Please choose the correct ending to complete the given sentence: Spinning: A group of women are inside a dark gym. They are all riding on recumbent bikes. they

Ending1: move slowly, as they are exhausted from constant riding. Ending2: go back and forth, spinning as they go. Ending3: then bike down the track. Ending4: tire the bike out, then put it back up and practice.

Answer format: ending1/ending2/ending3/ending4