(Vlada Karpovich/Pexels)Next in the ranks was walking, followed by resistance training (also known as strength training, which includes workouts like Pilates and weight lifting). The researchers also found that the yoga regimen that worked best to improve sleep had a "significantly superior" effect compared to aerobic exercise. The same goes for other exercises that have been identified as helpful in similar studies: tai chi, Pilates, and aerobic exercise, for instance. And, again and again, the research highlights forms of exercise that involve resistance (even ones that aren't specifically labeled 'resistance training'). The yoga study was published in Sleep and Biological Rhythms.