To compare easy rowing to walking, it is like a slow uphill walk.
But rowing uses more muscles than walking
Indoor rowing is like rowing against the current of a river at exactly the same speed as the current, so the boat remains motionless relative to the river bank (floor and the walls of the room).
Today’s session was another easy 15K like yesterday, except today’s included a 500 meter sprint starting when the distance counted down to 1,000 meters. That sprint increased total calories burned by 8. To compare apples to calories, that extra 8 calories would be the equivalent to about 1/2 ounce of apples.
Happy trails.