Speed vs Weight loss
Runner’s World says that for every pound you lose, you run a 2 second faster mile. In races, this equates to: Pounds lost: 2 5k (-12.4 sec); 10k (-25 sec); half marathon (-52 sec); marathon (-1min45sec) Pounds lost: 5 5k (-31 sec); 10k (-1min2sec); half marathon (-2min11sec); marathon (-4min22sec) Pounds lost: 10 5k…
