We have a 14' 8" x 11' bedroom that we are using as an exercise room. The floor is a medium nap carpet over carpet pad and cement. We want rubber flooring on a 13' x 8' section for a workout area. We will have a 400 lb Peloton treadmill sitting on it and a Bowflex strength machine. The rest of the area will be for yoga, Zumba, weights, etc. Will 3/8" be thick enough not to flex underfoot when we work out?