PE 461- test 7- Energy expenditure and fatigue

Carbohydrate oxidation yields ___ ATP per molecule of oxygen consumed when compared to the ATP yield per oxygen molecule for fat

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Which of the following RERs is typical for a resting individual?

0.78

Typical BMR values are

1,200-2,400 kcal/day

As sub maximal exercise intensity increases, VO2

increases proportionally

Which is NOT a purpose served by the EPOC?

Replenishes NADH stores in mitochondria

Replenishes oxygen stores in hemoglobin and myoglobin

Replenishes cytosolic ATP, PCr stores

Clearance of accumulated lactate

Replenishes NADH stores in mitochondria

Oxygen deficit is incurred when

O2 demands exceed O2 consumption in early exercise

The method of estimating total-body expenditure that uses respiratory gases is called

Indirect calorimetry

Which of these statements is NOT true?

It is possible to be physiologically fatigued after use a 200 m sprint (approx 25 s)

Heat build up in muscles can seed up glycogen depletion and hasten the onset of fatigue

Monitoring the RPE is not useful for insight into pending physiological fatigue

The lactate threshold is an important determinant of endurance exercise performance

Monitoring the RPE is not useful for insight into pending physiological fatigue

Which determinant of the lactate threshold is least like to change due to training?

Muscle fiber type

Which of these factors does NOT cause the lactate threshold?

Lack of oxygen delivery to the muscles

Increased recruitment of fast twitch fibers

decrease liver blood flow

Increased blood epinephrine concentrations

Lack of oxygen delivery to the muscles

which of the following is NOT part of the explanation for the occurrence of DOMS?

Eccentric muscle action

Structural damage to muscle cells

Muscle lactate accumulation

Inflammation response

Muscle lactate accumulation

In response to aerobic training, muscle fiber mitochondria

increase in size and number

If Jason Bourne wants to improve his oxidative enzyme and lactate threshold, which interval running program should he follow?

5 sets of 800 meter at 65-75% VO2max with 15 second between sets

Anaerobic training in 30 second bouts increases all but which of the following enzymes?

Phosphofructokinase

Phosphorylase

Lactate dehydrogenase-M

Citrate synthase

Citrate synthase

Which athlete will likely be the most efficient runner?

A marathon runner

If all of these people were running at a pace of 6 minutes per mile with the listed VO2, which is the most efficient runner?

Anna Sassin, with a VO2 of 27 ml/kg/min

Which statement is NOT true?

It is suggested that endurance athlete should spend 10-15 minutes of their training time in High intensity interval training

Interval-ciricuit training is often intended to enhance both aerobic and muscle fitness

A training session that is focused on the phosphagen system will result in high blood lactate levels

High intensity interval training for a novice athlete should incorporate only a small amount of the total exercise time in high intensity exercise

A training session that is focused on the phosphagen system will result in high blood lactate levels

Which of these statements about VO2max is NOT true?

VO2max usually increases as people get older

If a person's VO2max increases with training, they should be able to complete more stages of a VO2max test than in their pre-training state

VO2max is the gold standard measurement of cardiorespiratory fitness

Small increases in VO2max may be attained with sprint training

VO2max usually increases as people get older

Which of these statements is NOT true at all?

Elite athletes lose their metabolic adaptations to training very slowly due to detraining

It make take 4 weeks of training to recover the adaptations lost during a single week of detraining

If someone who has not exercised for many years starts a training program they will likely experience large metabolic adaptations in the first few weeks of training

In response to aerobic training, these will be an increase and the number and activity of the enzymes of beta oxidation

Elite athletes lose their metabolic adaptations to training very slowly due to detraining

Which of these is not true regarding the adaptations to fuel used to make ATP in response to aerobic training?

The body will use more subcutaneous fat during exercise than it did in the pre-training state

Muscle glycogen stores can increase by 50% or more

Intramuscular triglyceride stores will increase

The body will use more fat for fuel during exercise

The body will use more subcutaneous fat during exercise than it did in the pre-training state

Soreness or pain felt during and immediately after an exercise bout

Acute muscle soreness

The ratio of carbon dioxide expired to oxygen consumed at the level of the lungs

respiratory exchange ratio

The point during exercise of increasing intensity at which blood lactate begins to accumulate above resting levels, where lactate clearance is no longer able to keep up with lactate production

lactate threshold

The maximal capacity for oxygen consumption by the body during maximal exertion

maximal oxygen uptake

General sensations of tiredness and accompanying decrements in muscular performance

fatigue