Q:  High Jump style appears to have changed over the years. What is the current philosophy on High Jump technique?

A:  The 1968 Mexico City Olympics marked the international debut of Dick Fosbury and his celebrated "Fosbury flop," which would soon revolutionize high-jumping.

Read about Dick Fosbury and the "flop"...

http://www.olympic.org/uk/athletes/profiles/bio_uk.asp?par_i_id=18061

Read about High Jump Approach Development (by Cliff Rovelto)...

http://ustfccca.cstv.com/convention/seminars/rovelto-adv-hj-symposium.ppt