A synonym for horizontal is level or laying flat.
Yes if you're laying on something soft.
laying flat on its side is the strongest way.
I think it should be fine. Laying flat on a floor is always better for posture. Go for it! I think it should be fine. Laying flat on a floor is always better for posture. Go for it!
Sit ups on an incline with weights. Then really slow sit ups laying flat on the ground then all the way to touching your toes and back down.Think of keeping your stomach flat or pin to the ground and try not to let your back lift off the ground.Hold and pulse at your hardest spot(usually almost laying back flat). Works great for me:)
open the whole thing so its laying flat and lick it
Yes you can not lay a plasma tv flat. It must be kept at an angle.
Standing up in a closet or laying flat under a bed.In a box would be best.
Plane figure
If the mat is flexible enough, pick it up and roll it in the opposite direction that it was laying. Might have to do this a few time, but it will straighten out and lay flat.
Yes. Supine, S"up"ine. You are laying face "up". Horizontal is parallel to the floor (so you are laying flat). Recumbent means laying. Prone is also laying horizontally (face down), but Supine is the position that is one also called Horizontal Recumbent.
4 is on the front of the green book laying flat. you will find it on very edge of the top of the book