An aerobic stepper or jump rope are great options that can be used to get a quick aerobic exercise in if you don’t have enough time to head to the gym
The science: Studies have shown that moderate and regular physical activity has therapeutic and sleep promoting benefits. The most beneficial effect comes from aerobic endurance training and acute exercise that lasts for more than an hour. On the other hand, be careful not to take things too far. High intensity, exhaustive, long duration exercise may disrupt sleep by decreasing REM sleep and increasing wakefulness (Sherrill et al., 1998).