We have three different energy systems in our body that we use when we are doing any type of physical activity. All three of these energy systems contribute to the energy needs of the body during any type of
physical activity. These systems do not work independently of each other, but, rather dominate at different times, depending on the duration and the intensity of the activity.
Phosphagen: 0-15 seconds of work; immediate source of
energy required; creatine phosphate and ATP are main energy sources; sprinting, weight lifting, throwing, explosive movements lasting less than 10 seconds. (Level 5 on the above picture)
Anaerobic: 30 seconds - 3mins
of work; somewhat fast/somewhat slow use of energy; uses carbohydrates as main energy source; Weight lifting, HIIT classes, Tabata, pilates, Barre, Zumba, Orange Theory, F45. (Level 3 + 4 on the above picture)
Aerobic:
3mins + of work; slow use of energy; uses either carbohydrate or fat as many fuel source; mile long runs, long bike rides, long bouts of walking, long bouts of swimming. (Level 1 + 2 on the above picture)
Understand what type of demand you are putting on your body so you can expect to see what type of adaptation will come from that demand. Not everything burns fat. Working as hard as fucking possible doesn't automatically trigger fat loss. This stuff is more complicated than your exercise instructor at your favorite HIIT or whatever class they come up with these days is trying to tell you....
...and for the love of god, just go on a damn walk each day...please.
