1) There is no standard Benching pattern. Without writing a long post on the subject here are a few basics:
A) The closer the grip, the more recruitment of the triceps muscles. The wider the grip, the more pectorals come into play.
B) The Barbell and Dumbbells are best for benching as they don't require a fixed pattern of movement. You should be able to handle a greater amount of weight using the barbell, so the barbell benching should be placed first in an exercise program.
It's also a bit of a pain the ass to get a set of large dumbbells into place.
But, it's also important not to forsake the dumbbells as they recruit more of the stabilizing muscles during a lift. They're also safer to us as you get tired during the workout.
C) It a bit too bad that your bench isn't adjustable, as I still believe it is best to work the pecs from a variety of angles to get full development. In the interest of fairness, there was a study that felt it wasn't all that important.
D) Just a few other things about benching.
Do not put your feet up on the bench. Some folks do this as they feel it helps better recruit the pecs and takes the leg drive out of benching. What they don't tell you is that you'll waste quite a bit of energy balancing yourself on the bench. It also wrecks your focus. This idea is an accident waiting to happen.
You should be able to firmly plant your feet while benching. If you can't do this comfortably, then either lower or raise the bench till you can.
Don't use a false(thumbless) grip while benching. While I haven't seen a accident during flat or incline* benching that was that horrible when a person was using a regular grip, I have when people were using a false grip. The bar slips and it eiter crashes into your throat or mouth most of the time . * The Decline bench is the cause of most deadly accidents. Due to the position of the lift the bar always winds up accross your neck during these accidents, choking you out. Always use a rack, spotter(s) or dumbbells for decline pressing.
If you find yourself caught under the bar during a press, don't wait, try to get the weight as far away from your face and throat as possible. Most of the time after that, you can roll the bar off you(still painful, but better than the other option).
Some folks leave the collars off the bar, that way if you run into problems, you can tilt the bar and dump the weights off one side.
With time, you'll be able to reasonably predict when you'll fail while lifting.
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Generally, when setting up for a bench:
1) Lay down, get comfy

.
2) Plant your feet.
3) Remove the Barbell(or have it handed off to you).
4) Lower the bar to your chest under control.
5) As you get ready to lift the weight-
A) Push down on the floor with your feet.
B) Flair your lats.
C) Keep your head firmly against the bench pad.
D) Explode the bar off your chest in a controlled fashion.
* If you find your head or feet coming off the bench or floor, the weight is a bit too heavy. lower it. If your back arches to much, the weight is also too heavy, lower it.
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Since you want to workout for pure strength, here are a few things to remember:
1-5 reps is the optimal range for the most strength gain, as this range increases neural drive(Simply put, your nervous system and muscles learn to work better together, plus a few other things).
6-12 reps is best for both strength and muscle gains.
12 reps+ is used to gain muscular endurance.
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Rest periods also vary with the type of training you'll be doing. The heavier the weight you'll be using, the more rest you'll need. The longer rest periods allow your nervous system to recover. Generally, when one is doing heavy Powerlifting type training, the rest periods are at least 2 mins+.
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