Spinning is definitely no ride in the park, though. It will amp up VO2 max (the rate oxygen is carried to the muscles), a sign the body is being pushed. Plus, all that pedaling will work your quads, hamstrings, glutes, calves, and core.
Starboard side - Port side. The sidelights are coloured either red or green. The sidelights determine the priority on the water: the color displayed on the starboard side is green and the red light is on the port side. The sidelights are located in front of the boat.
Port Hand and Starboard Hand Buoys. Port hand buoys are green and starboard hand buoys are red. They show which side of a channel is safest to travel; accordingly, they mark channels or hazards. Generally, green buoys must be passed on the left side of a craft heading upstream, i.e., against the current.