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BAM! (Ball Acceleration Maximizer)
INCREASE YOUR CLUBHEAD SPEED BETWEEN 10 AND 20 MPH IN 10 WEEKS
Swing the BAM! 20 times per day as fast as possible without injuring yourself

You start with a head weight that is 100 grams (1/2 of driver head weight).
You can swing this a minimum of 15 mph faster than a 200 gram head weight.
A 10 gram weight is added at the end of each week.
When you reach the 10th week, you will have the clubhead speed you started with on week one.

After the 10th week, lay off for two weeks. Go back to week one and start the cycle over again.
Why does the BAM work? The BAM creates SPECIFIC (the exact motion) and PROGRESSIVE-OVERLOAD-RESISTANCE (lighter to heavier weight).

The brain does not translate one skill to another skill. Just having fast twitch muscles, does not mean that you can create high clubhead speed with a golf club. Your fast twitch muscles must be developed with exact mechanics. You must swing the BAM EXACTLY like you would your driver. The brain builds those specific neuronal pathways and executes them with high speed. The PROGRESSIVE-OVERLOAD-RESISTANCE allows you to maintain the same speed on the 11th week that you had on week one.

Dear Jack,
Several years ago you came out with the “BAM” as a scientific method of increasing ones swing speed (fast twitch muscles). At that time, around 2014, I was swinging my driver at a speed of 87--88 level. After several weeks of working with the “BAM”, the first thing I noticed was how much better I was hitting my driver. As I worked with the “BAM”, my ability to hit my worst clubs improved remarkably. Today my driver swing speed is 105--107. I carry BAM as my 14th club (I swing it before, during, and after rounds) along with a driver and my putter. BAM works! Every time I do it, I'm working on my swing fundamentals, watching the blur, etc. I have thanked you many times during our long distance relationship, and I thank you again for making the great game of golf so much fun.

Brad B.