Effect of Endurance Training on Lactate Threshold

running in the woods

A Review by Alyssa Bialowas

Tools for aerobic fitness evaluation in endurance training are used in sport and clinical fields to test blood lactate levels for training and competition. Anaerobic threshold (LTAN) is defined as the point during exercise at which lactic acid starts to accumulate in the muscles, the point in intense exercise that anaerobic processes become more dominant. Endurance performance prediction and prescribing optimal training intensities are two important applications of studying anaerobic threshold.

There is controversy in the sport and clinical fields around the need to develop additional tools for aerobic fitness evaluation, and their validity to determine aerobic fitness. The purpose of this study was to analyze the sensitivity of glucose minimum intensity (GMI) and LMI to endurance training.

Related Article: HIIT Responses In Endurance & Sprint Athletes

The Study

A group of 8 trained cyclists participated in this study. They completed two sets of tests, one after the off-season period in March and the other after 12 weeks of training in June. The first test consisted of a maximal incremental test to evaluate the maximal oxygen uptake (VO2max), and the second assessed LMI and GMI intensity.

The GMI and LMI test started off with a 30 second Windgate test (an all-out, very difficult anaerobic exercise test performed on a stationary bike), followed by 8 minutes of rest, and then cycled until voluntary exhaustion. In the end of each stage, blood samples were taken, and heart rate was monitored during the test.

The training program consisted of 12 weeks at three different testing intensities, and blood lactate was determined after testing in each zone. 

The Results

In the tests after training, blood lactate levels after maximal exercise was significantly greater than in pre-testing. No significant differences were found in blood glucose levels between pre and post. In all of the cyclists, VO2 max, LMI, and GMI increased significantly after 12 weeks of high intensity endurance training.


Both GMI and LMI are important indexes of aerobic fitness, and can be used as an important index to training prescription in well-trained cyclists and athletes. High intensity interval training proved very effective in improving maximal oxygen uptake, and should be used as a training tool for improving aerobic fitness.

Related Article: The Elevation Training Mask – A Competitive Advantage

You Might Like:

Woman exercising with her dog

How to Get Back Into Exercise After Time Off

With COVID-19 restrictions slowly starting to ease, you are probably itching to get back into exercise – I mean, I know I am. However, I am here to tell you that you should probably take...
Woman stretching

How to Set Health Goals After COVID-19

We are almost there. By all accounts, things are finally on the up, and we should be able to get back into our normal routine over the coming months. Which means that you have a...
Intermittent Fasting and running

Ketogenic Diet and Running: What You Need to Know

If you have been around the health and fitness space over the last few years, then you would have heard about the ketogenic diet. You know that diet that helps with weight loss, metabolic disease,...
Woman running

Intermittent Fasting and Running

Intermittent fasting has quickly become one of the most popular dietary strategies of the decade. Over the last few years, it has evolved from a niche topic into something that everyone is doing. And with...
Build resiliency

How to Build Resiliency During A Pandemic

We are living through one of the most serious situations in modern history. This whole COVID-19 thing has turned the world as we know it upside down. And we could not have been any more...


Campos, E., de Andrade, V., de Araujo, G., Junior, P., Kalva-Filho, C., Papoti, M., &

Zagatto, A. “Effect of Endurance Training on The Lactate and Glucose Minimum Intensities.” Journal of Sport Science and Medicine, 17, 117-123.

Woman performing HIIT outside

Can HIIT Improve Mental Health?

Women playing soccer

Exercise Research is Underrepresented in Female Athletes

Someone jump roping

How to Incorporate HIIT in Every Workout

Woman eating chocolate bar.

Does Dark Chocolate Aid In Muscle Recovery?

Man running on a path

The Autoimmune Athlete

woman stretching and looking at a view of the mountains

Endurance Athletes: Why Women Win In The Long Run

man stretching on a log

The Ketogenic Diet: How It Affects Athletic Performance

The word keto spelled with food

The Effects of Exercising On a High Fat Diet

ab roller

How Core Strength Effects Athletic Performance

two women

Generation 100: The 3 Year Follow Up

Leave a Reply