Spin class has helped me discover my threshold before I completely run outta gas. It allows me to watch my heart rate when I'm really pushing hard to see what my magic number is. I've found that this year I can push hard at 170 - 173 ish and it feels like 160 - 163 BPM used to feel. I can work at higher intensities for longer periods of time now and not bonk. I don't know for sure but I guess this indicates I finally have achieved some conditioning?

Spin helps me smooth out my pedal stroke for sure. Some of our instructors are outdoor riders and they are very good at reminding you about form and continuity on your pedal stroke. Fluid pedal stroke equates to much more endurance with less effort once the season starts.

Kinda glad you guys brought this up it reminded me of WHY I sweat my butt of 3 or 4 times a week. You all are great! You help keep me motivated when there is 6 inches of snow on.