So, I changed into my gym clothes with the intention of working out. Then I was so lazy I decided I would just do some strength training in my room on the floor (saving the 16 steps to the gym from my front door). I laid back in the sit-up position and promptly fell asleep on the floor until Julia knocked on my door to say goodbye. By that point, I needed to get ready for work and skip the attempt at a workout.
I resigned to running the treadmill for 2 miles this evening to justify eating the yummy dinner Julia cooked.
On Lactic Acid: Beginning this week and next week, TNT runners will see an addition to the normal workout, "LT" or Lactic Acid Threshold. Without getting into the hard science of LT's we'll give you a quick run down and why we use them.
Carbohydrates are broken down by the liver and converted to glucose (sugar). Muscles then either use the glucose or store it as glycogen. During exercise glycogen is broken down to glucose. This reaction produces energy which fuels muscles. There are two routes that can be taken during this conversion. The glucose can be converted into pyruvic acid, yielding a high amount of energy, or it can be converted to lactic acid. Lactic acid is a temporary end to the energy yielding process. Lactic acid is not bad, without it we would not be able to have brief but
high intensity exercise. Too much lactic acid accumulation however will slow you down. The heavy leg feeling we are sure you have all experienced is a result of lactic acid accumulation. This accumulation inhibits muscle contraction.
Organs such as the heart, liver and kidneys are able to convert the lactic acid back to pyruvic acid. So it comes down to balancing production and conversion back to usable energy. To do this you train your body to "deal" with increased amounts of lactic acid. For runners, we need to push our individual limits. During increasing exercise intensity, lactic acid begins to accumulate. Our goal is pushing this threshold (LT) and increasing you bodies' ability to clear the lactic acid. The end result will allow you to run longer and further, while holding off fatigue.
So this is how we use them in our workouts: After warming up for 10-15 minutes at your normal running pace, increase your
effort to 75-85% for the next 5 minutes or whatever the schedule dictates. During the LT portion of the workout, maintain good form and concentrate on your breathing. After the timed effort return to 60-70% effort and finish the run.