[EXERCISE PHYSIOLOGY CALC].need help with all problems. so please explain step b

Question

[EXERCISE PHYSIOLOGY CALC].need help with all problems.

so please explain step by step for me.

During the interview process for a TSAC specialist position with L.A. County you are given the following questions; A 35 year old firefighter is ascending stairs at a rate of 3 1/2 floors/min with full equipment weighing 85lbs. (includes the SCBA with 57.3 L of CO_2). Evidence suggests he is working at METS. According to recent testing his VO2max = 5.45L/min, he weighs 200lbs, and has 10% bodyfat. 1. What is his relative VO2max? What determines a person's VO2max? 2. What is the relative intensity for him? Relative means what in this case? 3. How long will that O2 last? 4. Is he likely above or below his LT? Does it matter? What is LT? What is a MET? 10yrs later.......... Absolute VO2max decreases 10% and he Gains 30lbs of fat. (3 lbs/yr = just extra 28kcal/day) 5. What is his new relative VO2max? 6. What is the new relative intensity at 3 1/2 floors/minute? 7. If he wants to lose body fat, at what intensity should he perform his cardio at and why? 8. Can you provide him a safe and effective BASIC exercise prescription (Rx) that is EVIDENCE BASED for; aerobic, muscular, and flexibility training? 9. Why does pyruvate form during low intensity exercise and why does lactic acid/lactate form during high intensity exercise? 10. What is the Fick Equation and what does it calculate? Should you KNOW ALL these? Are these calculations hard to calculate? If so, maybe you need a tool? Non-interview questions, but Food for Thought. 11. Should people in public safety be held to fitness standards? Why or why not? 12. Should WE be held to fitness standards? Why or why not? 13. What does it mean to be a professional? 14. What does it mean "to know"? 15. What does "evidence based" mean?

Explanation / Answer

Multiply 5.45Lmin x 1000 ml/L to get 5450 ml/min.

Multiply the weight by 0.454 to convert it from pounds to kgs. The resulting weight is 90.718 kg.

Then to get relative VO2max, divide by body weight to get, 5450ml/min divided by 90.718kg,

VO2 max relative = 60.076 ml/min/kg

VO2 max  is the maximum rate of oxygen consumption as measured during incremental exercise, most typically on a motorized treadmill.Maximal oxygen consumption reflects the aerobic physical fitness of the individual, and is an important determinant of their endurance capacity during prolonged, sub-maximal exercise. The name is derived from V - volume, O2 - oxygen, max - maximum.

VO2 max is expressed either as an absolute rate in (for example) litres of oxygen per minute (L/min) or as a relative rate in (for example) millilitres of oxygen per kilogram of body massper minute (e.g., mL/(kg·min)). The latter expression is often used to compare the performance of endurance sports athletes. However, VO2 max generally does not vary linearly with body mass, either among individuals within a species or among species,so comparisons of the performance capacities of individuals or species that differ in body size must be done with appropriate statistical procedures, such as analysis of covariance.

The factors affecting VO2 are often divided into supply and demand.Supply is the transport of oxygen from the lungs to the mitochondria (including lung diffusion, stroke volume, blood volume, and capillary density of the skeletal muscle) while demand is the rate at which the mitochondria can reduce oxygen in the process of oxidative phosphorylation.

Factors that may affect VO2 max: age, sex, fitness and training, changes in altitude, and action of the ventilatory muscles.

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