ROM Resist & New Zealand

Cardiac output is peaked. Circulation through sustained muscle tension is delayed waiting for off periods which are few and very brief. Typically any leg muscle in walking is very briefly on.

You push a swing, briefly and it goes away... then comes back. After the big first push the ones that follow are minimal – replace for wind resistance and friction at the top. There is a lot of free time until the next push. No fatigue as blood with fuel and oxygen has plenty of delivery time.