Ivan I give you a brief overview of the lactic energy system and training (anaerobic):
The sequence of energy supply in a hard effort lasting less than five minutes is as follows:
ATP is used at high rates in the first 10-15 seconds. It is primarily regenerated by the ATP-CP system which does not develop lactate as a by-product.
Simultaneously, glycolysis is activated and ATP and lactate generated. This "lactate" system cannot supply ATP as quickly as the ATP-CP system but can sustain energy supply for up to 60 seconds or possibly a little longer. Its energy supply is faster than the aerobic system when glycogen is used as fuel.
Eventually, the aerobic system is brought into play, particularly as the event approaches five minutes, and glycogen is used as fuel in the oxidative process. It is likely that very little fat is oxidized because the supply of energy from that source would be too slow for short duration events but may contribute some energy to the long-duration events.
Also frequent anaerobic training may lead to exhaustion and even overtraining as a result of muscle damage from the acidity and other metabolic waste products (mainly lactic acid, CO2, etc.). The optimal training frequency for training the lactic acid (glycolytic) system is not clear but it is agreed that prolonged periods of anaerobic training is hazardous to an athlete's health and leads to overstraining.
The maintenance of aerobic fitness during anaerobic training is a critical factor for training this range of events. At least several aerobic workouts should be inserted each week during periods of anaerobic training emphasis. It is also known that interval-type anaerobic training provides some maintenance of aerobic function, so there is no need to get carried away with aerobic maintenance training. One role of aerobic sessions during anaerobic training is that is promotes recovery from glycolytic work.
Ivan is crucial that you incorporate periods of AEROBIC TRAINING in your regime to maximise the anaerobic segment of your training.
Lap swimming is ideal for apnea.
Click here and you'll understand:
http://www.sportsci.org/news/news9709/sleivert.html
Also to reduce muscle soreness, the best way to alleviate it after exercise is important finishing your workout with the following segments in the last part fo your training -right after your specific apnea-:
1. Swimming at 80-85% of your maximum heart rate (MHR). Around 3-4 laps.
2. Swimming at 40% of your MHR for another 7-6 laps/
3. Stretch the area you believe it'll be sore.
4. Maintain a diet high in carbs and low fat (something I'm not presently doing because I'm trimming down after a bodybuilding period, which explains partly why I get so many trigger points in the neck).
I hope my reply has been helpful.
Take care, gerard.