Sprint Training 100m Athletes - Efrain Ambriz, Harlingen HS1 Introduction 5:44 2 Team Philosophy 4:42 3 Sprint Training - Philosophy 5:22 4 Triple Extension 4:57 5 Energy Systems 1:25 6 Training Plan 8:03 7 Acceleration and Cue 3:18 8 Overview and Q/A's 14:40Efrain Ambriz is the Head Cross Country and Track Coach at Harlingen High School. He is in his 13th year coaching Track and Field and 8th as Head Coach. His track and�cross country�teams have won a combined 9 district titles along w 4 area titles. In 2021, the�boys�teams won the Region IV 6A titles in cross country and track and field. Individually, he has had 10 state qualifiers and most recently helped guide Jose Garcia to the 6A 100m State Championship.