I got SPARQ trainning resistance parachute just the other day. now with parachutes should i wait for a windy day to use this? when i used it, i didnt get much resistance at all.

im 167lbs and im using a <170lbs medium sizes chute, should i use the Large one that goes from 170-210lbs?

Is there any way to get a maximum performance from these parachutes or are they just not working out for sprinting?