I read on Paul Jaminet's Perfect Health Diet blog a number of times that he recommends all exercise be done during the day, not at night, because circadian rhythm is important to health and weight loss. We naturally seem to do better to move during the day and rest at night. I read this somewhere among these posts:
Circadian Rhythm Therapy | Perfect Health Diet
Exercise | Perfect Health Diet
Female, 5'3", 48, Starting weight: 163lbs. Current weight: 135.
Starting squat: 45lbs. Current squat: 145 x 4.