HIIT stands for high intensity interval training, and it’s a great way to build muscle without spending hours in the gym. The idea is to go all out for a short period of time, followed by a slower pace that allows you to recover. Think of jogging or sprinting all out for 30 seconds, followed by a minute or two of rest, then repeat. Short bursts of high-intensity exercises keep your heart rate up while adding lean muscle. More muscle mass equals calories burned on a daily basis. Also, the more lean muscle you have, the higher your metabolism is.
The value obtained from this equation is the estimated number of calories a person can consume in a day to maintain their body-weight assuming they remain at rest. This value is multiplied by an activity factor (generally 1.2-1.95) dependent on a person's typical levels of exercise in order to obtain a more realistic value for maintaining body-weight (since people are less likely to be at rest throughout the course of an entire day). 1 pound of body weight, or approximately 0.45 kg, equates to about 3,500 calories. As such, in order to lose 1 pound per week, it is recommended that 500 calories be shaved off the estimate of calories necessary for weight maintenance per day. For example, if a person has an estimated allotment of 2,500 calories per day to maintain body-weight, consuming 2,000 calories per day for one week would theoretically result in 3,500 calories (or 1 pound) lost during the period.
Do you have 20lbs to lose? 30lbs? More? The Weight Loss Target Date calculator gives you an idea of how long it will take to reach your weight loss goal. After you enter your info, the calculator estimates how many calories you need to stay at the same weight (total daily calorie needs). It then calculates 6 different calorie deficits and how long it will take you to lose those pounds.
Weight loss is a reduction of the total body mass, due to a mean loss of fluid, body fat or adipose tissue and/or lean mass, namely bone mineral deposits, muscle, tendon and other connective tissue. Weihgt loss can occur unintentionally due to an underlying disease or can arise from a conscious effort to improve an actual or perceived overweight or obese state.

The plan is simple: Commit to two weeks of restricted dieting, then transfer to a sustainable regime. Phase one: Cut out restaurant food, added sugar, eating while watching TV, snacking on anything other than fruits and veggies, and limit meat and dairy. You’re also asked to add four healthy habits, simple tweaks like having a good breakfast every morning.
"When going out for fast food, I used to get the large-size value meal. Now, I satisfy a craving by ordering just one item: a small order of fries or a six-piece box of chicken nuggets. So far, I've shaved off 16 pounds in seven weeks, and I'm on track to being thinner than my high school self for my 10-year reunion later this year." —Miranda Jarrell, Birmingham, AL