One thing to keep in mind when making a workout plan: It doesn't feel like work if you like it. Make the time zoom past by taking into account whether you enjoy riding a bike but hate running, or love playing pickup games of basketball but hate logging time on a stair stepper machine.
There are three body types; knowing yours is one of the things to know before working out, because fitness routine customized around a body type are more productive.
Ectomorphs have a thin, lean, and long body type, and have a hard time gaining and keeping on weight. So they should plan three workouts a week that focus on total bodywork and aren't too heavy on cardio, which can prompt weight loss.
Known as the "dad bod" in men, endomorphs tend to gain weight easily and carry it around the midsection. Endomorphs should plan out low-impact, continuous workouts that work large muscle groups and boost metabolism. This helps avoid injury and keep weight levels down.
Mesomorphs tends to gain weight easily, but most weight is in muscle mass. Cardio is important to a mesomorphs' conditioning routine, and they should ideally plan three cardio sessions a week. Weightlifting is good too, but keep in mind that reps should stay down, while the amount of weight should be higher.
No matter the body type, as you age workout efforts should shift from cardio to more muscle-building activities, since gaining muscle mass helps boost metabolism. Design workouts that focus on circuit training combined with lower-impact cardio.
No matter what type of workout is planned, the warmup is essential for success -- it preps bodies for a workout and helps prevent injury. Ten minutes of low-impact movements that increase gradually in intensity is the minimum before getting into the main part of a workout. This will save a lot of pain and cost associated with injuries. Even if pressed for time, do not skip the warmup.