Your body begins to change shortly after you start working out. Depending on the intensity of your workout, your body can start to show physical changes within 2-4 weeks. During this time, you may see improved muscle tone, increased strength, and improved endurance.
For longer-term improvements, it is important to stick with your workout program and continue to challenge yourself. With consistent exercise, you can expect to see additional physical changes in the form of increased muscle mass, increased flexibility, improved cardiovascular health, and improved stamina. Depending on your individual goals, it may take anywhere from 3-6 months to see more significant changes in your body.
In addition to physical changes, working out can also yield psychological benefits. Exercise can reduce stress, increase mood, and boost energy levels. These benefits can be felt within a few days of beginning a workout program, and should continue as you keep exercising.
Overall, how quickly your body changes after you start working out depends on the intensity of your workouts and the goals you are trying to reach. You can expect to start seeing physical and psychological changes within a few weeks, with more significant changes occurring over the course of several months.