Originally Posted by
Carbonfiberboy
...What's happening when the same effort rather suddenly gets easier? Is it endorphins that dull the sensations, or muscle fiber recruitment, or increased blood flow, or? I'm using a hub PM, seems quite reliable.
This. All of the above.
The past couple of months I've been doing more walking and jogging, and some days find I'm more energized after a 30-60 minute walk/jog and ready for a bike ride. Seems to warm up the body better than a spin on the indoor trainer -- more muscles being used.
Ditto, the brain/body chemicals that dull the usual aches and pains and energize us. Often the best I ever feel is after a good warmup. And the worst is 4-6 hours later after it wears off.