Sodium bicarbonate is available in powder or capsule form. Chronic supplementation of sodium bicarbonate greatly increases your lactate threshold, or the point just before the pH of your blood becomes more acidic; it is used primarily for high intensity training. Chronic loading entails you consume 0.4g of sodium bicarbonate per kilogram of your body weight three days per week for eight weeks. If you have several races or matches in one day, serial loading buffers your blood for as long as 24 hours. Consume 0.3 to 0.5 g of sodium bicarbonate per kilogram of body weight per day; split this into three to four small doses for three to five days up to the day before your competition. Use sodium bicarbonate before a highly intense race or event such as sprinting or weightlifting. Consume 0.3 g of sodium bicarbonate per kilogram of body weight, split between three to four doses and taken 60 to 90 minutes before your event, according to a 2008 article by Scott Riewald, Ph.D., published in the "Strength and Conditioning Journal."