Hollow-core models are unsurprisingly some of the most popular door options for the home. These offer the looks and performance you expect from a quality solid-core design, but without the lofty ...

Abstract: Hollow-core photonic bandgap fibers (HC-PBFs) demonstrate exceptional performance with high damage threshold, low nonlinearity, low thermal sensitivity and ultralow bending loss. However, ...

I suppose I just enjoy other types of exercise more (and maybe I got sick of core exercise during ... had my abs fired up — especially plank up-downs and hollow body holds.

But one thing I don’t do consistently (besides resist pressing the snooze button) is choose to do core workouts ... fired up — especially plank up-downs and hollow body holds.

I don’t love planks. There I said it. Isometric exercises (or holding one position) are not my thing. I prefer other types of core exercises (hi dead bugs, bicycle crunches, inchworms ...

Some abs exercises can get a little tedious the more you do them, including planks. Thankfully, there are a few ways you can get a good abs pump and continue to develop core muscle without setting ...