Professor Jim Martin

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2:45 meet University of Utah Associate Professor, Jim Martin5:00 the muscle force-velocity relationship in cycling9:15 the surprising importance of muscle deactivationSlow+heavy weight lifting can slow down deactivation12:30 the ideal crank length questionNo change in maximal power in crank lengths between 145mm and 195mm crank arms27:30 Jim’s recommendations for crank length for aero-minded TT and triathlon competitors32:15 the aero / power trade-off36:30 is there any reason not to go for the shortest available crank?38:00 how does crank length affect self-selected cadence?40:00 what about aero drag implications of cadence43:00 the myth of optimal cadence48:15 on pedaling mechanics trainingSelf-selected pedaling technique is the most efficient57:30 the effect on efficiency of non-round chainrings

For the papers that Jim referenced, head to the X3 Training Podcast Page.