We have a new ebook soon hitting the net: Nutrition The Easy Way A Primer For Combat Sports.
Here's a brief excerpt.
CHAPTER 4 THE TQC FACTOR
TQC has to do with the timing, quantity and composition of the foods (macro and micro) one eats, all important factors when outlining weight-making plans for elite athletes. There are three actual tiers here: before, during and after workouts when you want lipid lysis and lipid oxidation highest while trying to manipulate fat storage during the day. Your nutritional plan should consider the daily training load accordingly.
For this reason fat-burning work like running should be done if possible early in the day before breakfast after your overnight fast. Both the pace and duration should be moderate. Recall that eating stimulates insulin production to balance blood sugar, but insulin also suppresses lipolysis, the breakdown of fat. So if your goal is to burn fat and build lean muscle mass, eating before you run is working against yourself. In fact, research shows that fat breakdown was reduced by nearly 30% for 8 hours during recovery if carbs are eaten before rather than after exercise.
That brings up another point, what researchers call substrate utilization, meaning what fuel source, carbs, fat, etc., provides the necessary energy for a certain level of exercise intensity. Research shows that once intensities reach greater than 65% of one's VO2 max, carbs are the body's fuel of choice. More important the longer exercise at moderate levels goes on free fatty acids from the breakdown of fat (lipolysis) not carbs become the fuel of choice.
This same principle doesn't necessarily apply to your other more intense, sport-specific training like sparring, high intensity (HIIT) or pad work. Here you will definitely need some fuel on board in the form of good low glycemic carbs preferably consumed a few hours before the workout. Note that your training and nutritional goals are to maximize fat loss during exercise and recovery while minimizing fat storage daily. In so doing you're manipulating work loads and food intake.
So you have to keep in mind that these levels of intensity will most likely ramp up protein oxidation causing possible loss of lean muscle mass, not something you want when you're seeking to generate power and explosiveness. Remember: power=(force x time). So your elite athletes will need much more protein than what is usually suggested and not all of your protein will come from food. You will need some supplementation, best in the form of protein shakes with both whey and casein. Casein is a slower acting protein and has a less insulin-producing effect thereby cutting down insulin's suppressive action on lipolysis or fat loss.
How much protein? Well, the vague answer is it's athlete dependent. What 's worked best for us to help maintain muscle mass and offset daily dietary deficits is 2-2.5g/kg of body mass. A 70kg man weighs 140lbs, so 70 x 2g = 140g and 70 x 2.5 = 175g. For the detractors, most of whom have never trained anyone, who might claim this is too much, remember these are elite athletes, not desk jockeys, who frequently train three times per day. To put it mildly they're tearing down some muscle--i.e.--protein. That muscle has to be rebuilt.
We also use another formula. Say your athlete begins camp at 150 lbs and make-weight contract is 135. We invert these numbers usually starting off giving the athlete 135g of protein/day and increasing it to150g/day the closer we get to the weigh-in, perhaps adjusting it somewhat during the taper down period when we begin cutting workload. Much has been discussed and written about the importance of recovery. Proper rest is only one element of recovery. A lot of athletes, trainers and coaches don't understand that nutrition is recovery; that after a hard workout it's the first step and it begins way before bedtime and sleep.
One of the first macro elements to get cut is carbohydrates. As previously noted one of the important roles of insulin, especially in the presence of carbs, is to decrease lipolysis; in other words, slow the process of breaking down fat, just the opposite of your intended goal of decreasing body fat and building more lean muscle mass. There is plenty of evidence in the literature showing that hard training in the presence of reduced carbohydrates actually accelerates fat loss by enhancing the oxidative power of skeletal muscle, ironically the exact opposite of conventional wisdom that one needs a high carb-diet to support intense daily workouts. So don't be too afraid to ramp up the protein to somewhat compensate for those reduced carbs. Those hard-working muscles will love you for it.