There are several workout types that could be applied and which one of those will be chosen depends on the practitioner. There are people who prefer home workout and there are those who need a gym. Both are effective but there are some advantages that each one has. For example, home workout will save some money and probably a lot of time, especially if there is no gym close to home. Also, a practitioner can set a much better mood for exercising at home than in a gym (choice of music, schedule etc). As for the gym, it contains more workout stations and devices, especially for muscle mass building. Also, there are people with the same interest, and a good advice can always be heard. Additionally, some exercises, especially those that use big weights, need assistance, and that is easily found in a gym.
Home workout might be excellent for cardio workout. It does not require too much strength or any additional tools; all that is needed is some space, some time and a lot of enthusiasm. Cardio workout is excellent for those people who are focusing on reducing weight. This is because exercising can be performed for a long time, thanks to low level of strength needed for the cardio workout and thanks to the presence of oxygen in the muscle contraction process. This happens because muscle contractions are slow in cardio workout, and that will prevent quick accumulation of lactic acid (by some theories, it is directly responsible for inducing exhaustion of the muscles).
As for the exercises used in cardio workout, there is running, swimming, aerobics exercise, generally all exercises that do not require additional weight. Of course, running would require a treadmill, but it can also be done in one spot, with a bit less effect but still effective for warming up. Also, elliptical trainer can be used at home and it might be even more effective solution than a treadmill when it comes to burning calories. As for some other forms, light push-ups should be performed. They are done with propping the body on hands and knees, not feet. Only when this exercise becomes easy, standard push-ups should be done. It is essential for cardio workout to have a lot of repetitions in one set, since that will create the best possible results. Later on, when some strength is built, low weight dumbbells can and should be included in the training session.