Alternative Names
Suspended Knee Tuck, Suspended Knee Tucks, Suspension Ab Crunch, Suspension Jack Knife, Suspension Jackknife, Suspension Knee Tuck, Suspension Knee Tucks, TRX Ab Crunch, TRX Ab Crunch, TRX Jack Knife, TRX Jackknife, TRX Knee Tuck, TRX Knee Tucks