EXSS2022 Lecture Notes - Lecture 14: Thalamus, Thermoreceptor, Stroke Volume

• School: University of Sydney
• Department: Exercise and Sport Science
• Course: EXSS2022
• Professor: Chin Moi Chow

Document Summary

Pa & health: physical inactivity leads to, obesity, t2d, cancer, cvd. Net heat loss to the environment: convection, conduction, evaporation, radiation. Rer m (per l o2) in kj/min m (per l o2) in w. Inefficient subjects heat up more (increase their ee without increasing the work done) External work: during pa at a fixed m (energy expenditure), the amount of heat liberated is dependent upon external work required (w) & mechanical efficiency (%) of the activity. Work rate = (force distance) / time. Monark bike (in w): (force on belt (n) rpm 6 m) / Swimming = 1% (w) actually goes into the movement = inefficient; use more energy but move less. Bicycle = 15-23% of metabolic rate (more efficient) Conceptual heat balance equation (m w) = (k + c + r + esk) 4 processes: conduction (k, convection (c, radiation (r, evaporation (e) W = amount of energy transferred to environment.