1.   Certain wealthy men exercised unbridled power.

2.   All three men exercise from one to two hours daily to keep their bones and muscles as strong as possible in their weightless environment.

3.   Each man was exercising his free will to pursue a sport that was potentially dangerous.

4.   How do men exercise on the beach?

5.   The three men exercised daily on the space station to maintain their muscles and bones, which weaken in weightlessness.

6.   The three men exercised each day on the space station to maintain their muscles and bones, which weaken in weightlessness.

7.   To ease their return, the three men exercise daily on a treadmill.