balances the exercise intensity and volume of training – hence the term ’ sweetspot '. The training effect you get from a session is a combination of how hard and how long you exercise for.
Driving the pedals harder is a side effect of doing sweetspot not the purpose for sweetspot