84 - Dan Bigham

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• 4:15 Dan’s interest in the sea level hour record
• 8:00 sea level vs altitude hour attempts
  • At altitude, reduce aero drag by ~20% to 25% (at world record hour speeds) while only losing 10% of aerobic capacity
  • The higher the speed the greater the benefit of altitude. That is, the faster the event, the higher up you want to go
• 12:15 at Dan’s speed, 1W saved in his setup = 50m of extra distance in the hour attempt
• 12:30 the physiological demands of Dan’s hour record
  • A Watts / CdA of 2250, which works out to ~370W @ a CdA of 0.164!
  • Living on your TT bike
  • Train at a race-relevant internal inertia (cadence)
  • The potential role of central nervous system (CNS) fatigue
  • Learning to maintain that optimized position for the duration of the event
• 24:15 the sitting up vs aero tradeoff when climbing
  • ~15W benefit to sit up vs aero position, which for Dan makes enough of a difference at ~27kph
  • The value of a stretch during a position change is not to be undervalued
• 28:30 the value of efficient cornering 
• 30:15 the role of CNS fatigue in performance in an hour record attempt
  • Not well understood at present
  • Dan’s group is studying this effect by taking measurement of nerve impulses to the driving muscles over time and looking at changes
• 36:45 the effect of non-round chainrings
• 40:00 Dan’s non-aerodynamic optimizations
  • The more aerodynamically optimized you become, the more reason there is to look at equipment
  • A new, secret crank set
  • Drivetrain lubricants, chain, cog and chainring design 
• 51:30 Dan’s aero optimization
  • Skin suits
  • Front ends / cockpits
  • Aero sensors
• 74:30 some psychological demands of an hour record bid

Check out Dan's retail venture WattShop as well as his Instagram page for products and updates on his upcoming hour attempt.