Jump squats
Jump squats require a little more room and some tolerant downstairs neighbors. They’re also a great treat for legs. Work up to three sets of 50. Go deep into the squat for full effect. Wear your stretchiest pajamas to get as low as you can.
Kettle bells and cross fit
People into cross fit often take their workouts to the gym. If your gym keeps late hours, you can, too. If not, do cross fit at home. Invest in a kettle bell (one’s actually enough for your workouts) and do your dead lifts, air squats and swings. Even without a trainer, you’ll get in a good workout and sleep well.