“The “before 3 p.m.” part requires a little more explanation. Some research has found that people who exercise regularly are more likely to do so in the morning—because, as we discussed in the morning routine section, mornings tend to be more regimented in people’s lives. If you build exercise into your morning routine, it will happen, whereas a planned 5 p.m. workout might be foiled by a meeting that runs late or a kid needing a ride home. Yet”