Problem 5. (25 pt) The value of an individual's maximum static exertion, in a particular posture, can be used to estimate his endurance time for a submaximal exertion in the same

posture, using the following equations [Rhomert, 1960]: T=-90+ 126 36 6 P P² P² + Where P is the required exertion, expressed as a decimal fraction of the maximum exertion T is the predicted endurance time in seconds. Also, the upper limit of heart rate is given by: HR(max) 200 0.65 age (1) Mr. Smith's maximum oxygen update is 2.4L/min. His body mass is 90 kg. What is his VO₂ max per kilogram of body mass? Mr. Smith decides to fly to Hawaii for a holiday. His maximum grip strength is 250 N. His packed suitcase requires a grip force of 200 N when he is carrying it. (2) How long will he be able to carry it before having to stop and rest or change hands? (3) If he is walking at 3 km/h and the distance from the luggage reclaim carousel to the taxi rank is 300m, how many times will he have to stop to change hands due to muscle fatigue? (4) Mr. Smith is 69 years old. His heart rate, while he is carrying the suitcase, is 160 beats/min. Is this excessive? Does he need a new suitcase?