Daniels' Running Formula

by Jack Daniels

2 × 4 min H with 3 min jg plus 4 × 3 min H with 2 min jg 1 × 4 min H with a 3-min jg plus 2 × 3 min H with 2 min jg + 3 × 2 min H with 1 min jg + 4 × 1 min H with 30 sec jg

H workout