Abstract: A golfer training device (50) is disclosed. The device (50) includes a first strap (52) which is fastened around a golfer's leg above the knee (36). A second strap (14) is fastened just above the ankle (38) and below the calf muscle of the same leg. A third strap (16) is joined to and interconnects both the first and second straps (52, 14), and runs vertically up behind the leg to a type of quick-release adjusting clasp (70). All three straps are made of a substantially inextensible, flexible material. The length of the third strap (16) can be shortened by pulling on an adjusting strap (30), thereby causing the leg to bend at the knee (36). A tube (64) behind the golfer's knee (36) ensures that there is also a horizontal pull on strap (52), which helps to securely hold strap (52) in place and prevent it from slipping down the leg.