Athlete Testing

Exercise scientists at the Korey Stringer Institute use advanced testing equipment in the MISSION Heat Laboratory located in the Department of Kinesiology in the College of Agriculture, Health and Natural Resources at the University of Connecticut to examine your current level of performance and fitness. Our MISSION Heat Lab is a state-of-the-art facility housing an environmental chamber to examine the influence of heat on exercising individuals. Our testing can not only assure that you are exercising safely, but also so that you can obtain your maximal level of performance.

Timex cyclist

KSI Assisted Athletes in the Ironman Lake Placid 2012.


KSI provides the testing options to fit your needs so you can OPTIMIZE YOUR PERFORMANCE AND BE SAFE.

We offer the following testing options as well as feedback that you can use immediately!


KSI Consulting



VO2max Test:


Whether you are looking to assess your baseline aerobic fitness level or conduct repeated tests leading up to that bigrace, KSI can help you. The VO2max test is the most commonly used test to assess the cardio-respiratory fitness of an athlete. The more aerobically trained you are, the better you are able to utilize oxygen. While gradually increasing the intensity of either running or cycling we measure how much oxygen your body is using. This is especially helpful for athletes who wish to see their current fitness status and tailor training off this value.

During your VO2max test we can also provide your velocity at your VO2max VVO2 which really tells you more about your aerobic capabilities as well as give you an estimate of your anaerobic threshold (AT). With these values we can help to identify speed or heart rate zones in which you can train. Last we can provide you with your exercise economy and/or running economy (RE) which is the energy demand for a given velocity. Runners/cyclists with good RE use less energy and therefore less oxygen than runners/cyclists with poor RE at the same velocity/watts.VO2 bike

Chris Thomas, Timex Multisport Team Athlete conducting a VO2max test.

Substrate Utilization Test:

Interested in knowing if you burn predominately carbs or fat at race pace? What you use for energy at different speeds/watts is important for you to know going into training or a race so that you can replace those calories. With a modified VO2max protocol we can determine how much energy you are using at a given intensity and what percentage of that comes from carbohydrate or fat. When combined with our nutrition and hydration analysis, we remove the guesswork from your diet plan.


substrate utilizationSample substrate utilization print out.

Sweat Rate and Sweat Electrolyte Test:

The key to a great hydration plan is knowing what you are losing while you exercise.  To determine your sweat rate we measure your body mass losses through sweating and urination and take into account your fluid intake during a standardized exercise session. Knowing your sweat rate will reduce your body temperature and heart rate enabling you to maintain performance. To determine your electrolyte needs we use the gold standard whole body washdown technique. With this method we are able to determine the exact amount of electrolytes you lose in your sweat in order to help you understand what you need to replace. We will provide you the exact amount of electrolytes you lose in grams of sodium, potassium and chloride (per hour and per liter of sweat) so that you can better replace your losses and keep moving in those long hot races.

 sweat testingWhole body sweat electrolyte washdown at Kona Ironman World Championships in 2011.

Heat Tolerance Test (HTT):

With our environmental chamber set to 104°F and 40% humidity we will have you exercise for 90-minutes to observe how your body reacts to the heat. Understanding how well you handle heat stress can help you prepare for training or racing. If you have struggled in the heat previously this test in com\bination with a VO2max test can enable us to provide you with a sample return to activity and acclimatization protocol that suits your needs. For victims of heat illness such as exertional heatstroke, a specific meeting with one or more experts to determine your course of action for resuming activity.

core temp triathleteCore body temperature monitoring at the Lake Pladic Ironman in 2012.

Lactate Threshold (LT):

Your lactate threshold is the exercise intensity at which lactate begins to accumulate in your blood. This can be measured through finger or ear pricks during a progressive exercise bout. Similar to the anaerobic threshold, this ramping protocol can help tailor your training intensities and pace to your exact physiological responses, thereby optimizing physiological gain during your training.  This testing can take place on a bike or treadmill, expanding the benefits to runners, cyclists, and other athletes.

 LT cyclingElite triathlete Chris Thomas warming up for his lactate threshold test.

Heat Acclimatization:

Have a race coming up in the heat?  Heat acclimatization not only can improve your performance in the heat but in warm and cool weather races too! Decreased heart rate and body temperature coupled with more efficient sweating and increased blood volume are all benefits of 10-14 days of heat acclimatization. Gain access to our environmental chamber to acclimatize to any climate.



Performance and Fitness Testing Services
VO2max Test (includes AT, VVO2 & RE) $600
Substrate Utilization Test (includes VO2max ) $600
Lactate Threshold (bike or treadmill) $400
Basic Heat Tolerance Testing (HTT)


One Day HTT with VO2max

(HTT with VO2max and body fat analysis allows us to provide you with a specific/detail heat acclimatization protocol based on your level of fitness)


Advanced Heat Tolerance Testing


Two Day HTT with VO2max

(HTT with VO2max on Day 1 followed by HTT at increased intensity on Day 2 allows us to determine if you are heat tolerant at intensities similar to your desired level of training/racing)

Sweat Rate and Sweat Electrolyte Analysis $400
Heat Acclimatization $200/hr
Hydration Analysis $75
Body Composition (Skin Folds) $75
Performance Packages
The Runner’s Relay-VO2max Test on Treadmill-Sweat Rate (no electrolytes)

-Body Composition (skin fold)

-Hydration Analysis Consultation

$700 ($800 with electrolytes)
The Cyclist’s Circuit-VO2max Test on Bike or Cycle Trainer-Sweat Rate (no electrolytes)

-Body Composition (skin fold)

-Hydration Analysis Consultation

$700 ($800 with electrolytes)
The Triathlete’s Triumph-VO2max Test on both Bike & Treadmill OR Substrate Utilization-Sweat Rate (no electrolytes)

-Body Composition (skin fold)

-Hydration Analysis Consultation

$850 ($950 with electrolytes)

The KSI Difference

Exercise testing performed at the Korey Stringer Institute is tailored specifically for each athlete. We provide you with the information you want and provide results you can use to maximize your training.

The MISSION Heat Lab features a 450 sq. ft. environmental chamber capable of precisely controlling ambient temperature from 40°F to 110°F, humidity from 20% to 90% and radiant heat simulating from full cloud cover to unobstructed sun. The facility is prepared to simulate the thermal environments faced by athletes, warfighters and laborers. Unique to the facility is the inclusion of a bathroom and dedicated cooling area within the environmental chamber, allowing for uninterrupted testing. The lab is also fully equipped with state-of-the-art equipment, including high speed treadmills, advanced bike ergometers and a comprehensive physiological monitoring system, to apply exact exercise intensities and accurately measure the responses. The MISSION Heat lab and Human Performance Laboratory at University of Connecticut is also involved in a wide array of research topics such as environmental physiology, muscle physiology, reproductive physiology, lipid metabolism, children’s fitness, women’s health, muscle biochemistry, nutrition, cardiovascular physiology and disease risk factors, weight loss and strength training.

When you come for your test, one of our experienced staff members will work directly with you. Our staff has a broad array of athlete testing expertise with athletes of all ages and competition levels. Specifically, we have worked with the NFL, elite triathletes as well as youth and high school athletes. Whether you are trying to reach the next level in competition or simply optimize your training, we can help you gauge your abilities and develop techniques to increase performance.

We do not simply provide you with a number after your testing is complete. Not only do we provide detailed analysis of your test results, we provide a follow up discussion with every test, to fully explain your results and help apply them to your training.

Sample Groups KSI and Staff have Assisted

  • 2011 Super Bowl Champion NY Football Giants
  • Elite Triathletes at Ironman Lake Placid and Kona World Championships
  • Timex Multisport Team
  •  UConn Men’s Soccer Team
  • UConn’s Women’s Cross Country Team
  • United States Army
  • United States Air Force
  • United States Army Rangers
  • 2014 Portugal World Cup Soccer Team
  • National Football League
  • Former athletes, laborers, and soldiers who struggle from and/or survived heat illnesses

Swim Start

Athlete Stories and Testimonials

Matt Coz, Burning River 100 Finisher

“It’s been a while since the KSI Team helped me with my quest for a 100 mile finish. After last year’s failed attempt, I went back to the drawing board armed with the insight you gave me regarding my electrolyte and fueling needs.

I’m happy to be able to tell you that this past weekend, after another long training season, I ground my way to a finish in The Burning River 100, the race that had beaten me 3 prior times. I won no awards for style or speed, finishing with a less than robust 34 minutes to spare, (which was 33 minutes better than I hoped for :). My crew was unbelievable, and your guidance gave me the to do the proper testing and practicing for the race, leaving me far more confident and knowledgeable around how to execute on race day.

That’s a long-winded backdrop…What I really want to say is…Thank You! Your efforts helped an old wanna be runner to get to a goal that, for a very long time, seemed like a pipe dream. It is now very real and it feels unbelievably good.

you again and all the best to everyone at KSI. I could not have done it without you and the Team at KSI”



Any services provided by the Korey Stringer Institute are on a consulting basis only.  Our services are not substitutes for professional medical advice, diagnosis, or treatment.  Always seek the advice of your physician, athletic trainer, or other qualified health provider with any questions you may have regarding a medical condition. The Korey Stringer Institute and the University of Connecticut simply offer suggestions to optimize the prevention, recognition, and treatment of certain medical conditions. Reliance on any information provided by the Korey Stringer Institute, Korey Stringer Institute website, Korey Stringer Institute employees, others assisting the Korey Stringer Institute at the invitation of Korey Stringer Institute is solely at your own risk.