The Asics Megablast is one of the bounciest super trainers we tested this year.The shoe has the brand’s FF Turbo², an A-TPU midsole foam that delivers explosive bounce.Some runners found the Megablast too squishy while others appreciated its cushiness for hard workouts.When I tested the Saucony Endorphin Pro 5, I went to Central Park and ran the 10K loop. I have a ritual whenever I run that loop: I try to pass as many runners as I possibly can.This run was no different. I sprinted and surged, ticking off runner after runner. I was coming in hot until I heard someone roaring up behind me. There was someone gaining momentum behind me, trying to pass. I held out as hard as I could, quickening my pace the closer his footfalls pounded. Finally, I had to let him go.…