Kinesiology 3330F/G Lecture Notes - Lecture 2: Myocyte, Stata, Joule

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 3330F/G
• Professor: Lisa Kowalchuk

Document Summary

Reduction in o2 cost vs. higher and lower cadence. Gross eff. is lowest at 60rpm and higher at the higher cadences. Higher lactate [ ] is greater at the lower cadence. Physiological difference between the lower and higher cadence. The percentage of total chemical energy expended that contributes to external work, with the remainder lost as heat. If just measuring o2 uptake at a po difference between resting vo2 from total vo2- should be higher than gross efficiency. No resistance on bike- overcoming resistance within the cycle- 0 load- then add load- looking at change in o2 uptake between steady state value and difference between steady state vo2 and value for just spinning the legs. Muscle fiber type: atp produced / o2 utilized, atp utilized / unit force. Graph 1: idea about how exercise intensity/duration impacts efficiency. O2 uptake profiles that are specific to a given constant load exercise. Wr is constant- in 10 min period.