Do a Juice or Lemon Water Fast
Doing a short 1, 2, or 3-day fast is a healthy and relatively easy way to "detox" your body, boost your energy, and lose several pounds quickly. For a juice fast, you'll need a juicer and a wide variety of organic fruits and vegetables. A simpler alternative is a "lemon water" fast where you drink only pure spring water with fresh lemon juice squeezed into it for a day or two. You can also use fresh lime juice if you prefer the taste.
HIIT the Cardio
High intensity interval training (HIIT) is an incredibly effective form of fat-burning cardio exercise. It involves doing short bursts of high-intensity exercise interspersed with periods of active recovery. HIIT is a proven technique that even fitness models use to shed fat before competitions. If you want to lose 30 pounds quickly you should try to do at least 3-5 short (15-30 minutes) HIIT workouts a week.
To change things up, stave off boredom, and keep your body from adapting, you should also go do a fun sport or activity at least once a week. Basketball, soccer, tennis, hiking, bike riding, and martial arts are all good options.
Eat a Good Carb-Only Diet
During this time, avoid all processed carbohydrates. That especially includes anything made with refined sugars or flours. While you're at it, avoid all white potatoes and white rice. All your carbohydrates should come from vegetables, fruits, beans, and legumes. Be sure to eat plenty of protein and good fats, such as olive oil, avocado, nuts, and seeds.
Losing 30 pounds fast isn't the easiest thing to do but, if you focus your efforts, you can make some big changes in the way your body looks within just a few weeks.