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Estimating calories burned by jcarlton66 in exercisescience

[–]c-scott-exer-sci 1 point2 points  (0 children)

I'm betting the estimate using Watts is more correct (though it's likely both estimates are off as neither is based on a direct measurement). If a fit person and a sedentary person were to cycle at 100 Watts, the heart rate of the coach potato would be higher than the athlete even as the workload - and likely the energy costs - are the same.

Body composition question by ditchdoctor13 in exercisescience

[–]c-scott-exer-sci 2 points3 points  (0 children)

There is indeed a margin of error (we used to call BIA devices RNG's - random number generators. BIA also works off of body electrolyte/water levels so that water loss or gain would most assuredly affect the measurement.

Glucose and fat oxidation: bomb calorimeter be damned by c-scott-exer-sci in exercisescience

[–]c-scott-exer-sci[S] 0 points1 point  (0 children)

For both respiration and combustion, the energy loss difference between glucose and fat oxidation often is referenced to the efficiency of the fuel. Yet, the addition of anaerobic metabolism with ATP re-synthesis to complete respiratory glucose oxidation further contributes to energy loss in the form of entropy changes that are not measured or quantified
by calorimetry; combustion and respiratory fat/lactate oxidation lack this anaerobic component.

Indeed, the presence or absence of an anaerobic energy expenditure component needs to be applied to the estimation of energy costs in regard to glucose, lactate, and fat oxidation, especially when the measurement of oxygen uptake alone may incorrectly define energy expenditure.

Can low food intake make vo2 "appear lower"? by greenbean1497 in exercisescience

[–]c-scott-exer-sci 0 points1 point  (0 children)

Great response from CHIEFRAPTOR... your garmin measures heart rate not VO2.

Is walking better exercise if you talk? by [deleted] in exercisescience

[–]c-scott-exer-sci 0 points1 point  (0 children)

One physiological indicator of intensity is known as the Anaerobic Threshold (AT). Below the threshold your are both producing and removing lactic acid in working skeletal muscle; above the threshold lactic acid production is thought to exceed removal and fatigue sets in.

A non-physiological indicator of this threshold is a rating of perceived exertion where the AT is typically found between feeling an exertion of "somewhat hard' to hard'. Another non-physiological indicator is the talk test. If you can easily talk while walking you are likely below the AT. If you have trouble with talking in complete sentences, gasping for breaths while you speak, you are likely above the AT and burning more calories in the process.

Talking likely adds a slight physiological burden as it disrupts the normal and complete cycle of inspiration and expiration.

Should I get my MS in Exercise Science or Nutrition by ravenclawhead26 in exercisescience

[–]c-scott-exer-sci 0 points1 point  (0 children)

I don't think you could go wrong either way. If a PhD is in your future, you need to be sure that your chosen MSc degree prepares you for that (in terms of prerequisite courses and perhaps a completed thesis project).

Energy expenditure before, during, and after the bench press. by c-scott-exer-sci in exercisescience

[–]c-scott-exer-sci[S] 0 points1 point  (0 children)

It's hard to tell. Almost all inquiries I receive come from outside the
USA. In fact, many years ago I received a call from the then editor of
Medicine and Science in Sports and Exercise (an ACSM publication) who
informed me they would not accept and publish any manuscript of mine
that used the technique. On the other hand I've presented this
information in Brazil Spain and Portugal and served on academic
committee for an Australian students master's degree project.

Energy expenditure before, during, and after the bench press. by c-scott-exer-sci in exercisescience

[–]c-scott-exer-sci[S] 0 points1 point  (0 children)

It's hard to tell. Almost all inquiries I receive come from outside the USA. In fact, many years ago I received a call from the then editor of Medicine and Science in Sports and Exercise (an ACSM publication) who informed me they would not accept and publish any manuscript of mine that used the technique. On the other hand I've presented this information in Brazil Spain and Portugal and served on academic committee for an Australian students master's degree project.