That doesn't mean you shouldn't exercise, because it can absolutely speed up your results and make you stronger and more confident. Many people turn to steady-state cardio like running for a straight 30 minutes. Although it will burn calories, it's not the most effective workout for losing weight.
ACE-certified fitness instructor John Kersbergen said, "The most efficient way to get results is to do some form of high-intensity interval training (HIIT) for a total-body workout and to focus on strength training certain body parts (upper body, lower body, core) on different days of the week."
For strength training, bodyweight exercises could be enough — like squats, for example — but adding weights will get results faster. Also, focus on "total-body compound movements that recruit more muscles and burn more calories," such as dumbbell thrusters. You only need to do 45-minute workouts three to four times a week to get results, so try this 45-minute HIIT workout.