How would your pedalling be affected if you only had one gear on your bike?

If you only had one gear on your bike, your pedalling would be affected by a fixed gear ratio, limiting your ability to adapt to different terrains. On steep inclines, you might struggle to maintain speed and power, while on flat surfaces, you might find it challenging to reach high speeds. This lack of gear flexibility can lead to increased physical strain and fatigue, particularly on varied terrain. Overall, your pedalling efficiency would be compromised.