What Is Metabolism?Metabolism is the sum of all chemical processes that take place in the human body tosustain life. Many people are born with slower metabolisms that make them prone toweight gain. Other people, known as lucky ____, are born with faster metabolisms andseem to have no problem being lean regardless of their activity levels or dietary habits.Though metabolic rate is largely determined by genetics, there are various ways toincrease metabolic rate through exercise, nutrition, and supplements. Here we will focussolely on the metabolic impact of a properly executed exercise routine.One of the longest running inside jokes within the fitness industry is the fact thatMonday is international chest day, where most gym-goers will do endless sets and repsof bench presses and chest flies until their bodies burn and swell as if being chewed onby a swarm of ginormous mosquitoes.We can thank the drug-abusing bodybuilding world for the concept of training one bodypart per day for best results. If you open the typical bodybuilding magazine you’ll seethis as an example of a training program (or some variation):Monday: ChestTuesday: QuadsWednesday: BackThursday: HamstringsFriday: TricepsSaturday: BicepsSunday: CalvesKeep in mind that when you take a cocktail of anabolics, just about anything you do willresult in less fat and more muscle—not to mention a host of deadly side effects and thepossibility of growing a tail (anything is possible).The reality is that training your whole body more frequently will result in bigger strengthand muscle gain, greater fat loss, and more metabolic boosts than training each musclegroup once per week—and the science supports this.In a recent study at the University of Alabama, researchers had two groups of menperform two different strength-training programs with the same total training volume(sets and reps) for each muscle group. However, one group split the work across threetotal-body workouts while the other group trained each muscle group separately onetime per week. They discovered that the total body workout group gained five additionalpounds of lean muscle mass compared to their body-part training counterparts.It’s critical to understand that the more muscle you have the greater your restingmetabolic rate (RMR). Your RMR is the total number of calories you burn every dayregardless of activity and adding several pounds of lean muscle mass will result in anadditional daily calorie burn of up to several hundred extra calories per day. Thistranslates into an awesome fat-smashing snowball effect over the course of weeks,months, and years.Another benefit of having more muscle is that your body’s carbohydrate tank getsbigger. The human body has a limited ability to store glycogen (sugar) in your musclesand liver before it spills over into the blood stream and leads to unwanted fat gain. Thetotal amount of glycogen your body can hold, or your sugar tank, depends on a host offactors including gender, body size, age, etc. However, by building more musclethrough high-intensity training, your body can subsequently store more sugar.For example, let’s just say that your sugar tank was originally 250 grams of carbs but isnow 300 grams due to intensive training and muscle-gain. The extra 50 grams ofleeway before your sugar tank overflows means two things:1.) You can consume more total carbohydrates before your sugar tank reaches capacitywhere you then begin to gain fat and smooth out unless that energy is expended.2.) The lower your sugar tank, the more your body will revert to using both dietary andstored fat to make up for that energy deficit.Plus, it doesn’t take a genius to realize that working your entire body each workout willtorch more calories and thus accelerate metabolism and fat loss results. More musclesused equals more total work performed equals more total sugar, fat, and caloriesexpended—all good stuff!THE FIX:​ For busy people looking for the biggest bang for their fitness buck, best results will beachieved with 3 total-body workouts per week with ideally 48 hours between workouts tomaximize muscle growth and recovery.