Who has a good system for determining equality of workouts? Obviously time and distance are not good, because a 2 hour ride is definitely not the same as a 2 hour run. Does anyone have a good way to equate swim/bike/run?
My average workout lately has been 2 hours on the trainer. Today my trainer broke, so I went to the pool for the second time since september, and I swam 4200 yards. Equivalent workout?
Swim : Run :: Phi^2 : 1 (Overall stress on body, based on time alone, not distance covered.)
Swim : Bike :: 1 : 1 (Overall stress on body, based on time alone, not distance covered)
Swim : Run :: 1 : 4 (Distance covered on completely flat course)
Bike : Run :: Phi^2 : 1 (Distance covered in superman position on completely flat course)
So, for an athlete that was trained perfectly equally (highly theoretical of course) between the three disciplines, we would use the equations below to figure out the equivalent bike and run workouts.
Run workout equivalent stress = (4,200 x 4) / (phi^2) = 6,417 yards
Bike workout equivalent stress = 6,417 x phi^2 x phi^2 = 43,979 yards = 4,200 x 4 x phi^2